./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91 --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 e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:04:26,746 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:04:26,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-25 00:04:26,842 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:04:26,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:04:26,871 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:04:26,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:04:26,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:04:26,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:04:26,874 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:04:26,875 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:04:26,876 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:04:26,876 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:04:26,877 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-25 00:04:26,878 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:04:26,878 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:04:26,879 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-25 00:04:26,879 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-25 00:04:26,880 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:04:26,881 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-25 00:04:26,881 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-25 00:04:26,882 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-25 00:04:26,883 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:04:26,884 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:04:26,885 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:04:26,886 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-25 00:04:26,887 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:04:26,887 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:04:26,888 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:04:26,888 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:04:26,889 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:04:26,890 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:04:26,890 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:04:26,891 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:04:26,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:04:26,891 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:04:26,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:04:26,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:04:26,902 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:04:26,902 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:04:26,903 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:04:26,904 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-25 00:04:26,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-25 00:04:26,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:04:26,905 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:04:26,905 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:04:26,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:04:26,906 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_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 [2023-11-25 00:04:27,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:04:27,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:04:27,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:04:27,303 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:04:27,304 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:04:27,305 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-25 00:04:30,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:04:31,140 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:04:31,141 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-25 00:04:31,163 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data/db03a0bd6/9267f9ddb0df452f9f40984b0ce3bbad/FLAGc2d58a5f1 [2023-11-25 00:04:31,182 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data/db03a0bd6/9267f9ddb0df452f9f40984b0ce3bbad [2023-11-25 00:04:31,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:04:31,188 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:04:31,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:31,191 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:04:31,198 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:04:31,199 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,200 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a87034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31, skipping insertion in model container [2023-11-25 00:04:31,200 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,268 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:04:31,559 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-25 00:04:31,572 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-25 00:04:31,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:31,705 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:04:31,744 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-25 00:04:31,747 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-25 00:04:31,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:31,832 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:04:31,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31 WrapperNode [2023-11-25 00:04:31,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:31,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:31,835 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:04:31,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:04:31,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,922 INFO L138 Inliner]: procedures = 27, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-25 00:04:31,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:31,924 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:04:31,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:04:31,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:04:31,937 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,953 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,956 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,985 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:31,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:32,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:32,005 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:04:32,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:04:32,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:04:32,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:04:32,007 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (1/1) ... [2023-11-25 00:04:32,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:04:32,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:32,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:04:32,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:04:32,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:04:32,126 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-25 00:04:32,127 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-25 00:04:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-25 00:04:32,128 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-25 00:04:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-25 00:04:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:04:32,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:04:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:04:32,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:04:32,267 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:04:32,270 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:04:32,902 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:04:33,121 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:04:33,122 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-25 00:04:33,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:33 BoogieIcfgContainer [2023-11-25 00:04:33,124 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:04:33,127 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:04:33,128 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:04:33,132 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:04:33,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:04:31" (1/3) ... [2023-11-25 00:04:33,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf4b26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:33, skipping insertion in model container [2023-11-25 00:04:33,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:31" (2/3) ... [2023-11-25 00:04:33,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf4b26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:33, skipping insertion in model container [2023-11-25 00:04:33,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:33" (3/3) ... [2023-11-25 00:04:33,137 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_4-2a.c.cil.c [2023-11-25 00:04:33,161 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:04:33,161 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-25 00:04:33,219 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:04:33,230 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;@5fb9f81b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:04:33,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-25 00:04:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 37 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-25 00:04:33,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-25 00:04:33,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:33,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-25 00:04:33,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:33,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash 9136577, now seen corresponding path program 1 times [2023-11-25 00:04:33,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-25 00:04:33,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207415155] [2023-11-25 00:04:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:33,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-25 00:04:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-25 00:04:33,412 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-25 00:04:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-25 00:04:33,458 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-25 00:04:33,461 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-25 00:04:33,462 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-11-25 00:04:33,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-25 00:04:33,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-25 00:04:33,473 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-25 00:04:33,479 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-25 00:04:33,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 12:04:33 BoogieIcfgContainer [2023-11-25 00:04:33,505 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-25 00:04:33,507 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-25 00:04:33,507 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-25 00:04:33,508 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-25 00:04:33,508 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:33" (3/4) ... [2023-11-25 00:04:33,513 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-25 00:04:33,514 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-25 00:04:33,516 INFO L158 Benchmark]: Toolchain (without parser) took 2328.66ms. Allocated memory was 117.4MB in the beginning and 169.9MB in the end (delta: 52.4MB). Free memory was 74.1MB in the beginning and 106.7MB in the end (delta: -32.6MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2023-11-25 00:04:33,517 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-25 00:04:33,518 INFO L158 Benchmark]: CACSL2BoogieTranslator took 643.69ms. Allocated memory is still 117.4MB. Free memory was 73.8MB in the beginning and 59.7MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-25 00:04:33,520 INFO L158 Benchmark]: Boogie Procedure Inliner took 88.64ms. Allocated memory is still 117.4MB. Free memory was 59.7MB in the beginning and 58.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-25 00:04:33,528 INFO L158 Benchmark]: Boogie Preprocessor took 81.16ms. Allocated memory is still 117.4MB. Free memory was 58.0MB in the beginning and 56.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-25 00:04:33,529 INFO L158 Benchmark]: RCFGBuilder took 1118.54ms. Allocated memory was 117.4MB in the beginning and 169.9MB in the end (delta: 52.4MB). Free memory was 56.1MB in the beginning and 120.5MB in the end (delta: -64.4MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. [2023-11-25 00:04:33,529 INFO L158 Benchmark]: TraceAbstraction took 377.52ms. Allocated memory is still 169.9MB. Free memory was 120.5MB in the beginning and 106.7MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-25 00:04:33,530 INFO L158 Benchmark]: Witness Printer took 7.50ms. Allocated memory is still 169.9MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-25 00:04:33,541 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 87.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 643.69ms. Allocated memory is still 117.4MB. Free memory was 73.8MB in the beginning and 59.7MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 88.64ms. Allocated memory is still 117.4MB. Free memory was 59.7MB in the beginning and 58.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 81.16ms. Allocated memory is still 117.4MB. Free memory was 58.0MB in the beginning and 56.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1118.54ms. Allocated memory was 117.4MB in the beginning and 169.9MB in the end (delta: 52.4MB). Free memory was 56.1MB in the beginning and 120.5MB in the end (delta: -64.4MB). Peak memory consumption was 22.9MB. Max. memory is 16.1GB. * TraceAbstraction took 377.52ms. Allocated memory is still 169.9MB. Free memory was 120.5MB in the beginning and 106.7MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 7.50ms. Allocated memory is still 169.9MB. Free memory is still 106.7MB. 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: 48]: 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 someBinaryFLOATComparisonOperation at line 47, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L310] COND TRUE __VERIFIER_nondet_int() [L311] CALL main1() [L39] float IN = __VERIFIER_nondet_float(); [L40] CALL assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L34] COND FALSE !(!cond) [L40] RET assume_abort_if_not(IN >= 0.0f && IN < 1.0f) [L42] float x = IN; [L44-L45] float result = 1.0f + 0.5f*x - 0.125f*x*x + 0.0625f*x*x*x - 0.0390625f*x*x*x*x; VAL [IN=53, x=53] [L47] COND TRUE !(result >= 0.0f && result < 1.39844f) VAL [IN=53, x=53] [L48] reach_error() VAL [IN=53, x=53] - UnprovableResult [Line: 61]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 49 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, 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=49occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 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 [2023-11-25 00:04:33,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91 --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 e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-25 00:04:36,342 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-25 00:04:36,482 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-25 00:04:36,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-25 00:04:36,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-25 00:04:36,552 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-25 00:04:36,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-25 00:04:36,554 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-25 00:04:36,555 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-25 00:04:36,561 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-25 00:04:36,562 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-25 00:04:36,562 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-25 00:04:36,563 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-25 00:04:36,565 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-25 00:04:36,565 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-25 00:04:36,566 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-25 00:04:36,567 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-25 00:04:36,568 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-25 00:04:36,568 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-25 00:04:36,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-25 00:04:36,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-25 00:04:36,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-25 00:04:36,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-25 00:04:36,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-25 00:04:36,572 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-25 00:04:36,573 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-25 00:04:36,573 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-25 00:04:36,574 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-25 00:04:36,574 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-25 00:04:36,575 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-25 00:04:36,576 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-25 00:04:36,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-25 00:04:36,577 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-25 00:04:36,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-25 00:04:36,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:04:36,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-25 00:04:36,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-25 00:04:36,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-25 00:04:36,579 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-25 00:04:36,580 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-25 00:04:36,581 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-25 00:04:36,581 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-25 00:04:36,581 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-25 00:04:36,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-25 00:04:36,582 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_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e448f16723ad202cc72d167f8951516486910b6c33698da967b6635bbb5adec7 [2023-11-25 00:04:37,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-25 00:04:37,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-25 00:04:37,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-25 00:04:37,111 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-25 00:04:37,114 INFO L274 PluginConnector]: CDTParser initialized [2023-11-25 00:04:37,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-25 00:04:40,537 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-25 00:04:40,824 INFO L384 CDTParser]: Found 1 translation units. [2023-11-25 00:04:40,824 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c [2023-11-25 00:04:40,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data/b2344b490/538edbd4f9ea4fd1a73cceb7a4cd299c/FLAGce16d14fa [2023-11-25 00:04:40,851 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/data/b2344b490/538edbd4f9ea4fd1a73cceb7a4cd299c [2023-11-25 00:04:40,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-25 00:04:40,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-25 00:04:40,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:40,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-25 00:04:40,875 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-25 00:04:40,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:40" (1/1) ... [2023-11-25 00:04:40,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557640ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:40, skipping insertion in model container [2023-11-25 00:04:40,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 12:04:40" (1/1) ... [2023-11-25 00:04:40,950 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-25 00:04:41,232 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-25 00:04:41,241 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-25 00:04:41,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:41,351 INFO L202 MainTranslator]: Completed pre-run [2023-11-25 00:04:41,370 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[1999,2012] [2023-11-25 00:04:41,373 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_0dbed06e-c707-411b-9691-07da6e726dd3/sv-benchmarks/c/combinations/square_4+soft_float_4-2a.c.cil.c[2393,2406] [2023-11-25 00:04:41,408 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-25 00:04:41,441 INFO L206 MainTranslator]: Completed translation [2023-11-25 00:04:41,442 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41 WrapperNode [2023-11-25 00:04:41,442 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-25 00:04:41,444 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:41,444 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-25 00:04:41,444 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-25 00:04:41,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,521 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2023-11-25 00:04:41,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-25 00:04:41,523 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-25 00:04:41,524 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-25 00:04:41,524 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-25 00:04:41,537 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,562 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,563 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,578 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,591 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-25 00:04:41,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-25 00:04:41,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-25 00:04:41,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-25 00:04:41,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (1/1) ... [2023-11-25 00:04:41,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-25 00:04:41,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-25 00:04:41,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-25 00:04:41,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-25 00:04:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-25 00:04:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-25 00:04:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-25 00:04:41,764 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-25 00:04:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2023-11-25 00:04:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2023-11-25 00:04:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-25 00:04:41,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-25 00:04:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-25 00:04:41,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-25 00:04:41,879 INFO L241 CfgBuilder]: Building ICFG [2023-11-25 00:04:41,883 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-25 00:04:44,458 INFO L282 CfgBuilder]: Performing block encoding [2023-11-25 00:04:44,490 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-25 00:04:44,490 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-25 00:04:44,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:44 BoogieIcfgContainer [2023-11-25 00:04:44,491 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-25 00:04:44,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-25 00:04:44,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-25 00:04:44,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-25 00:04:44,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 12:04:40" (1/3) ... [2023-11-25 00:04:44,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e6d0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:44, skipping insertion in model container [2023-11-25 00:04:44,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 12:04:41" (2/3) ... [2023-11-25 00:04:44,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e6d0e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 12:04:44, skipping insertion in model container [2023-11-25 00:04:44,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 12:04:44" (3/3) ... [2023-11-25 00:04:44,501 INFO L112 eAbstractionObserver]: Analyzing ICFG square_4+soft_float_4-2a.c.cil.c [2023-11-25 00:04:44,522 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-25 00:04:44,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-25 00:04:44,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-25 00:04:44,581 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;@30653549, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-25 00:04:44,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-25 00:04:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-25 00:04:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:04:44,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:44,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-25 00:04:44,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:44,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2097064236, now seen corresponding path program 1 times [2023-11-25 00:04:44,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:04:44,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562403256] [2023-11-25 00:04:44,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:44,618 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 [2023-11-25 00:04:44,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:04:44,624 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:04:44,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:04:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-25 00:04:45,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-25 00:04:45,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-25 00:04:45,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-25 00:04:45,181 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-25 00:04:45,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-25 00:04:45,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562403256] [2023-11-25 00:04:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562403256] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-25 00:04:45,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-25 00:04:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-25 00:04:45,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688513638] [2023-11-25 00:04:45,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-25 00:04:45,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-25 00:04:45,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-25 00:04:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-25 00:04:45,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:04:45,217 INFO L87 Difference]: Start difference. First operand has 57 states, 43 states have (on average 1.558139534883721) internal successors, (67), 45 states have internal predecessors, (67), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:45,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-25 00:04:45,277 INFO L93 Difference]: Finished difference Result 110 states and 167 transitions. [2023-11-25 00:04:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-25 00:04:45,281 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-25 00:04:45,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-25 00:04:45,294 INFO L225 Difference]: With dead ends: 110 [2023-11-25 00:04:45,294 INFO L226 Difference]: Without dead ends: 53 [2023-11-25 00:04:45,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-25 00:04:45,306 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-25 00:04:45,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-25 00:04:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-25 00:04:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-25 00:04:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.375) internal successors, (55), 42 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-25 00:04:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2023-11-25 00:04:45,374 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 6 [2023-11-25 00:04:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-25 00:04:45,375 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2023-11-25 00:04:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-25 00:04:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2023-11-25 00:04:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-25 00:04:45,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-25 00:04:45,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-25 00:04:45,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:04:45,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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 [2023-11-25 00:04:45,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-25 00:04:45,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-25 00:04:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2097123818, now seen corresponding path program 1 times [2023-11-25 00:04:45,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-25 00:04:45,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952958506] [2023-11-25 00:04:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-25 00:04:45,596 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 [2023-11-25 00:04:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/mathsat [2023-11-25 00:04:45,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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) [2023-11-25 00:04:45,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0dbed06e-c707-411b-9691-07da6e726dd3/bin/utaipan-verify-SwPr7d2a91/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