./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/filter_iir.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2 --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 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:25:54,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:54,790 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:25:54,796 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:54,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:54,824 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:54,825 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:54,825 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:54,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:54,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:54,827 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:54,827 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:54,827 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:54,828 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:54,828 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:54,829 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:54,829 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:54,830 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:54,830 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:54,830 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:54,831 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:54,831 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:54,832 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:54,832 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:25:54,833 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:25:54,833 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:54,834 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:25:54,834 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:54,842 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:25:54,842 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:54,842 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:25:54,843 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:54,843 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:25:54,843 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:25:54,844 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:54,844 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:54,845 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:54,848 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:54,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:54,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:54,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:54,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:25:54,851 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:54,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:54,852 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:54,852 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:54,852 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:54,852 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2024-11-02 11:25:55,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:55,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:55,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:55,187 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:55,187 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:55,189 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/float-benchs/filter_iir.c Unable to find full path for "g++" [2024-11-02 11:25:57,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:25:57,529 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:25:57,532 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/sv-benchmarks/c/float-benchs/filter_iir.c [2024-11-02 11:25:57,544 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data/0c7d1ef6f/f1493938060c40d583a2d9f0b290f222/FLAG527132c6e [2024-11-02 11:25:57,575 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data/0c7d1ef6f/f1493938060c40d583a2d9f0b290f222 [2024-11-02 11:25:57,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:25:57,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:25:57,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:57,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:25:57,591 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:25:57,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,593 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74a7bd91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:57, skipping insertion in model container [2024-11-02 11:25:57,594 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:57" (1/1) ... [2024-11-02 11:25:57,632 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:25:57,877 WARN L251 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2024-11-02 11:25:57,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:57,938 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:25:57,960 WARN L251 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2024-11-02 11:25:57,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:58,006 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:25:58,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58 WrapperNode [2024-11-02 11:25:58,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:58,009 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:58,009 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:25:58,009 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:25:58,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,033 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,069 INFO L138 Inliner]: procedures = 18, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 140 [2024-11-02 11:25:58,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:58,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:25:58,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:25:58,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:25:58,090 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,096 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,096 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,119 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:25:58,124 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:25:58,124 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:25:58,124 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:25:58,129 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (1/1) ... [2024-11-02 11:25:58,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:58,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:58,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:25:58,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:25:58,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:25:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:25:58,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2024-11-02 11:25:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2024-11-02 11:25:58,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:25:58,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:25:58,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2024-11-02 11:25:58,369 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:25:58,373 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:25:58,719 INFO L? ?]: Removed 23 outVars from TransFormulas that were not future-live. [2024-11-02 11:25:58,720 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:25:58,888 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:25:58,888 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 11:25:58,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:58 BoogieIcfgContainer [2024-11-02 11:25:58,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:25:58,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:25:58,893 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:25:58,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:25:58,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:57" (1/3) ... [2024-11-02 11:25:58,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b43f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:58, skipping insertion in model container [2024-11-02 11:25:58,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:58" (2/3) ... [2024-11-02 11:25:58,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b43f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:58, skipping insertion in model container [2024-11-02 11:25:58,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:58" (3/3) ... [2024-11-02 11:25:58,905 INFO L112 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2024-11-02 11:25:58,941 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:25:58,942 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:25:59,104 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:25:59,123 INFO L333 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, 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;@6b341312, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:25:59,124 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:25:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-02 11:25:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 11:25:59,151 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:59,152 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 11:25:59,156 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:59,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:59,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2597808, now seen corresponding path program 1 times [2024-11-02 11:25:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:59,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728911284] [2024-11-02 11:25:59,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:59,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 11:25:59,630 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-02 11:25:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 11:25:59,772 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-02 11:25:59,775 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-02 11:25:59,777 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-02 11:25:59,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:25:59,784 INFO L407 BasicCegarLoop]: Path program histogram: [1] [2024-11-02 11:25:59,816 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-02 11:25:59,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 11:25:59 BoogieIcfgContainer [2024-11-02 11:25:59,824 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-02 11:25:59,825 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-02 11:25:59,825 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-02 11:25:59,825 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-02 11:25:59,826 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:58" (3/4) ... [2024-11-02 11:25:59,831 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-02 11:25:59,832 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-02 11:25:59,834 INFO L158 Benchmark]: Toolchain (without parser) took 2253.42ms. Allocated memory is still 123.7MB. Free memory was 93.4MB in the beginning and 72.7MB in the end (delta: 20.7MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2024-11-02 11:25:59,835 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 123.7MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 11:25:59,836 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.48ms. Allocated memory is still 123.7MB. Free memory was 93.4MB in the beginning and 79.9MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-02 11:25:59,836 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.09ms. Allocated memory is still 123.7MB. Free memory was 79.6MB in the beginning and 77.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 11:25:59,837 INFO L158 Benchmark]: Boogie Preprocessor took 49.16ms. Allocated memory is still 123.7MB. Free memory was 77.5MB in the beginning and 75.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 11:25:59,838 INFO L158 Benchmark]: RCFGBuilder took 765.28ms. Allocated memory is still 123.7MB. Free memory was 75.8MB in the beginning and 56.5MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-02 11:25:59,840 INFO L158 Benchmark]: TraceAbstraction took 931.37ms. Allocated memory is still 123.7MB. Free memory was 55.8MB in the beginning and 73.1MB in the end (delta: -17.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 11:25:59,842 INFO L158 Benchmark]: Witness Printer took 7.06ms. Allocated memory is still 123.7MB. Free memory was 72.7MB in the beginning and 72.7MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 11:25:59,847 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 123.7MB. Free memory is still 94.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.48ms. Allocated memory is still 123.7MB. Free memory was 93.4MB in the beginning and 79.9MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.09ms. Allocated memory is still 123.7MB. Free memory was 79.6MB in the beginning and 77.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.16ms. Allocated memory is still 123.7MB. Free memory was 77.5MB in the beginning and 75.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 765.28ms. Allocated memory is still 123.7MB. Free memory was 75.8MB in the beginning and 56.5MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 931.37ms. Allocated memory is still 123.7MB. Free memory was 55.8MB in the beginning and 73.1MB in the end (delta: -17.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 7.06ms. Allocated memory is still 123.7MB. Free memory was 72.7MB in the beginning and 72.7MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. 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: 13]: 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 50, overapproximation of to_real at line 16, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L16] double A1[3] = { 1, 0.5179422053046, 1.0 }; [L17] double b1[2] = { 1.470767736573, 0.5522073405779 }; [L18] double A2[3] = { 1, 1.633101801841, 1.0 }; [L19] double b2[2] = { 1.742319554830, 0.820939679242 }; [L21] double D1[2], D2[2]; [L22] double P, X; [L43] D1[0] = 0. [L43] D1[1] = 0. [L44] D2[0] = 0. [L44] D2[1] = 0. [L45] P = 0. VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}] [L47] COND TRUE 1 [L49] X = __VERIFIER_nondet_double() [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] CALL assume_abort_if_not(X >= -10. && X <= 10.) [L11] COND FALSE !(!cond) [L50] RET assume_abort_if_not(X >= -10. && X <= 10.) [L52] CALL iir4(&X, &P) [L26] double x1, y1, t1, t2; [L28] EXPR \read(*x) [L28] x1 = 0.0117749388721091 * *x [L30] EXPR b1[0] [L30] EXPR D1[0] [L30] EXPR b1[1] [L30] EXPR D1[1] [L30] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L31] EXPR A1[0] [L31] EXPR A1[1] [L31] EXPR D1[0] [L31] EXPR A1[2] [L31] EXPR D1[1] [L31] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L32] EXPR D1[0] [L32] D1[1] = D1[0] [L33] D1[0] = t1 [L35] EXPR b2[0] [L35] EXPR D2[0] [L35] EXPR b2[1] [L35] EXPR D2[1] [L35] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L36] EXPR A2[0] [L36] EXPR A2[1] [L36] EXPR D2[0] [L36] EXPR A2[2] [L36] EXPR D2[1] [L36] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L37] EXPR D2[0] [L37] D2[1] = D2[0] [L38] D2[0] = t2 [L52] RET iir4(&X, &P) [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) [L13] COND TRUE !(cond) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}] [L13] reach_error() VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, 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=7occurred 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, 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 [2024-11-02 11:25:59,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2 --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 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:26:02,439 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:26:02,559 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2024-11-02 11:26:02,569 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:26:02,570 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:26:02,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:26:02,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:26:02,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:26:02,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:26:02,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:26:02,623 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:26:02,623 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:26:02,624 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:26:02,625 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:26:02,626 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:26:02,628 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:26:02,629 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:26:02,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:26:02,630 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:26:02,630 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:26:02,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:26:02,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:26:02,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:26:02,636 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:26:02,636 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-02 11:26:02,636 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-02 11:26:02,636 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:26:02,637 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-02 11:26:02,637 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:26:02,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:26:02,638 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:26:02,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:26:02,639 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-02 11:26:02,639 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:26:02,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:26:02,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:26:02,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:26:02,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:26:02,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:26:02,641 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-02 11:26:02,641 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-02 11:26:02,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:26:02,642 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:26:02,643 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:26:02,643 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2024-11-02 11:26:03,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:26:03,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:26:03,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:26:03,105 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:26:03,106 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:26:03,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/float-benchs/filter_iir.c Unable to find full path for "g++" [2024-11-02 11:26:05,202 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:26:05,491 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:26:05,492 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/sv-benchmarks/c/float-benchs/filter_iir.c [2024-11-02 11:26:05,502 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data/ed4a9631b/0f41d18dff6249b7a95bac6277f4d574/FLAG0c9812176 [2024-11-02 11:26:05,776 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/data/ed4a9631b/0f41d18dff6249b7a95bac6277f4d574 [2024-11-02 11:26:05,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:26:05,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:26:05,783 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:05,783 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:26:05,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:26:05,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:05" (1/1) ... [2024-11-02 11:26:05,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a2778e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:05, skipping insertion in model container [2024-11-02 11:26:05,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:05" (1/1) ... [2024-11-02 11:26:05,826 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:26:06,090 WARN L251 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2024-11-02 11:26:06,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:06,171 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:26:06,191 WARN L251 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_6c430efb-0ba2-4983-8422-ddcf2bb87998/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2024-11-02 11:26:06,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:06,257 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:26:06,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06 WrapperNode [2024-11-02 11:26:06,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:06,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:06,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:26:06,260 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:26:06,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,286 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,336 INFO L138 Inliner]: procedures = 19, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 141 [2024-11-02 11:26:06,336 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:06,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:26:06,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:26:06,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:26:06,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,363 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,398 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,403 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:26:06,413 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:26:06,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:26:06,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:26:06,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (1/1) ... [2024-11-02 11:26:06,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:26:06,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:06,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:26:06,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:26:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:26:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2024-11-02 11:26:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2024-11-02 11:26:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-02 11:26:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2024-11-02 11:26:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:26:06,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:26:06,673 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:26:06,676 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:26:09,452 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-02 11:26:09,456 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:26:09,471 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:26:09,471 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 11:26:09,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:09 BoogieIcfgContainer [2024-11-02 11:26:09,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:26:09,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:26:09,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:26:09,477 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:26:09,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:26:05" (1/3) ... [2024-11-02 11:26:09,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8d2f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:09, skipping insertion in model container [2024-11-02 11:26:09,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:06" (2/3) ... [2024-11-02 11:26:09,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8d2f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:09, skipping insertion in model container [2024-11-02 11:26:09,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:09" (3/3) ... [2024-11-02 11:26:09,481 INFO L112 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2024-11-02 11:26:09,500 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:26:09,500 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 11:26:09,607 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:26:09,615 INFO L333 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, 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;@2e1b3182, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:26:09,616 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 11:26:09,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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) [2024-11-02 11:26:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 11:26:09,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:09,629 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:09,629 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:09,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:09,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1398280527, now seen corresponding path program 1 times [2024-11-02 11:26:09,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-02 11:26:09,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027467832] [2024-11-02 11:26:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:09,657 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 [2024-11-02 11:26:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/mathsat [2024-11-02 11:26:09,662 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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) [2024-11-02 11:26:09,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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 [2024-11-02 11:26:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:13,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-02 11:26:13,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:13,747 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:26:13,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-02 11:26:13,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027467832] [2024-11-02 11:26:13,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027467832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:13,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:13,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 11:26:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003172439] [2024-11-02 11:26:13,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:13,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-02 11:26:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-02 11:26:13,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-02 11:26:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 11:26:13,782 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-02 11:26:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:13,796 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2024-11-02 11:26:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-02 11:26:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2024-11-02 11:26:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:13,806 INFO L225 Difference]: With dead ends: 30 [2024-11-02 11:26:13,806 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 11:26:13,809 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-02 11:26:13,813 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:13,814 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 11:26:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 11:26:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-02 11:26:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2024-11-02 11:26:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-11-02 11:26:13,849 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2024-11-02 11:26:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:13,851 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-11-02 11:26:13,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-02 11:26:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-02 11:26:13,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 11:26:13,852 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:13,853 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:13,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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 [2024-11-02 11:26:14,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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 [2024-11-02 11:26:14,054 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:14,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash 376726835, now seen corresponding path program 1 times [2024-11-02 11:26:14,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-02 11:26:14,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837370524] [2024-11-02 11:26:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:14,056 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 [2024-11-02 11:26:14,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/mathsat [2024-11-02 11:26:14,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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) [2024-11-02 11:26:14,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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 [2024-11-02 11:26:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:17,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 11:26:17,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:17,499 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:26:17,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-02 11:26:17,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837370524] [2024-11-02 11:26:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837370524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:17,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:17,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:26:17,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810569984] [2024-11-02 11:26:17,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:17,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:26:17,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-02 11:26:17,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:26:17,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:17,509 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-02 11:26:20,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 11:26:22,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 11:26:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:22,902 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-11-02 11:26:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:26:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2024-11-02 11:26:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:23,205 INFO L225 Difference]: With dead ends: 28 [2024-11-02 11:26:23,205 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 11:26:23,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:23,207 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:23,208 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2024-11-02 11:26:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 11:26:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-02 11:26:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2024-11-02 11:26:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-11-02 11:26:23,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2024-11-02 11:26:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:23,213 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-11-02 11:26:23,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-02 11:26:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-11-02 11:26:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 11:26:23,215 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:23,215 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:26:23,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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 [2024-11-02 11:26:23,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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 [2024-11-02 11:26:23,416 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:23,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash -303331535, now seen corresponding path program 1 times [2024-11-02 11:26:23,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-02 11:26:23,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172256013] [2024-11-02 11:26:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:23,418 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 [2024-11-02 11:26:23,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/mathsat [2024-11-02 11:26:23,422 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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) [2024-11-02 11:26:23,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c430efb-0ba2-4983-8422-ddcf2bb87998/bin/utaipan-verify-DbMuA5NWw2/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