./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 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --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 0.2.1-dev-63182f1 [2021-11-12 23:40:13,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:13,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:14,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:14,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:14,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:14,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:14,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:14,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:14,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:14,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:14,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:14,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:14,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:14,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:14,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:14,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:14,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:14,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:14,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:14,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:14,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:14,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:14,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:14,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:14,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:14,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:14,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:14,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:14,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:14,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:14,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:14,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:14,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:14,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:14,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:14,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:14,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:14,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:14,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:14,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:14,067 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:40:14,117 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:14,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:14,119 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:14,119 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:14,119 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:14,119 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:14,120 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:14,120 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:40:14,126 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:14,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:14,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:40:14,128 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:40:14,128 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:14,128 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:40:14,128 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:40:14,128 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:40:14,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:14,129 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:40:14,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:40:14,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:40:14,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:14,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:14,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:14,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:14,131 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:14,131 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:40:14,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:14,131 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:14,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:14,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:14,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:14,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:14,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:14,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:14,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:14,135 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:40:14,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:40:14,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:14,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:14,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:14,136 INFO L138 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_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-11-12 23:40:14,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:14,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:14,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:14,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:14,435 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:14,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-12 23:40:14,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/4edd6189a/b3808ad861f04392a70e3284c495908b/FLAGee6763f05 [2021-11-12 23:40:14,887 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:14,888 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-12 23:40:14,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/4edd6189a/b3808ad861f04392a70e3284c495908b/FLAGee6763f05 [2021-11-12 23:40:15,306 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/4edd6189a/b3808ad861f04392a70e3284c495908b [2021-11-12 23:40:15,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:15,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:15,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:15,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:15,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:15,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c9cf394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15, skipping insertion in model container [2021-11-12 23:40:15,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:15,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:15,530 WARN L228 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_c87a6894-59bc-434b-83ec-f66f5baa5a34/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-12 23:40:15,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:15,565 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:40:15,575 WARN L228 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_c87a6894-59bc-434b-83ec-f66f5baa5a34/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-12 23:40:15,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:15,607 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:40:15,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15 WrapperNode [2021-11-12 23:40:15,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:15,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:15,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:40:15,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:40:15,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:15,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:40:15,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:40:15,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:40:15,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,677 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:40:15,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:40:15,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:40:15,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:40:15,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (1/1) ... [2021-11-12 23:40:15,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:15,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:40:15,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:40:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:40:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:40:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-12 23:40:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-12 23:40:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:40:15,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:40:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-12 23:40:16,364 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:40:16,368 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:40:16,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:16 BoogieIcfgContainer [2021-11-12 23:40:16,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:40:16,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:40:16,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:40:16,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:40:16,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:40:15" (1/3) ... [2021-11-12 23:40:16,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c91648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:16, skipping insertion in model container [2021-11-12 23:40:16,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:15" (2/3) ... [2021-11-12 23:40:16,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38c91648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:16, skipping insertion in model container [2021-11-12 23:40:16,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:16" (3/3) ... [2021-11-12 23:40:16,381 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-11-12 23:40:16,387 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:40:16,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:40:16,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:40:16,472 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:40:16,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:40:16,489 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) [2021-11-12 23:40:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-12 23:40:16,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:16,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-12 23:40:16,495 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash 2597808, now seen corresponding path program 1 times [2021-11-12 23:40:16,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:40:16,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087829148] [2021-11-12 23:40:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:16,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:40:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:40:16,944 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:40:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:40:17,163 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 23:40:17,169 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:40:17,170 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:40:17,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:40:17,177 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-12 23:40:17,180 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:40:17,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 11:40:17 BoogieIcfgContainer [2021-11-12 23:40:17,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 23:40:17,248 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 23:40:17,248 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 23:40:17,249 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 23:40:17,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:16" (3/4) ... [2021-11-12 23:40:17,254 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 23:40:17,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 23:40:17,257 INFO L158 Benchmark]: Toolchain (without parser) took 1947.06ms. Allocated memory is still 117.4MB. Free memory was 75.6MB in the beginning and 60.3MB in the end (delta: 15.3MB). Peak memory consumption was 14.1MB. Max. memory is 16.1GB. [2021-11-12 23:40:17,258 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 92.2MB in the end (delta: 65.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:40:17,260 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.36ms. Allocated memory is still 117.4MB. Free memory was 75.4MB in the beginning and 91.3MB in the end (delta: -15.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 23:40:17,262 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.38ms. Allocated memory is still 117.4MB. Free memory was 91.3MB in the beginning and 89.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:40:17,267 INFO L158 Benchmark]: Boogie Preprocessor took 32.15ms. Allocated memory is still 117.4MB. Free memory was 89.2MB in the beginning and 87.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 23:40:17,268 INFO L158 Benchmark]: RCFGBuilder took 688.17ms. Allocated memory is still 117.4MB. Free memory was 87.8MB in the beginning and 64.1MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-12 23:40:17,270 INFO L158 Benchmark]: TraceAbstraction took 871.77ms. Allocated memory is still 117.4MB. Free memory was 63.8MB in the beginning and 60.9MB in the end (delta: 2.9MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2021-11-12 23:40:17,271 INFO L158 Benchmark]: Witness Printer took 7.87ms. Allocated memory is still 117.4MB. Free memory was 60.9MB in the beginning and 60.3MB in the end (delta: 544.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:40:17,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 117.4MB. Free memory was 92.3MB in the beginning and 92.2MB in the end (delta: 65.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.36ms. Allocated memory is still 117.4MB. Free memory was 75.4MB in the beginning and 91.3MB in the end (delta: -15.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.38ms. Allocated memory is still 117.4MB. Free memory was 91.3MB in the beginning and 89.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.15ms. Allocated memory is still 117.4MB. Free memory was 89.2MB in the beginning and 87.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 688.17ms. Allocated memory is still 117.4MB. Free memory was 87.8MB in the beginning and 64.1MB in the end (delta: 23.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 871.77ms. Allocated memory is still 117.4MB. Free memory was 63.8MB in the beginning and 60.9MB in the end (delta: 2.9MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. * Witness Printer took 7.87ms. Allocated memory is still 117.4MB. Free memory was 60.9MB in the beginning and 60.3MB in the end (delta: 544.6kB). 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: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that 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={11:0}, A2={9:0}, b1={3:0}, b2={7:0}, D1={17:0}, D2={5:0}, P={10:0}, X={15:0}] [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] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) [L13] COND TRUE !(cond) VAL [\old(cond)=0, A1={11:0}, A2={9:0}, b1={3:0}, b2={7:0}, cond=0, D1={17:0}, D2={5:0}, P={10:0}, X={15:0}] [L13] reach_error() VAL [\old(cond)=0, A1={11:0}, A2={9:0}, b1={3:0}, b2={7:0}, cond=0, D1={17:0}, D2={5:0}, P={10:0}, X={15:0}] - 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, PartialOrderReductionTime: 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, 0.4s 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 [2021-11-12 23:40:17,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --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 0.2.1-dev-63182f1 [2021-11-12 23:40:19,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:40:19,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:40:19,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:40:19,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:40:19,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:40:19,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:40:19,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:40:19,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:40:19,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:40:19,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:40:19,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:40:19,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:40:19,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:40:19,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:40:19,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:40:19,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:40:19,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:40:19,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:40:19,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:40:19,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:40:19,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:40:19,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:40:19,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:40:19,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:40:19,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:40:19,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:40:19,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:40:19,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:40:19,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:40:19,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:40:19,952 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:40:19,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:40:19,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:40:19,955 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:40:19,955 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:40:19,956 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:40:19,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:40:19,957 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:40:19,958 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:40:19,959 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:40:19,960 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:40:19,989 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:40:19,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:40:19,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:40:19,991 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:40:19,991 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:40:19,992 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:40:19,992 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:40:19,992 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:40:19,992 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:40:19,993 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:40:19,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:40:19,994 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:40:19,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:40:19,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:40:19,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:40:19,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:40:19,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:40:19,995 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:40:19,996 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:40:19,996 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:40:19,996 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:40:19,996 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:40:19,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:40:19,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:40:19,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:40:19,997 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:40:19,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:40:19,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:19,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:40:19,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:40:19,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:40:19,999 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:40:19,999 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:19,999 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:40:20,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:40:20,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:40:20,000 INFO L138 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_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-11-12 23:40:20,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:40:20,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:40:20,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:40:20,459 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:40:20,459 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:40:20,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-12 23:40:20,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/86baaeab6/ef3301622218487f9e99b8f2945c5c19/FLAG62e846b83 [2021-11-12 23:40:21,094 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:40:21,098 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-12 23:40:21,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/86baaeab6/ef3301622218487f9e99b8f2945c5c19/FLAG62e846b83 [2021-11-12 23:40:21,425 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/data/86baaeab6/ef3301622218487f9e99b8f2945c5c19 [2021-11-12 23:40:21,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:40:21,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:40:21,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:21,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:40:21,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:40:21,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff21ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21, skipping insertion in model container [2021-11-12 23:40:21,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:40:21,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:40:21,633 WARN L228 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_c87a6894-59bc-434b-83ec-f66f5baa5a34/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-12 23:40:21,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:21,685 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:40:21,702 WARN L228 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_c87a6894-59bc-434b-83ec-f66f5baa5a34/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-12 23:40:21,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:40:21,766 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:40:21,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21 WrapperNode [2021-11-12 23:40:21,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:40:21,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:21,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:40:21,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:40:21,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:40:21,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:40:21,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:40:21,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:40:21,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:40:21,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:40:21,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:40:21,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:40:21,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (1/1) ... [2021-11-12 23:40:21,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:40:21,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:21,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:40:21,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:40:21,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-12 23:40:21,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-12 23:40:21,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:40:21,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:40:21,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2021-11-12 23:40:21,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:40:21,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:40:25,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:40:25,400 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:40:25,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:25 BoogieIcfgContainer [2021-11-12 23:40:25,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:40:25,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:40:25,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:40:25,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:40:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:40:21" (1/3) ... [2021-11-12 23:40:25,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147435c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:25, skipping insertion in model container [2021-11-12 23:40:25,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:40:21" (2/3) ... [2021-11-12 23:40:25,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147435c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:40:25, skipping insertion in model container [2021-11-12 23:40:25,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:40:25" (3/3) ... [2021-11-12 23:40:25,415 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-11-12 23:40:25,423 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:40:25,423 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:40:25,501 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:40:25,517 INFO L339 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=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:40:25,517 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:40:25,531 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) [2021-11-12 23:40:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:40:25,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:25,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:25,538 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:25,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1398280527, now seen corresponding path program 1 times [2021-11-12 23:40:25,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:25,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677903335] [2021-11-12 23:40:25,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:25,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:25,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:25,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:40:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:40:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:29,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:29,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:29,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677903335] [2021-11-12 23:40:29,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677903335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:29,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:29,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:40:29,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584094896] [2021-11-12 23:40:29,144 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:29,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:40:29,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:29,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:40:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:40:29,185 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) [2021-11-12 23:40:29,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:29,199 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-12 23:40:29,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:40:29,202 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 [2021-11-12 23:40:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:29,210 INFO L225 Difference]: With dead ends: 30 [2021-11-12 23:40:29,210 INFO L226 Difference]: Without dead ends: 14 [2021-11-12 23:40:29,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:40:29,224 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:29,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:40:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-12 23:40:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-12 23:40:29,254 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) [2021-11-12 23:40:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-12 23:40:29,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-11-12 23:40:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:29,263 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-12 23:40:29,263 INFO L471 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) [2021-11-12 23:40:29,264 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-12 23:40:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:40:29,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:29,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:29,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:29,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:29,465 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:29,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:29,467 INFO L85 PathProgramCache]: Analyzing trace with hash 376726835, now seen corresponding path program 1 times [2021-11-12 23:40:29,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:29,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85343762] [2021-11-12 23:40:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:29,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:29,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:29,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:29,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:40:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:33,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:40:33,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:33,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85343762] [2021-11-12 23:40:33,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85343762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:33,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:33,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 23:40:33,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906979911] [2021-11-12 23:40:33,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:33,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:40:33,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:33,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:40:33,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:40:33,191 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) [2021-11-12 23:40:36,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.99s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:36,429 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-12 23:40:36,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:40:36,797 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 [2021-11-12 23:40:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:36,798 INFO L225 Difference]: With dead ends: 28 [2021-11-12 23:40:36,798 INFO L226 Difference]: Without dead ends: 14 [2021-11-12 23:40:36,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:40:36,800 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3120.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3127.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:36,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 8 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 3127.73ms Time] [2021-11-12 23:40:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-12 23:40:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-12 23:40:36,805 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) [2021-11-12 23:40:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-12 23:40:36,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-11-12 23:40:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:36,806 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-12 23:40:36,807 INFO L471 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) [2021-11-12 23:40:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-12 23:40:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-12 23:40:36,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:36,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:40:36,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:37,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:37,009 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -303331535, now seen corresponding path program 1 times [2021-11-12 23:40:37,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:37,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194042550] [2021-11-12 23:40:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:37,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:37,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:37,013 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:37,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:45:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:45:42,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-12 23:45:42,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:45:44,237 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-12 23:45:44,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2286 treesize of output 2204 [2021-11-12 23:45:53,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:53,997 INFO L244 Elim1Store]: Index analysis took 170 ms [2021-11-12 23:45:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:45:54,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:54,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:45:57,795 INFO L354 Elim1Store]: treesize reduction 1088, result has 10.4 percent of original size [2021-11-12 23:45:57,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 24 select indices, 24 select index equivalence classes, 20 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 253 case distinctions, treesize of input 609 treesize of output 550 [2021-11-12 23:46:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:03,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:03,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:03,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,558 INFO L244 Elim1Store]: Index analysis took 846 ms [2021-11-12 23:46:04,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:04,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:06,209 INFO L354 Elim1Store]: treesize reduction 552, result has 12.8 percent of original size [2021-11-12 23:46:06,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 27 select indices, 27 select index equivalence classes, 28 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 242 case distinctions, treesize of input 428 treesize of output 509 [2021-11-12 23:46:13,828 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 320 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:46:22,383 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification that was a NOOP. DAG size: 321 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:46:31,282 WARN L227 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 322 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:46:39,866 WARN L227 SmtUtils]: Spent 5.59s on a formula simplification that was a NOOP. DAG size: 315 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:46:41,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:41,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-12 23:46:41,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:46:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-12 23:50:25,204 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-12 23:50:25,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:50:25,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194042550] [2021-11-12 23:50:25,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-12 23:50:25,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1452220238] [2021-11-12 23:50:25,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:50:25,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:50:25,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:50:25,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-12 23:50:25,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:50:25,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c87a6894-59bc-434b-83ec-f66f5baa5a34/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process