./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 14:57:28,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:57:28,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:57:28,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:57:28,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:57:28,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:57:28,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:57:28,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:57:28,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:57:28,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:57:28,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:57:28,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:57:28,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:57:28,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:57:29,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:57:29,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:57:29,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:57:29,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:57:29,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:57:29,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:57:29,029 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:57:29,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:57:29,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:57:29,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:57:29,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:57:29,049 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:57:29,049 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:57:29,052 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:57:29,053 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:57:29,054 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:57:29,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:57:29,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:57:29,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:57:29,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:57:29,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:57:29,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:57:29,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:57:29,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:57:29,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:57:29,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:57:29,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:57:29,068 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:57:29,124 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:57:29,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:57:29,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:57:29,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:57:29,127 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:57:29,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:57:29,128 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:57:29,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:57:29,128 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:57:29,128 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:57:29,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:57:29,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:57:29,131 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:57:29,131 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:57:29,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:57:29,132 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:57:29,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:57:29,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:57:29,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:57:29,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:57:29,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:57:29,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:57:29,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:57:29,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:57:29,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:57:29,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:57:29,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:57:29,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:57:29,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:57:29,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:57:29,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:57:29,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:57:29,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:57:29,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:57:29,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:57:29,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:57:29,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:57:29,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:57:29,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:57:29,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:57:29,140 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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-11-19 14:57:29,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:57:29,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:57:29,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:57:29,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:57:29,547 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:57:29,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-19 14:57:29,638 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/9fb5856c9/553010cdfe9a419c8591a7d4ce1cf32b/FLAG2c55d13dc [2021-11-19 14:57:30,155 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:57:30,156 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-19 14:57:30,164 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/9fb5856c9/553010cdfe9a419c8591a7d4ce1cf32b/FLAG2c55d13dc [2021-11-19 14:57:30,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/9fb5856c9/553010cdfe9a419c8591a7d4ce1cf32b [2021-11-19 14:57:30,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:57:30,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:57:30,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:57:30,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:57:30,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:57:30,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74ac7f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30, skipping insertion in model container [2021-11-19 14:57:30,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:57:30,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:57:30,757 WARN L230 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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-19 14:57:30,790 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:30,803 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:57:30,817 WARN L230 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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-19 14:57:30,835 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:30,857 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:57:30,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30 WrapperNode [2021-11-19 14:57:30,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:57:30,859 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:30,859 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:57:30,859 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:57:30,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,939 INFO L137 Inliner]: procedures = 19, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 132 [2021-11-19 14:57:30,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:30,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:57:30,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:57:30,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:57:30,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:57:30,977 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:57:30,977 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:57:30,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:57:30,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (1/1) ... [2021-11-19 14:57:30,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:57:31,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:31,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:57:31,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:57:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:57:31,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:57:31,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:57:31,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-11-19 14:57:31,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-19 14:57:31,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:57:31,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:57:31,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2021-11-19 14:57:31,162 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:57:31,165 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:57:31,510 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:57:31,685 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:57:31,686 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:57:31,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:31 BoogieIcfgContainer [2021-11-19 14:57:31,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:57:31,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:57:31,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:57:31,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:57:31,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:57:30" (1/3) ... [2021-11-19 14:57:31,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f6438e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:31, skipping insertion in model container [2021-11-19 14:57:31,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:30" (2/3) ... [2021-11-19 14:57:31,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f6438e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:31, skipping insertion in model container [2021-11-19 14:57:31,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:31" (3/3) ... [2021-11-19 14:57:31,704 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-11-19 14:57:31,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:57:31,711 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:57:31,789 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:57:31,802 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 [2021-11-19 14:57:31,803 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:57:31,834 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) [2021-11-19 14:57:31,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:57:31,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:31,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:57:31,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:31,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:31,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2597808, now seen corresponding path program 1 times [2021-11-19 14:57:31,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:57:31,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380940924] [2021-11-19 14:57:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:31,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:57:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:57:32,318 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:57:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:57:32,533 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:57:32,535 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:57:32,536 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-19 14:57:32,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:57:32,544 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-19 14:57:32,548 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:57:32,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:57:32 BoogieIcfgContainer [2021-11-19 14:57:32,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:57:32,588 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:57:32,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:57:32,589 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:57:32,589 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:31" (3/4) ... [2021-11-19 14:57:32,593 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-19 14:57:32,593 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:57:32,595 INFO L158 Benchmark]: Toolchain (without parser) took 2084.86ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 51.2MB in the beginning and 49.2MB in the end (delta: 2.0MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2021-11-19 14:57:32,596 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 67.5MB in the beginning and 67.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:57:32,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.29ms. Allocated memory is still 92.3MB. Free memory was 51.0MB in the beginning and 65.8MB in the end (delta: -14.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-19 14:57:32,598 INFO L158 Benchmark]: Boogie Procedure Inliner took 80.60ms. Allocated memory is still 92.3MB. Free memory was 65.8MB in the beginning and 63.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:57:32,598 INFO L158 Benchmark]: Boogie Preprocessor took 35.63ms. Allocated memory is still 92.3MB. Free memory was 63.7MB in the beginning and 62.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:57:32,599 INFO L158 Benchmark]: RCFGBuilder took 711.86ms. Allocated memory is still 92.3MB. Free memory was 62.3MB in the beginning and 41.0MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-19 14:57:32,600 INFO L158 Benchmark]: TraceAbstraction took 897.09ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 40.3MB in the beginning and 49.2MB in the end (delta: -8.9MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. [2021-11-19 14:57:32,601 INFO L158 Benchmark]: Witness Printer took 5.03ms. Allocated memory is still 113.2MB. Free memory is still 49.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:57:32,605 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 67.5MB in the beginning and 67.4MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 346.29ms. Allocated memory is still 92.3MB. Free memory was 51.0MB in the beginning and 65.8MB in the end (delta: -14.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 80.60ms. Allocated memory is still 92.3MB. Free memory was 65.8MB in the beginning and 63.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.63ms. Allocated memory is still 92.3MB. Free memory was 63.7MB in the beginning and 62.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 711.86ms. Allocated memory is still 92.3MB. Free memory was 62.3MB in the beginning and 41.0MB in the end (delta: 21.3MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 897.09ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 40.3MB in the beginning and 49.2MB in the end (delta: -8.9MB). Peak memory consumption was 14.0MB. Max. memory is 16.1GB. * Witness Printer took 5.03ms. Allocated memory is still 113.2MB. Free memory is still 49.2MB. 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={10:0}, A2={7:0}, b1={4:0}, b2={6:0}, D1={14:0}, D2={5:0}, P={9:0}, X={11:0}] [L47] COND TRUE 1 [L49] X = __VERIFIER_nondet_double() [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] CALL assume_abort_if_not(X >= -10. && X <= 10.) [L11] COND FALSE !(!cond) [L50] RET assume_abort_if_not(X >= -10. && X <= 10.) [L52] CALL iir4(&X, &P) [L26] double x1, y1, t1, t2; [L28] EXPR \read(*x) [L28] x1 = 0.0117749388721091 * *x [L30] EXPR b1[0] [L30] EXPR D1[0] [L30] EXPR b1[1] [L30] EXPR D1[1] [L30] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L31] EXPR A1[0] [L31] EXPR A1[1] [L31] EXPR D1[0] [L31] EXPR A1[2] [L31] EXPR D1[1] [L31] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L32] EXPR D1[0] [L32] D1[1] = D1[0] [L33] D1[0] = t1 [L35] EXPR b2[0] [L35] EXPR D2[0] [L35] EXPR b2[1] [L35] EXPR D2[1] [L35] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L36] EXPR A2[0] [L36] EXPR A2[1] [L36] EXPR D2[0] [L36] EXPR A2[2] [L36] EXPR D2[1] [L36] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L37] EXPR D2[0] [L37] D2[1] = D2[0] [L38] D2[0] = t2 [L52] RET iir4(&X, &P) [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) [L13] COND TRUE !(cond) VAL [\old(cond)=0, A1={10:0}, A2={7:0}, b1={4:0}, b2={6:0}, cond=0, D1={14:0}, D2={5:0}, P={9:0}, X={11:0}] [L13] reach_error() VAL [\old(cond)=0, A1={10:0}, A2={7:0}, b1={4:0}, b2={6:0}, cond=0, D1={14:0}, D2={5:0}, P={9:0}, X={11:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, 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, 0.3s 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 [2021-11-19 14:57:32,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/filter_iir.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs --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-0f8a17c [2021-11-19 14:57:35,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:57:35,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:57:35,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:57:35,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:57:35,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:57:35,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:57:35,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:57:35,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:57:35,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:57:35,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:57:35,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:57:35,687 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:57:35,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:57:35,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:57:35,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:57:35,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:57:35,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:57:35,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:57:35,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:57:35,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:57:35,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:57:35,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:57:35,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:57:35,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:57:35,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:57:35,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:57:35,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:57:35,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:57:35,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:57:35,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:57:35,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:57:35,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:57:35,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:57:35,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:57:35,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:57:35,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:57:35,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:57:35,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:57:35,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:57:35,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:57:35,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:57:35,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:57:35,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:57:35,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:57:35,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:57:35,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:57:35,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:57:35,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:57:35,824 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:57:35,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:57:35,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:57:35,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:57:35,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:57:35,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:57:35,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:57:35,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:57:35,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:57:35,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:57:35,829 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:57:35,829 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:57:35,830 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:57:35,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:57:35,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:57:35,830 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:57:35,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:57:35,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:57:35,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:57:35,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:57:35,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:57:35,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:57:35,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:57:35,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:57:35,833 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:57:35,833 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:57:35,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:57:35,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:57:35,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:57:35,835 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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8140822ac5d36d3dbe917657ea1276e86420f348faa7d4310d2cd40fc22f39e9 [2021-11-19 14:57:36,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:57:36,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:57:36,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:57:36,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:57:36,321 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:57:36,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-19 14:57:36,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/a149feebf/2c4c2592cc7c4a2dbb78201b3fafdc98/FLAGe217fd0d8 [2021-11-19 14:57:37,021 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:57:37,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/sv-benchmarks/c/float-benchs/filter_iir.c [2021-11-19 14:57:37,030 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/a149feebf/2c4c2592cc7c4a2dbb78201b3fafdc98/FLAGe217fd0d8 [2021-11-19 14:57:37,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/data/a149feebf/2c4c2592cc7c4a2dbb78201b3fafdc98 [2021-11-19 14:57:37,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:57:37,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:57:37,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:57:37,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:57:37,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:57:37,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:37,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a1d5e0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37, skipping insertion in model container [2021-11-19 14:57:37,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:37,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:57:37,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:57:37,608 WARN L230 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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-19 14:57:37,669 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:37,701 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:57:37,747 WARN L230 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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/sv-benchmarks/c/float-benchs/filter_iir.c[583,596] [2021-11-19 14:57:37,813 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:57:37,845 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:57:37,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37 WrapperNode [2021-11-19 14:57:37,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:57:37,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:37,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:57:37,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:57:37,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:37,887 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:37,944 INFO L137 Inliner]: procedures = 20, calls = 70, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 133 [2021-11-19 14:57:37,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:57:37,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:57:37,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:57:37,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:57:37,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:37,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:37,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:37,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:38,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:38,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:38,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:38,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:57:38,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:57:38,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:57:38,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:57:38,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (1/1) ... [2021-11-19 14:57:38,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:57:38,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:57:38,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:57:38,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:57:38,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:57:38,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intFLOATTYPE8 [2021-11-19 14:57:38,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2021-11-19 14:57:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:57:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:57:38,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intFLOATTYPE8 [2021-11-19 14:57:38,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:57:38,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:57:38,313 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:57:38,315 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:57:41,359 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:57:41,366 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:57:41,366 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:57:41,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:41 BoogieIcfgContainer [2021-11-19 14:57:41,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:57:41,371 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:57:41,371 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:57:41,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:57:41,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:57:37" (1/3) ... [2021-11-19 14:57:41,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f613a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:41, skipping insertion in model container [2021-11-19 14:57:41,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:57:37" (2/3) ... [2021-11-19 14:57:41,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f613a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:57:41, skipping insertion in model container [2021-11-19 14:57:41,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:57:41" (3/3) ... [2021-11-19 14:57:41,379 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2021-11-19 14:57:41,396 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:57:41,396 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:57:41,490 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:57:41,499 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 [2021-11-19 14:57:41,499 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:57:41,523 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) [2021-11-19 14:57:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:57:41,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:41,531 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:41,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:41,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1398280527, now seen corresponding path program 1 times [2021-11-19 14:57:41,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:41,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825196912] [2021-11-19 14:57:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:41,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:41,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:41,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:57:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:45,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:57:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:45,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:45,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:45,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825196912] [2021-11-19 14:57:45,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825196912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:45,876 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:45,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:57:45,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638867558] [2021-11-19 14:57:45,879 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:45,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:57:45,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:45,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:57:45,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:57:45,920 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) [2021-11-19 14:57:45,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:45,937 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2021-11-19 14:57:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:57:45,939 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 [2021-11-19 14:57:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:45,949 INFO L225 Difference]: With dead ends: 30 [2021-11-19 14:57:45,949 INFO L226 Difference]: Without dead ends: 14 [2021-11-19 14:57:45,953 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 [2021-11-19 14:57:45,957 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:45,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:57:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-19 14:57:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-19 14:57:45,993 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) [2021-11-19 14:57:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-11-19 14:57:45,995 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2021-11-19 14:57:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:45,996 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-11-19 14:57:45,996 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) [2021-11-19 14:57:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-11-19 14:57:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:57:45,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:45,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:46,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 14:57:46,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:46,219 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:46,220 INFO L85 PathProgramCache]: Analyzing trace with hash 376726835, now seen corresponding path program 1 times [2021-11-19 14:57:46,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:46,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169098857] [2021-11-19 14:57:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:46,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:46,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:46,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:46,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:57:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:57:49,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:57:49,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:57:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:50,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:57:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:57:50,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:57:50,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169098857] [2021-11-19 14:57:50,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169098857] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:57:50,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:57:50,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 14:57:50,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921244935] [2021-11-19 14:57:50,499 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:57:50,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:57:50,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:57:50,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:57:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:57:50,503 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) [2021-11-19 14:57:53,844 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:57:53,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:57:53,847 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-19 14:57:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:57:54,226 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 [2021-11-19 14:57:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:57:54,227 INFO L225 Difference]: With dead ends: 28 [2021-11-19 14:57:54,227 INFO L226 Difference]: Without dead ends: 14 [2021-11-19 14:57:54,228 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 [2021-11-19 14:57:54,230 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:57:54,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 14:57:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-19 14:57:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-11-19 14:57:54,234 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) [2021-11-19 14:57:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-19 14:57:54,235 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-11-19 14:57:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:57:54,235 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-19 14:57:54,236 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) [2021-11-19 14:57:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-19 14:57:54,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 14:57:54,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:57:54,237 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:57:54,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 14:57:54,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:57:54,446 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:57:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:57:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash -303331535, now seen corresponding path program 1 times [2021-11-19 14:57:54,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:57:54,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458674511] [2021-11-19 14:57:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:57:54,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:57:54,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:57:54,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:57:54,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:02:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:02:19,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-19 15:02:19,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:02:20,169 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-19 15:02:20,170 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 118 treesize of output 110 [2021-11-19 15:02:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:26,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:26,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,120 INFO L244 Elim1Store]: Index analysis took 182 ms [2021-11-19 15:02:27,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:27,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:31,217 INFO L354 Elim1Store]: treesize reduction 1208, result has 10.7 percent of original size [2021-11-19 15:02:31,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 27 select indices, 27 select index equivalence classes, 25 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 330 case distinctions, treesize of input 639 treesize of output 589 [2021-11-19 15:02:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:37,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,835 INFO L244 Elim1Store]: Index analysis took 1299 ms [2021-11-19 15:02:38,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:38,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:38,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:39,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:02:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:02:40,953 INFO L354 Elim1Store]: treesize reduction 608, result has 11.8 percent of original size [2021-11-19 15:02:40,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 30 select indices, 30 select index equivalence classes, 32 disjoint index pairs (out of 435 index pairs), introduced 30 new quantified variables, introduced 308 case distinctions, treesize of input 458 treesize of output 548 [2021-11-19 15:02:50,265 WARN L227 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 333 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:02:59,800 WARN L227 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 334 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:03:09,569 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification that was a NOOP. DAG size: 335 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:03:18,547 WARN L227 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 15:03:20,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:03:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:03:20,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:03:20,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:07:02,578 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-19 15:07:02,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:07:02,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458674511] [2021-11-19 15:07:02,580 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_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/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") [2021-11-19 15:07:02,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [660768518] [2021-11-19 15:07:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:07:02,581 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:07:02,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:07:02,587 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:07:02,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-19 15:07:02,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 15:10:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:10:50,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-19 15:10:50,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-19 15:10:50,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377790393] [2021-11-19 15:10:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:10:50,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 15:10:50,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:10:50,681 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 15:10:50,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7762bfa-bd58-4f2e-9da6-a07a12ea2582/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process