./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs --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 1d887be7dd2c3278ee87053cbed7506ff3c2170c .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs --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 1d887be7dd2c3278ee87053cbed7506ff3c2170c ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:45:45,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:45:45,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:45:45,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:45:45,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:45:45,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:45:45,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:45:45,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:45:45,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:45:45,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:45:45,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:45:45,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:45:45,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:45:45,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:45:45,265 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:45:45,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:45:45,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:45:45,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:45:45,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:45:45,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:45:45,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:45:45,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:45:45,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:45:45,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:45:45,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:45:45,312 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:45:45,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:45:45,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:45:45,316 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:45:45,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:45:45,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:45:45,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:45:45,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:45:45,324 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:45:45,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:45:45,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:45:45,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:45:45,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:45:45,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:45:45,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:45:45,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:45:45,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:45:45,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:45:45,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:45:45,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:45:45,387 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:45:45,387 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:45:45,388 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:45:45,388 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:45:45,388 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:45:45,396 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:45:45,396 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:45:45,398 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:45:45,398 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:45:45,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:45:45,399 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:45:45,399 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:45:45,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:45:45,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:45:45,401 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:45:45,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:45:45,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:45:45,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:45:45,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:45:45,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:45:45,402 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:45:45,403 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:45:45,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:45:45,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:45:45,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:45:45,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:45:45,404 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:45:45,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:45,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:45:45,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:45:45,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:45:45,406 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:45:45,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:45:45,407 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:45:45,407 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:45:45,407 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:45:45,407 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_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d887be7dd2c3278ee87053cbed7506ff3c2170c [2021-10-16 02:45:45,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:45:45,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:45:45,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:45:45,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:45:45,745 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:45:45,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2021-10-16 02:45:45,826 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/e6897b9fc/a7e223f58ab2409ab5a050ba84d1b7e8/FLAG1f47a879d [2021-10-16 02:45:46,304 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:45:46,309 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2021-10-16 02:45:46,318 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/e6897b9fc/a7e223f58ab2409ab5a050ba84d1b7e8/FLAG1f47a879d [2021-10-16 02:45:46,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/e6897b9fc/a7e223f58ab2409ab5a050ba84d1b7e8 [2021-10-16 02:45:46,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:45:46,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:45:46,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:46,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:45:46,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:45:46,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:46,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b3ba91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46, skipping insertion in model container [2021-10-16 02:45:46,678 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:46,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:45:46,703 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:45:46,887 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2021-10-16 02:45:46,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:46,928 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:45:46,944 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2021-10-16 02:45:46,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:45:46,971 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:45:46,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46 WrapperNode [2021-10-16 02:45:46,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:45:46,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:46,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:45:46,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:45:46,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:46,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:45:47,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:45:47,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:45:47,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:45:47,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:45:47,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:45:47,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:45:47,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:45:47,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (1/1) ... [2021-10-16 02:45:47,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:45:47,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:47,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:45:47,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:45:47,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:45:47,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:45:47,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:45:47,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:45:47,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:45:47,684 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-16 02:45:47,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:47 BoogieIcfgContainer [2021-10-16 02:45:47,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:45:47,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:45:47,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:45:47,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:45:47,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:45:46" (1/3) ... [2021-10-16 02:45:47,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ccbdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:47, skipping insertion in model container [2021-10-16 02:45:47,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:45:46" (2/3) ... [2021-10-16 02:45:47,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ccbdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:45:47, skipping insertion in model container [2021-10-16 02:45:47,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:45:47" (3/3) ... [2021-10-16 02:45:47,699 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c [2021-10-16 02:45:47,706 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:45:47,707 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-16 02:45:47,764 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:45:47,773 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, mConcurrency=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 [2021-10-16 02:45:47,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-16 02:45:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 34 states have internal predecessors, (47), 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) [2021-10-16 02:45:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:45:47,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:47,799 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:45:47,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:47,807 INFO L82 PathProgramCache]: Analyzing trace with hash 155587567, now seen corresponding path program 1 times [2021-10-16 02:45:47,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:47,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447526550] [2021-10-16 02:45:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:47,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:48,063 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:48,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447526550] [2021-10-16 02:45:48,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447526550] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:48,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:48,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:45:48,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804119143] [2021-10-16 02:45:48,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:48,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:48,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:48,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:48,094 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 34 states have internal predecessors, (47), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-16 02:45:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:50,342 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2021-10-16 02:45:50,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:50,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2021-10-16 02:45:50,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:50,357 INFO L225 Difference]: With dead ends: 92 [2021-10-16 02:45:50,357 INFO L226 Difference]: Without dead ends: 54 [2021-10-16 02:45:50,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-16 02:45:50,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-10-16 02:45:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.36) internal successors, (34), 30 states have internal predecessors, (34), 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) [2021-10-16 02:45:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-16 02:45:50,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2021-10-16 02:45:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:50,412 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-16 02:45:50,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-16 02:45:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-16 02:45:50,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:45:50,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:50,414 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:50,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:45:50,415 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:50,422 INFO L82 PathProgramCache]: Analyzing trace with hash -804784526, now seen corresponding path program 1 times [2021-10-16 02:45:50,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:50,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66543909] [2021-10-16 02:45:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:50,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:50,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:50,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66543909] [2021-10-16 02:45:50,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66543909] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:50,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:50,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:45:50,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372068359] [2021-10-16 02:45:50,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:50,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:50,508 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-16 02:45:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:50,536 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-10-16 02:45:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:45:50,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-10-16 02:45:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:50,538 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:45:50,538 INFO L226 Difference]: Without dead ends: 33 [2021-10-16 02:45:50,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-16 02:45:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-16 02:45:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 32 states have internal predecessors, (36), 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) [2021-10-16 02:45:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-10-16 02:45:50,549 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2021-10-16 02:45:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:50,549 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-10-16 02:45:50,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-16 02:45:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-10-16 02:45:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:45:50,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:50,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:50,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:45:50,552 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:50,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:50,554 INFO L82 PathProgramCache]: Analyzing trace with hash -804047694, now seen corresponding path program 1 times [2021-10-16 02:45:50,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:50,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013391149] [2021-10-16 02:45:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:50,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:50,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:50,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013391149] [2021-10-16 02:45:50,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013391149] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:50,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:50,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:45:50,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348376387] [2021-10-16 02:45:50,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:45:50,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:50,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:45:50,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:45:50,756 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-16 02:45:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:52,967 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-10-16 02:45:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:45:52,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-10-16 02:45:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:52,969 INFO L225 Difference]: With dead ends: 51 [2021-10-16 02:45:52,969 INFO L226 Difference]: Without dead ends: 49 [2021-10-16 02:45:52,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-16 02:45:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2021-10-16 02:45:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 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) [2021-10-16 02:45:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-16 02:45:52,977 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 7 [2021-10-16 02:45:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:52,978 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-16 02:45:52,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-16 02:45:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-16 02:45:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 02:45:52,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:52,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:45:52,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:45:52,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:45:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:45:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash 404435477, now seen corresponding path program 1 times [2021-10-16 02:45:52,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:45:52,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495786467] [2021-10-16 02:45:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:52,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:45:53,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:45:53,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503139606] [2021-10-16 02:45:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:45:53,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:45:53,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:45:53,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:45:53,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:45:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:45:53,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:45:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:45:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:53,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:45:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:45:53,434 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:45:53,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495786467] [2021-10-16 02:45:53,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:45:53,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503139606] [2021-10-16 02:45:53,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503139606] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:45:53,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:45:53,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:45:53,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373864337] [2021-10-16 02:45:53,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:45:53,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:45:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:45:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:45:53,441 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-10-16 02:45:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:45:59,960 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2021-10-16 02:45:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 02:45:59,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 9 [2021-10-16 02:45:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:45:59,970 INFO L225 Difference]: With dead ends: 86 [2021-10-16 02:45:59,970 INFO L226 Difference]: Without dead ends: 78 [2021-10-16 02:45:59,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:45:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-16 02:45:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2021-10-16 02:45:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 57 states have internal predecessors, (69), 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) [2021-10-16 02:45:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-10-16 02:45:59,985 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 9 [2021-10-16 02:45:59,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:45:59,986 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-10-16 02:45:59,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-10-16 02:45:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-10-16 02:45:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-16 02:45:59,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:45:59,988 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:00,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:00,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:00,213 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1567670847, now seen corresponding path program 1 times [2021-10-16 02:46:00,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:46:00,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125452115] [2021-10-16 02:46:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:00,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:46:00,242 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:46:00,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895088819] [2021-10-16 02:46:00,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:00,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:00,245 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:00,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:46:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:00,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:46:00,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:00,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:02,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:46:02,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125452115] [2021-10-16 02:46:02,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:46:02,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895088819] [2021-10-16 02:46:02,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895088819] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:02,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:02,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:46:02,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802867260] [2021-10-16 02:46:02,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 02:46:02,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:46:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 02:46:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:46:02,669 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-16 02:46:05,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:05,224 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-10-16 02:46:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:46:05,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 13 [2021-10-16 02:46:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:05,226 INFO L225 Difference]: With dead ends: 78 [2021-10-16 02:46:05,226 INFO L226 Difference]: Without dead ends: 72 [2021-10-16 02:46:05,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-10-16 02:46:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-16 02:46:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-10-16 02:46:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 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) [2021-10-16 02:46:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-10-16 02:46:05,238 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 13 [2021-10-16 02:46:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:05,239 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-10-16 02:46:05,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2021-10-16 02:46:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-10-16 02:46:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:46:05,240 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:05,240 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:05,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:05,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:05,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:05,442 INFO L82 PathProgramCache]: Analyzing trace with hash 487859498, now seen corresponding path program 1 times [2021-10-16 02:46:05,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:46:05,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021535836] [2021-10-16 02:46:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:05,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:46:05,463 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:46:05,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127922073] [2021-10-16 02:46:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:05,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:05,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:05,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:46:05,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:46:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:46:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:05,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:05,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:46:05,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021535836] [2021-10-16 02:46:05,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:46:05,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127922073] [2021-10-16 02:46:05,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127922073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:46:05,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [14703603] [2021-10-16 02:46:05,748 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-16 02:46:05,748 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:46:05,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:46:05,758 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:46:05,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:46:05,803 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,809 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:46:05,810 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,811 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:46:05,812 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:46:05,815 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:46:05,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 161 [2021-10-16 02:46:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:46:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 02:46:05,891 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,892 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:46:05,892 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,893 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:46:05,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:46:05,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-16 02:46:05,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:46:05,906 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,907 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:46:05,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:46:05,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:46:05,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,942 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:46:05,945 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-16 02:46:05,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:46:05,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:294, output treesize:149 [2021-10-16 02:46:05,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:06,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:46:06,161 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:46:06,168 INFO L168 Benchmark]: Toolchain (without parser) took 19497.03 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 52.5 MB in the beginning and 37.0 MB in the end (delta: 15.5 MB). Peak memory consumption was 36.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:06,168 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 88.1 MB. Free memory was 60.6 MB in the beginning and 60.5 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:46:06,169 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.19 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 52.2 MB in the beginning and 84.6 MB in the end (delta: -32.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:06,170 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.87 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 82.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:06,170 INFO L168 Benchmark]: Boogie Preprocessor took 33.91 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 81.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:06,171 INFO L168 Benchmark]: RCFGBuilder took 630.18 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 67.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:06,172 INFO L168 Benchmark]: TraceAbstraction took 18474.98 ms. Allocated memory is still 109.1 MB. Free memory was 67.4 MB in the beginning and 37.0 MB in the end (delta: 30.4 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:06,175 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 88.1 MB. Free memory was 60.6 MB in the beginning and 60.5 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 301.19 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 52.2 MB in the beginning and 84.6 MB in the end (delta: -32.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.87 ms. Allocated memory is still 109.1 MB. Free memory was 84.1 MB in the beginning and 82.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.91 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 81.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 630.18 ms. Allocated memory is still 109.1 MB. Free memory was 81.4 MB in the beginning and 67.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18474.98 ms. Allocated memory is still 109.1 MB. Free memory was 67.4 MB in the beginning and 37.0 MB in the end (delta: 30.4 MB). Peak memory consumption was 33.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:46:06,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:46:08,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:46:08,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:46:08,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:46:08,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:46:08,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:46:08,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:46:08,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:46:08,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:46:08,819 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:46:08,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:46:08,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:46:08,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:46:08,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:46:08,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:46:08,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:46:08,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:46:08,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:46:08,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:46:08,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:46:08,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:46:08,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:46:08,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:46:08,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:46:08,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:46:08,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:46:08,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:46:08,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:46:08,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:46:08,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:46:08,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:46:08,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:46:08,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:46:08,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:46:08,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:46:08,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:46:08,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:46:08,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:46:08,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:46:08,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:46:08,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:46:08,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:46:08,932 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:46:08,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:46:08,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:46:08,934 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:46:08,934 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:46:08,934 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:46:08,934 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:46:08,935 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:46:08,935 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:46:08,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:46:08,938 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:46:08,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:46:08,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:46:08,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:46:08,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:46:08,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:46:08,939 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:46:08,939 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:46:08,939 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:46:08,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:46:08,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:46:08,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:46:08,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:46:08,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:46:08,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:46:08,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:46:08,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:46:08,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:46:08,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:46:08,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:46:08,942 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:46:08,942 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:46:08,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:46:08,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:46:08,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:46:08,943 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_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d887be7dd2c3278ee87053cbed7506ff3c2170c [2021-10-16 02:46:09,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:46:09,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:46:09,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:46:09,448 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:46:09,449 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:46:09,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2021-10-16 02:46:09,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/d188e8b46/220a809100574b50ac2db8028ac180ce/FLAG4da97c45f [2021-10-16 02:46:10,146 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:46:10,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2021-10-16 02:46:10,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/d188e8b46/220a809100574b50ac2db8028ac180ce/FLAG4da97c45f [2021-10-16 02:46:10,501 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/data/d188e8b46/220a809100574b50ac2db8028ac180ce [2021-10-16 02:46:10,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:46:10,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:46:10,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:46:10,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:46:10,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:46:10,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2441c710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10, skipping insertion in model container [2021-10-16 02:46:10,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:46:10,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:46:10,695 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2021-10-16 02:46:10,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:46:10,724 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:46:10,736 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2021-10-16 02:46:10,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:46:10,759 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:46:10,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10 WrapperNode [2021-10-16 02:46:10,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:46:10,761 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:46:10,761 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:46:10,761 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:46:10,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,801 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:46:10,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:46:10,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:46:10,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:46:10,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:46:10,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:46:10,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:46:10,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:46:10,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (1/1) ... [2021-10-16 02:46:10,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:46:10,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:46:10,906 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:46:10,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:46:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:46:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:46:10,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:46:10,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:46:11,306 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:46:11,306 INFO L299 CfgBuilder]: Removed 22 assume(true) statements. [2021-10-16 02:46:11,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:11 BoogieIcfgContainer [2021-10-16 02:46:11,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:46:11,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:46:11,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:46:11,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:46:11,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:46:10" (1/3) ... [2021-10-16 02:46:11,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffae793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:46:11, skipping insertion in model container [2021-10-16 02:46:11,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:46:10" (2/3) ... [2021-10-16 02:46:11,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffae793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:46:11, skipping insertion in model container [2021-10-16 02:46:11,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:11" (3/3) ... [2021-10-16 02:46:11,317 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c [2021-10-16 02:46:11,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:46:11,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-16 02:46:11,372 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:46:11,389 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, mConcurrency=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 [2021-10-16 02:46:11,389 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-16 02:46:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 40 states have internal predecessors, (55), 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) [2021-10-16 02:46:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:46:11,429 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:11,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:11,431 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:11,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 119446382, now seen corresponding path program 1 times [2021-10-16 02:46:11,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:11,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734280672] [2021-10-16 02:46:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:11,460 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:11,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:11,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:11,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:46:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:46:11,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:11,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:11,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:11,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734280672] [2021-10-16 02:46:11,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734280672] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:11,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:11,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:46:11,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172841592] [2021-10-16 02:46:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:46:11,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:11,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:46:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:46:11,727 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 40 states have internal predecessors, (55), 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 4.0) internal successors, (8), 2 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) [2021-10-16 02:46:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:11,752 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2021-10-16 02:46:11,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:46:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) Word has length 8 [2021-10-16 02:46:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:11,764 INFO L225 Difference]: With dead ends: 79 [2021-10-16 02:46:11,764 INFO L226 Difference]: Without dead ends: 37 [2021-10-16 02:46:11,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:46:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-16 02:46:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-16 02:46:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 36 states have internal predecessors, (41), 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) [2021-10-16 02:46:11,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-10-16 02:46:11,810 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 8 [2021-10-16 02:46:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:11,811 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-10-16 02:46:11,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2021-10-16 02:46:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-10-16 02:46:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:46:11,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:11,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:11,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:12,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:12,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:12,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:12,026 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-16 02:46:12,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:12,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032101539] [2021-10-16 02:46:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:12,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:12,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:12,029 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:12,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:46:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:12,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:46:12,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:12,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:12,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:12,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032101539] [2021-10-16 02:46:12,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032101539] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:12,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:12,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-16 02:46:12,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633881821] [2021-10-16 02:46:12,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:46:12,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:46:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:46:12,185 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-16 02:46:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:12,425 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-10-16 02:46:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:46:12,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 8 [2021-10-16 02:46:12,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:12,427 INFO L225 Difference]: With dead ends: 61 [2021-10-16 02:46:12,427 INFO L226 Difference]: Without dead ends: 59 [2021-10-16 02:46:12,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:46:12,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-16 02:46:12,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 35. [2021-10-16 02:46:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 34 states have internal predecessors, (39), 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) [2021-10-16 02:46:12,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-10-16 02:46:12,454 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 8 [2021-10-16 02:46:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:12,454 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-10-16 02:46:12,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-10-16 02:46:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-10-16 02:46:12,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:46:12,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:12,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:12,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:12,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:12,667 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:12,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1986071569, now seen corresponding path program 1 times [2021-10-16 02:46:12,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:12,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139015818] [2021-10-16 02:46:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:12,669 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:12,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:12,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:12,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:46:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:46:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:12,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:12,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139015818] [2021-10-16 02:46:12,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139015818] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:12,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:12,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:46:12,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362526973] [2021-10-16 02:46:12,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:46:12,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:12,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:46:12,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:46:12,944 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-10-16 02:46:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:12,987 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2021-10-16 02:46:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:46:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) Word has length 10 [2021-10-16 02:46:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:12,990 INFO L225 Difference]: With dead ends: 69 [2021-10-16 02:46:12,990 INFO L226 Difference]: Without dead ends: 50 [2021-10-16 02:46:12,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:46:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-16 02:46:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-10-16 02:46:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 44 states have internal predecessors, (52), 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) [2021-10-16 02:46:13,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-10-16 02:46:13,001 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 10 [2021-10-16 02:46:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:13,002 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-10-16 02:46:13,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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) [2021-10-16 02:46:13,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-10-16 02:46:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:46:13,005 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:13,005 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:13,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:13,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:13,217 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:13,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1985334737, now seen corresponding path program 1 times [2021-10-16 02:46:13,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:13,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25180593] [2021-10-16 02:46:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:13,219 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:13,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:13,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:46:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:13,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:46:13,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:13,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:13,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:13,459 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:13,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25180593] [2021-10-16 02:46:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25180593] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:13,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:13,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-16 02:46:13,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384703344] [2021-10-16 02:46:13,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:46:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:46:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:46:13,463 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-10-16 02:46:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:13,709 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-10-16 02:46:13,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:46:13,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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 10 [2021-10-16 02:46:13,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:13,711 INFO L225 Difference]: With dead ends: 64 [2021-10-16 02:46:13,711 INFO L226 Difference]: Without dead ends: 62 [2021-10-16 02:46:13,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:46:13,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-16 02:46:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 43. [2021-10-16 02:46:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 42 states have internal predecessors, (49), 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) [2021-10-16 02:46:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-10-16 02:46:13,729 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 10 [2021-10-16 02:46:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:13,731 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-10-16 02:46:13,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2021-10-16 02:46:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-10-16 02:46:13,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:46:13,733 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:13,738 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:13,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:13,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:13,949 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:13,950 INFO L82 PathProgramCache]: Analyzing trace with hash -941046702, now seen corresponding path program 1 times [2021-10-16 02:46:13,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:13,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128991846] [2021-10-16 02:46:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:13,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:13,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:13,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:13,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:46:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:14,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:46:14,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:14,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:14,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:14,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128991846] [2021-10-16 02:46:14,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128991846] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:14,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:14,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:46:14,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205280817] [2021-10-16 02:46:14,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:46:14,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:46:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:46:14,486 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-10-16 02:46:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:17,308 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2021-10-16 02:46:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:46:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 [2021-10-16 02:46:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:17,316 INFO L225 Difference]: With dead ends: 106 [2021-10-16 02:46:17,316 INFO L226 Difference]: Without dead ends: 83 [2021-10-16 02:46:17,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:46:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-16 02:46:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-10-16 02:46:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 62 states have internal predecessors, (74), 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) [2021-10-16 02:46:17,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2021-10-16 02:46:17,330 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 12 [2021-10-16 02:46:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:17,330 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2021-10-16 02:46:17,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-10-16 02:46:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2021-10-16 02:46:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:46:17,331 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:17,332 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:17,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:17,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:17,544 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:17,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1803611644, now seen corresponding path program 1 times [2021-10-16 02:46:17,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:17,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759525228] [2021-10-16 02:46:17,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:17,545 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:17,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:17,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:17,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:46:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:46:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:46:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:46:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:17,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:46:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:46:18,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:46:18,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759525228] [2021-10-16 02:46:18,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759525228] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:46:18,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:46:18,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-16 02:46:18,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612459047] [2021-10-16 02:46:18,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 02:46:18,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:46:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 02:46:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:46:18,070 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-16 02:46:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:46:18,344 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-10-16 02:46:18,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-16 02:46:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 16 [2021-10-16 02:46:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:46:18,359 INFO L225 Difference]: With dead ends: 82 [2021-10-16 02:46:18,359 INFO L226 Difference]: Without dead ends: 70 [2021-10-16 02:46:18,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:46:18,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-16 02:46:18,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-10-16 02:46:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 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) [2021-10-16 02:46:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-10-16 02:46:18,379 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 16 [2021-10-16 02:46:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:46:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-10-16 02:46:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-10-16 02:46:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-10-16 02:46:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 02:46:18,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:46:18,385 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:46:18,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:18,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:18,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-16 02:46:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:46:18,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2018616451, now seen corresponding path program 1 times [2021-10-16 02:46:18,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:46:18,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933240779] [2021-10-16 02:46:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:46:18,600 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:46:18,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:46:18,602 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:46:18,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:46:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:46:18,813 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:46:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:46:18,941 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:46:18,942 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:46:18,943 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:18,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:18,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:18,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:18,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:18,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:18,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:46:18,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:46:19,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:46:19,152 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:46:19,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:46:19 BoogieIcfgContainer [2021-10-16 02:46:19,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:46:19,202 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:46:19,202 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:46:19,202 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:46:19,203 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:46:11" (3/4) ... [2021-10-16 02:46:19,204 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:46:19,263 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:46:19,263 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:46:19,265 INFO L168 Benchmark]: Toolchain (without parser) took 8759.71 ms. Allocated memory was 67.1 MB in the beginning and 90.2 MB in the end (delta: 23.1 MB). Free memory was 46.5 MB in the beginning and 55.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:19,265 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 67.1 MB. Free memory is still 46.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:46:19,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.63 ms. Allocated memory is still 67.1 MB. Free memory was 46.2 MB in the beginning and 36.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:19,266 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.42 ms. Allocated memory is still 67.1 MB. Free memory was 35.9 MB in the beginning and 34.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:19,267 INFO L168 Benchmark]: Boogie Preprocessor took 65.91 ms. Allocated memory is still 67.1 MB. Free memory was 34.3 MB in the beginning and 50.3 MB in the end (delta: -16.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:19,267 INFO L168 Benchmark]: RCFGBuilder took 440.14 ms. Allocated memory is still 67.1 MB. Free memory was 50.3 MB in the beginning and 39.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:19,268 INFO L168 Benchmark]: TraceAbstraction took 7890.76 ms. Allocated memory was 67.1 MB in the beginning and 90.2 MB in the end (delta: 23.1 MB). Free memory was 38.5 MB in the beginning and 58.2 MB in the end (delta: -19.7 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:19,268 INFO L168 Benchmark]: Witness Printer took 61.38 ms. Allocated memory is still 90.2 MB. Free memory was 58.2 MB in the beginning and 55.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:46:19,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 67.1 MB. Free memory is still 46.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.63 ms. Allocated memory is still 67.1 MB. Free memory was 46.2 MB in the beginning and 36.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.42 ms. Allocated memory is still 67.1 MB. Free memory was 35.9 MB in the beginning and 34.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 65.91 ms. Allocated memory is still 67.1 MB. Free memory was 34.3 MB in the beginning and 50.3 MB in the end (delta: -16.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * RCFGBuilder took 440.14 ms. Allocated memory is still 67.1 MB. Free memory was 50.3 MB in the beginning and 39.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7890.76 ms. Allocated memory was 67.1 MB in the beginning and 90.2 MB in the end (delta: 23.1 MB). Free memory was 38.5 MB in the beginning and 58.2 MB in the end (delta: -19.7 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Witness Printer took 61.38 ms. Allocated memory is still 90.2 MB. Free memory was 58.2 MB in the beginning and 55.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] unsigned int A, B; [L25] unsigned int r, d, p, q; [L26] A = __VERIFIER_nondet_uint() [L27] B = __VERIFIER_nondet_uint() [L12] COND FALSE !(!cond) VAL [counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [counter=0] [L35] EXPR counter++ VAL [counter=1] [L35] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [counter=1] [L35] EXPR counter++ VAL [counter=2] [L35] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND TRUE !(r >= d) VAL [counter=2] [L45] EXPR counter++ VAL [counter=3] [L45] COND FALSE !(counter++<2) [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND TRUE !(cond) VAL [counter=3] [L17] reach_error() VAL [counter=3] - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 7780.8ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 33.9ms, AutomataDifference: 3728.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 204 SDtfs, 198 SDslu, 287 SDs, 0 SdLazy, 186 SolverSat, 75 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 3031.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 485.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=6, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 112.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 74 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.8ms SsaConstructionTime, 321.2ms SatisfiabilityAnalysisTime, 1338.6ms InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 360 SizeOfPredicates, 15 NumberOfNonLiveVariables, 253 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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 proved your program to be incorrect! [2021-10-16 02:46:19,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15e9f670-33f5-4518-80a6-5e74ec9e0549/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...