./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.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_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/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_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/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_a502f84e-1fb7-429c-9131-e06b74da0cbc/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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/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_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/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_a502f84e-1fb7-429c-9131-e06b74da0cbc/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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:58:21,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:58:21,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:58:21,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:58:21,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:58:21,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:58:21,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:58:21,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:58:21,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:58:21,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:58:21,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:58:21,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:58:21,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:58:21,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:58:21,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:58:21,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:58:21,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:58:21,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:58:21,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:58:21,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:58:21,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:58:21,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:58:21,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:58:21,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:58:21,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:58:21,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:58:21,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:58:21,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:58:21,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:58:21,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:58:21,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:58:21,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:58:21,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:58:21,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:58:21,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:58:21,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:58:21,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:58:21,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:58:21,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:58:21,356 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:58:21,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:58:21,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:58:21,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:58:21,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:58:21,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:58:21,402 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:58:21,402 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:58:21,402 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:58:21,402 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:58:21,402 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:58:21,403 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:58:21,403 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:58:21,404 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:58:21,404 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:58:21,404 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:58:21,405 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:58:21,405 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:58:21,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:58:21,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:58:21,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:58:21,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:58:21,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:58:21,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:58:21,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:58:21,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:58:21,407 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:58:21,407 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:58:21,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:58:21,408 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:58:21,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:58:21,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:58:21,410 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:58:21,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:58:21,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:58:21,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:58:21,411 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:58:21,411 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:58:21,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:58:21,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:58:21,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:58:21,412 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:58:21,412 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_a502f84e-1fb7-429c-9131-e06b74da0cbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-16 02:58:21,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:58:21,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:58:21,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:58:21,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:58:21,772 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:58:21,773 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-16 02:58:21,843 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/e86dd5d9d/edbb6098e7b14d59a087571972fad04c/FLAG18965d0ce [2021-10-16 02:58:22,367 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:58:22,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-16 02:58:22,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/e86dd5d9d/edbb6098e7b14d59a087571972fad04c/FLAG18965d0ce [2021-10-16 02:58:22,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/e86dd5d9d/edbb6098e7b14d59a087571972fad04c [2021-10-16 02:58:22,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:58:22,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:58:22,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:58:22,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:58:22,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:58:22,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:58:22" (1/1) ... [2021-10-16 02:58:22,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7154e0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:22, skipping insertion in model container [2021-10-16 02:58:22,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:58:22" (1/1) ... [2021-10-16 02:58:22,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:58:22,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:58:22,993 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_a502f84e-1fb7-429c-9131-e06b74da0cbc/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-16 02:58:23,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:58:23,009 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:58:23,063 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_a502f84e-1fb7-429c-9131-e06b74da0cbc/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-16 02:58:23,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:58:23,080 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:58:23,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23 WrapperNode [2021-10-16 02:58:23,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:58:23,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:58:23,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:58:23,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:58:23,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:58:23,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:58:23,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:58:23,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:58:23,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:58:23,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:58:23,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:58:23,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:58:23,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (1/1) ... [2021-10-16 02:58:23,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:58:23,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:58:23,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:58:23,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:58:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:58:23,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:58:23,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:58:23,411 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:58:23,926 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-16 02:58:23,927 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-16 02:58:24,536 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:58:24,536 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:58:24,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:58:24 BoogieIcfgContainer [2021-10-16 02:58:24,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:58:24,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:58:24,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:58:24,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:58:24,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:58:22" (1/3) ... [2021-10-16 02:58:24,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b64390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:58:24, skipping insertion in model container [2021-10-16 02:58:24,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:23" (2/3) ... [2021-10-16 02:58:24,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b64390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:58:24, skipping insertion in model container [2021-10-16 02:58:24,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:58:24" (3/3) ... [2021-10-16 02:58:24,554 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-16 02:58:24,566 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:58:24,566 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:58:24,619 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:58:24,638 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 02:58:24,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:58:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 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 02:58:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-16 02:58:24,679 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:24,680 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:24,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:24,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1473416293, now seen corresponding path program 1 times [2021-10-16 02:58:24,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:58:24,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325039835] [2021-10-16 02:58:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:24,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:58:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:24,883 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 02:58:24,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:58:24,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325039835] [2021-10-16 02:58:24,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325039835] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:24,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:24,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:58:24,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712591631] [2021-10-16 02:58:24,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:24,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:58:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:24,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:24,910 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.7682926829268293) internal successors, (145), 83 states have internal predecessors, (145), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 02:58:25,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:25,095 INFO L93 Difference]: Finished difference Result 169 states and 293 transitions. [2021-10-16 02:58:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2021-10-16 02:58:25,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:25,111 INFO L225 Difference]: With dead ends: 169 [2021-10-16 02:58:25,111 INFO L226 Difference]: Without dead ends: 83 [2021-10-16 02:58:25,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-16 02:58:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-16 02:58:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.4634146341463414) internal successors, (120), 82 states have internal predecessors, (120), 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 02:58:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 120 transitions. [2021-10-16 02:58:25,170 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 120 transitions. Word has length 19 [2021-10-16 02:58:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:25,171 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 120 transitions. [2021-10-16 02:58:25,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 02:58:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 120 transitions. [2021-10-16 02:58:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:58:25,173 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:25,173 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:25,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:58:25,174 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1584510802, now seen corresponding path program 1 times [2021-10-16 02:58:25,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:58:25,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747762493] [2021-10-16 02:58:25,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:25,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:58:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:58:25,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:58:25,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747762493] [2021-10-16 02:58:25,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747762493] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:25,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:25,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:58:25,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632927543] [2021-10-16 02:58:25,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:25,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:58:25,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:25,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:25,305 INFO L87 Difference]: Start difference. First operand 83 states and 120 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 02:58:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:25,428 INFO L93 Difference]: Finished difference Result 178 states and 261 transitions. [2021-10-16 02:58:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:25,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-10-16 02:58:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:25,434 INFO L225 Difference]: With dead ends: 178 [2021-10-16 02:58:25,434 INFO L226 Difference]: Without dead ends: 98 [2021-10-16 02:58:25,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:25,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-16 02:58:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-10-16 02:58:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.431578947368421) internal successors, (136), 95 states have internal predecessors, (136), 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 02:58:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 136 transitions. [2021-10-16 02:58:25,456 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 136 transitions. Word has length 28 [2021-10-16 02:58:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:25,456 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 136 transitions. [2021-10-16 02:58:25,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 02:58:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 136 transitions. [2021-10-16 02:58:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-16 02:58:25,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:25,459 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:25,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:58:25,461 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash -226758766, now seen corresponding path program 1 times [2021-10-16 02:58:25,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:58:25,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497876744] [2021-10-16 02:58:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:25,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:58:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:58:25,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:58:25,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497876744] [2021-10-16 02:58:25,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497876744] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:25,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:25,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:58:25,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126181348] [2021-10-16 02:58:25,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:25,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:58:25,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:25,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:25,570 INFO L87 Difference]: Start difference. First operand 96 states and 136 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 02:58:25,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:25,715 INFO L93 Difference]: Finished difference Result 206 states and 297 transitions. [2021-10-16 02:58:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:25,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 39 [2021-10-16 02:58:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:25,717 INFO L225 Difference]: With dead ends: 206 [2021-10-16 02:58:25,717 INFO L226 Difference]: Without dead ends: 113 [2021-10-16 02:58:25,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-16 02:58:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-10-16 02:58:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4) internal successors, (154), 110 states have internal predecessors, (154), 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 02:58:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2021-10-16 02:58:25,726 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 39 [2021-10-16 02:58:25,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:25,727 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2021-10-16 02:58:25,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 02:58:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2021-10-16 02:58:25,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-16 02:58:25,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:25,730 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:25,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:58:25,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash -466595364, now seen corresponding path program 1 times [2021-10-16 02:58:25,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:58:25,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141248946] [2021-10-16 02:58:25,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:25,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:58:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:58:25,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:58:25,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141248946] [2021-10-16 02:58:25,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141248946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:58:25,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158117011] [2021-10-16 02:58:25,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:25,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:58:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:58:25,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:58:25,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:58:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:58:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-16 02:58:26,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-16 02:58:26,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158117011] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:26,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:58:26,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2021-10-16 02:58:26,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955461985] [2021-10-16 02:58:26,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:58:26,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:58:26,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:58:26,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:58:26,511 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 02:58:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:26,831 INFO L93 Difference]: Finished difference Result 312 states and 467 transitions. [2021-10-16 02:58:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:58:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 52 [2021-10-16 02:58:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:26,834 INFO L225 Difference]: With dead ends: 312 [2021-10-16 02:58:26,835 INFO L226 Difference]: Without dead ends: 203 [2021-10-16 02:58:26,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-16 02:58:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-16 02:58:26,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 186. [2021-10-16 02:58:26,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.3783783783783783) internal successors, (255), 185 states have internal predecessors, (255), 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 02:58:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 255 transitions. [2021-10-16 02:58:26,852 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 255 transitions. Word has length 52 [2021-10-16 02:58:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:26,852 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 255 transitions. [2021-10-16 02:58:26,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 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 02:58:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 255 transitions. [2021-10-16 02:58:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-16 02:58:26,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:26,856 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:26,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:27,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:58:27,082 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:27,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1777131692, now seen corresponding path program 1 times [2021-10-16 02:58:27,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:58:27,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064844701] [2021-10-16 02:58:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:27,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:58:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-16 02:58:27,190 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:58:27,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064844701] [2021-10-16 02:58:27,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064844701] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:27,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:27,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:58:27,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009782563] [2021-10-16 02:58:27,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:27,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:58:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:27,195 INFO L87 Difference]: Start difference. First operand 186 states and 255 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 02:58:27,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:27,313 INFO L93 Difference]: Finished difference Result 390 states and 543 transitions. [2021-10-16 02:58:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 67 [2021-10-16 02:58:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:27,318 INFO L225 Difference]: With dead ends: 390 [2021-10-16 02:58:27,318 INFO L226 Difference]: Without dead ends: 207 [2021-10-16 02:58:27,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:27,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-16 02:58:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-10-16 02:58:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.357843137254902) internal successors, (277), 204 states have internal predecessors, (277), 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 02:58:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 277 transitions. [2021-10-16 02:58:27,348 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 277 transitions. Word has length 67 [2021-10-16 02:58:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:27,348 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 277 transitions. [2021-10-16 02:58:27,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 02:58:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 277 transitions. [2021-10-16 02:58:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-16 02:58:27,353 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:27,353 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:27,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:58:27,354 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:27,358 INFO L82 PathProgramCache]: Analyzing trace with hash -201552327, now seen corresponding path program 1 times [2021-10-16 02:58:27,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:58:27,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419857426] [2021-10-16 02:58:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:27,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:58:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-16 02:58:27,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:58:27,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419857426] [2021-10-16 02:58:27,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419857426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:58:27,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927938008] [2021-10-16 02:58:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:27,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:58:27,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:58:27,480 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:58:27,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:58:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:27,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:58:27,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-10-16 02:58:27,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-10-16 02:58:28,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927938008] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:58:28,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [163202445] [2021-10-16 02:58:28,290 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2021-10-16 02:58:28,290 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:58:28,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:58:28,301 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:58:28,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:58:28,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,385 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:58:28,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:58:28,388 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:58:28,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:58:28,405 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 355 [2021-10-16 02:58:28,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,505 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 02:58:28,506 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,507 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:58:28,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,508 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:58:28,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:58:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,542 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 02:58:28,542 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:58:28,543 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,544 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:58:28,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:58:28,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:58:28,573 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 02:58:28,574 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:58:28,579 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,580 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 02:58:28,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-16 02:58:28,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:58:28,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:58:28,764 INFO L180 QuantifierPusher]: treesize reduction 18, result has 98.2 percent of original size [2021-10-16 02:58:28,798 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 987 [2021-10-16 02:58:28,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-10-16 02:58:28,801 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:996, output treesize:987 [2021-10-16 02:58:28,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:29,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-16 02:58:29,030 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_18| 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 02:58:29,038 INFO L168 Benchmark]: Toolchain (without parser) took 6333.49 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 69.8 MB in the beginning and 54.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 70.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:29,038 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory is still 86.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:58:29,039 INFO L168 Benchmark]: CACSL2BoogieTranslator took 375.60 ms. Allocated memory is still 113.2 MB. Free memory was 69.6 MB in the beginning and 84.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:29,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.23 ms. Allocated memory is still 113.2 MB. Free memory was 84.0 MB in the beginning and 81.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:29,044 INFO L168 Benchmark]: Boogie Preprocessor took 38.36 ms. Allocated memory is still 113.2 MB. Free memory was 81.1 MB in the beginning and 79.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:29,045 INFO L168 Benchmark]: RCFGBuilder took 1366.24 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 79.4 MB in the beginning and 110.2 MB in the end (delta: -30.7 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:29,045 INFO L168 Benchmark]: TraceAbstraction took 4495.59 ms. Allocated memory is still 151.0 MB. Free memory was 109.2 MB in the beginning and 54.0 MB in the end (delta: 55.3 MB). Peak memory consumption was 73.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:29,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 113.2 MB. Free memory is still 86.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 375.60 ms. Allocated memory is still 113.2 MB. Free memory was 69.6 MB in the beginning and 84.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.23 ms. Allocated memory is still 113.2 MB. Free memory was 84.0 MB in the beginning and 81.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.36 ms. Allocated memory is still 113.2 MB. Free memory was 81.1 MB in the beginning and 79.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1366.24 ms. Allocated memory was 113.2 MB in the beginning and 151.0 MB in the end (delta: 37.7 MB). Free memory was 79.4 MB in the beginning and 110.2 MB in the end (delta: -30.7 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4495.59 ms. Allocated memory is still 151.0 MB. Free memory was 109.2 MB in the beginning and 54.0 MB in the end (delta: 55.3 MB). Peak memory consumption was 73.4 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_18| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_18|: 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 02:58:29,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/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 02:58:31,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:58:31,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:58:31,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:58:31,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:58:31,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:58:31,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:58:31,662 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:58:31,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:58:31,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:58:31,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:58:31,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:58:31,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:58:31,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:58:31,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:58:31,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:58:31,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:58:31,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:58:31,688 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:58:31,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:58:31,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:58:31,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:58:31,708 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:58:31,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:58:31,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:58:31,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:58:31,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:58:31,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:58:31,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:58:31,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:58:31,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:58:31,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:58:31,723 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:58:31,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:58:31,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:58:31,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:58:31,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:58:31,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:58:31,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:58:31,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:58:31,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:58:31,746 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:58:31,790 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:58:31,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:58:31,792 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:58:31,792 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:58:31,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:58:31,792 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:58:31,793 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:58:31,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:58:31,793 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:58:31,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:58:31,794 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:58:31,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:58:31,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:58:31,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:58:31,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:58:31,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:58:31,796 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:58:31,796 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:58:31,796 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:58:31,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:58:31,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:58:31,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:58:31,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:58:31,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:58:31,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:58:31,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:58:31,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:58:31,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:58:31,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:58:31,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:58:31,799 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:58:31,800 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:58:31,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:58:31,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:58:31,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:58:31,801 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_a502f84e-1fb7-429c-9131-e06b74da0cbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-16 02:58:32,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:58:32,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:58:32,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:58:32,221 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:58:32,222 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:58:32,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-16 02:58:32,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/88efec002/153a2d247b93460d9595da704fd7a507/FLAGb739ae36a [2021-10-16 02:58:32,802 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:58:32,803 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-16 02:58:32,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/88efec002/153a2d247b93460d9595da704fd7a507/FLAGb739ae36a [2021-10-16 02:58:33,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/data/88efec002/153a2d247b93460d9595da704fd7a507 [2021-10-16 02:58:33,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:58:33,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:58:33,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:58:33,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:58:33,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:58:33,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36546303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33, skipping insertion in model container [2021-10-16 02:58:33,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:58:33,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:58:33,502 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_a502f84e-1fb7-429c-9131-e06b74da0cbc/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-16 02:58:33,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:58:33,541 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:58:33,595 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_a502f84e-1fb7-429c-9131-e06b74da0cbc/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-16 02:58:33,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:58:33,609 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:58:33,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33 WrapperNode [2021-10-16 02:58:33,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:58:33,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:58:33,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:58:33,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:58:33,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,630 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:58:33,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:58:33,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:58:33,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:58:33,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:58:33,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:58:33,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:58:33,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:58:33,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (1/1) ... [2021-10-16 02:58:33,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:58:33,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:58:33,763 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:58:33,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:58:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:58:33,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:58:33,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:58:33,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:58:33,959 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-16 02:58:34,411 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-16 02:58:34,411 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-16 02:58:34,419 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:58:34,420 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:58:34,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:58:34 BoogieIcfgContainer [2021-10-16 02:58:34,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:58:34,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:58:34,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:58:34,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:58:34,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:58:33" (1/3) ... [2021-10-16 02:58:34,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e023b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:58:34, skipping insertion in model container [2021-10-16 02:58:34,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:58:33" (2/3) ... [2021-10-16 02:58:34,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e023b78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:58:34, skipping insertion in model container [2021-10-16 02:58:34,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:58:34" (3/3) ... [2021-10-16 02:58:34,430 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-16 02:58:34,435 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:58:34,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:58:34,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:58:34,491 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 02:58:34,491 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:58:34,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 124 states have internal predecessors, (213), 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 02:58:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 02:58:34,521 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:34,521 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:34,522 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:34,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2021-10-16 02:58:34,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:34,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473070201] [2021-10-16 02:58:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:34,540 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:34,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:34,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:34,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:58:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:34,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:34,856 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 02:58:34,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:34,943 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 02:58:34,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:34,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473070201] [2021-10-16 02:58:34,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473070201] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:34,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:34,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:34,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270597397] [2021-10-16 02:58:34,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:34,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:34,971 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7317073170731707) internal successors, (213), 124 states have internal predecessors, (213), 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 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 02:58:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:35,179 INFO L93 Difference]: Finished difference Result 246 states and 421 transitions. [2021-10-16 02:58:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:35,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 24 [2021-10-16 02:58:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:35,193 INFO L225 Difference]: With dead ends: 246 [2021-10-16 02:58:35,194 INFO L226 Difference]: Without dead ends: 112 [2021-10-16 02:58:35,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-16 02:58:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-10-16 02:58:35,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.5225225225225225) internal successors, (169), 111 states have internal predecessors, (169), 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 02:58:35,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 169 transitions. [2021-10-16 02:58:35,258 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 169 transitions. Word has length 24 [2021-10-16 02:58:35,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:35,258 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 169 transitions. [2021-10-16 02:58:35,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 02:58:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 169 transitions. [2021-10-16 02:58:35,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-16 02:58:35,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:35,265 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:35,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 02:58:35,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:35,474 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2021-10-16 02:58:35,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:35,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980848150] [2021-10-16 02:58:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:35,482 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:35,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:35,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:58:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:58:35,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:58:35,876 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:35,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980848150] [2021-10-16 02:58:35,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980848150] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:35,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:35,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:35,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255217043] [2021-10-16 02:58:35,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:35,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:35,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:35,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:35,883 INFO L87 Difference]: Start difference. First operand 112 states and 169 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 02:58:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:36,037 INFO L93 Difference]: Finished difference Result 233 states and 356 transitions. [2021-10-16 02:58:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:36,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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) Word has length 36 [2021-10-16 02:58:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:36,040 INFO L225 Difference]: With dead ends: 233 [2021-10-16 02:58:36,040 INFO L226 Difference]: Without dead ends: 131 [2021-10-16 02:58:36,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-16 02:58:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-10-16 02:58:36,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.5) internal successors, (189), 126 states have internal predecessors, (189), 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 02:58:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2021-10-16 02:58:36,054 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 36 [2021-10-16 02:58:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:36,054 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2021-10-16 02:58:36,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 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 02:58:36,055 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2021-10-16 02:58:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-16 02:58:36,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:36,057 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:36,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:36,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:36,271 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:36,272 INFO L82 PathProgramCache]: Analyzing trace with hash 213639527, now seen corresponding path program 1 times [2021-10-16 02:58:36,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:36,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625390338] [2021-10-16 02:58:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:36,273 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:36,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:36,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:58:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:36,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:58:36,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:58:36,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:36,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625390338] [2021-10-16 02:58:36,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625390338] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:36,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:36,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:36,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977930574] [2021-10-16 02:58:36,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:36,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:36,701 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 02:58:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:36,835 INFO L93 Difference]: Finished difference Result 265 states and 400 transitions. [2021-10-16 02:58:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 50 [2021-10-16 02:58:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:36,837 INFO L225 Difference]: With dead ends: 265 [2021-10-16 02:58:36,837 INFO L226 Difference]: Without dead ends: 148 [2021-10-16 02:58:36,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-16 02:58:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-10-16 02:58:36,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.4755244755244756) internal successors, (211), 143 states have internal predecessors, (211), 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 02:58:36,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2021-10-16 02:58:36,850 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 50 [2021-10-16 02:58:36,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:36,851 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2021-10-16 02:58:36,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 02:58:36,852 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2021-10-16 02:58:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-16 02:58:36,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:36,859 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:36,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-16 02:58:37,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:37,074 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:37,074 INFO L82 PathProgramCache]: Analyzing trace with hash 370823208, now seen corresponding path program 1 times [2021-10-16 02:58:37,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:37,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988136904] [2021-10-16 02:58:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:37,076 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:37,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:37,079 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:37,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:58:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:37,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:58:37,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:58:37,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:37,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988136904] [2021-10-16 02:58:37,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988136904] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:37,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:37,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:58:37,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796563861] [2021-10-16 02:58:37,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:58:37,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:37,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:58:37,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:37,589 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 02:58:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:37,843 INFO L93 Difference]: Finished difference Result 349 states and 534 transitions. [2021-10-16 02:58:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:58:37,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 67 [2021-10-16 02:58:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:37,846 INFO L225 Difference]: With dead ends: 349 [2021-10-16 02:58:37,846 INFO L226 Difference]: Without dead ends: 215 [2021-10-16 02:58:37,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-10-16 02:58:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2021-10-16 02:58:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.441747572815534) internal successors, (297), 206 states have internal predecessors, (297), 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 02:58:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 297 transitions. [2021-10-16 02:58:37,867 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 297 transitions. Word has length 67 [2021-10-16 02:58:37,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:37,869 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 297 transitions. [2021-10-16 02:58:37,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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 02:58:37,870 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 297 transitions. [2021-10-16 02:58:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-16 02:58:37,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:37,873 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:37,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:38,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:38,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1528022105, now seen corresponding path program 1 times [2021-10-16 02:58:38,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:38,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262778170] [2021-10-16 02:58:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:38,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:38,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:38,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:38,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:58:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:38,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:38,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:58:38,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-16 02:58:38,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:38,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262778170] [2021-10-16 02:58:38,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262778170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:38,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:38,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:38,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052933715] [2021-10-16 02:58:38,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:38,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:38,626 INFO L87 Difference]: Start difference. First operand 207 states and 297 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 02:58:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:38,752 INFO L93 Difference]: Finished difference Result 427 states and 620 transitions. [2021-10-16 02:58:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:38,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 68 [2021-10-16 02:58:38,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:38,759 INFO L225 Difference]: With dead ends: 427 [2021-10-16 02:58:38,759 INFO L226 Difference]: Without dead ends: 230 [2021-10-16 02:58:38,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-10-16 02:58:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2021-10-16 02:58:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.4266666666666667) internal successors, (321), 225 states have internal predecessors, (321), 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 02:58:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 321 transitions. [2021-10-16 02:58:38,772 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 321 transitions. Word has length 68 [2021-10-16 02:58:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:38,772 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 321 transitions. [2021-10-16 02:58:38,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 02:58:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 321 transitions. [2021-10-16 02:58:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-16 02:58:38,774 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:38,774 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:38,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:38,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:38,986 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1678422895, now seen corresponding path program 1 times [2021-10-16 02:58:38,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:38,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200999528] [2021-10-16 02:58:38,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:38,987 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:38,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:38,988 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:38,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:58:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:39,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:58:39,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-16 02:58:39,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:39,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200999528] [2021-10-16 02:58:39,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200999528] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:39,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:39,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626222065] [2021-10-16 02:58:39,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:39,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:39,601 INFO L87 Difference]: Start difference. First operand 226 states and 321 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:58:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:39,756 INFO L93 Difference]: Finished difference Result 466 states and 670 transitions. [2021-10-16 02:58:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 84 [2021-10-16 02:58:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:39,759 INFO L225 Difference]: With dead ends: 466 [2021-10-16 02:58:39,759 INFO L226 Difference]: Without dead ends: 250 [2021-10-16 02:58:39,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-10-16 02:58:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-10-16 02:58:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.410569105691057) internal successors, (347), 246 states have internal predecessors, (347), 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 02:58:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 347 transitions. [2021-10-16 02:58:39,774 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 347 transitions. Word has length 84 [2021-10-16 02:58:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:39,777 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 347 transitions. [2021-10-16 02:58:39,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:58:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 347 transitions. [2021-10-16 02:58:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-16 02:58:39,781 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:39,781 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:39,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:39,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:39,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1619803512, now seen corresponding path program 1 times [2021-10-16 02:58:39,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:39,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716014139] [2021-10-16 02:58:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:39,998 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:39,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:39,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:40,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:58:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:40,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-16 02:58:40,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-16 02:58:40,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:40,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716014139] [2021-10-16 02:58:40,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716014139] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:40,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:40,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:58:40,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582721638] [2021-10-16 02:58:40,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:58:40,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:40,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:58:40,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:40,812 INFO L87 Difference]: Start difference. First operand 247 states and 347 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 02:58:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:40,880 INFO L93 Difference]: Finished difference Result 743 states and 1042 transitions. [2021-10-16 02:58:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:58:40,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 103 [2021-10-16 02:58:40,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:40,884 INFO L225 Difference]: With dead ends: 743 [2021-10-16 02:58:40,884 INFO L226 Difference]: Without dead ends: 506 [2021-10-16 02:58:40,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:40,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-10-16 02:58:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2021-10-16 02:58:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.39009900990099) internal successors, (702), 505 states have internal predecessors, (702), 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 02:58:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 702 transitions. [2021-10-16 02:58:40,904 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 702 transitions. Word has length 103 [2021-10-16 02:58:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:40,905 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 702 transitions. [2021-10-16 02:58:40,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 02:58:40,906 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 702 transitions. [2021-10-16 02:58:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-16 02:58:40,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:40,908 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:40,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:41,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:41,130 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:41,130 INFO L82 PathProgramCache]: Analyzing trace with hash -847602632, now seen corresponding path program 1 times [2021-10-16 02:58:41,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:41,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810287583] [2021-10-16 02:58:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:41,131 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:41,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:41,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:41,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:58:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:41,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:58:41,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:58:41,991 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:41,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810287583] [2021-10-16 02:58:41,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810287583] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:41,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:41,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:41,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221925376] [2021-10-16 02:58:41,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:41,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:41,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:41,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:41,996 INFO L87 Difference]: Start difference. First operand 506 states and 702 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 02:58:42,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:42,034 INFO L93 Difference]: Finished difference Result 1023 states and 1418 transitions. [2021-10-16 02:58:42,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:42,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 103 [2021-10-16 02:58:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:42,040 INFO L225 Difference]: With dead ends: 1023 [2021-10-16 02:58:42,040 INFO L226 Difference]: Without dead ends: 527 [2021-10-16 02:58:42,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-10-16 02:58:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2021-10-16 02:58:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 1.3859315589353611) internal successors, (729), 526 states have internal predecessors, (729), 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 02:58:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 729 transitions. [2021-10-16 02:58:42,064 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 729 transitions. Word has length 103 [2021-10-16 02:58:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:42,064 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 729 transitions. [2021-10-16 02:58:42,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 02:58:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 729 transitions. [2021-10-16 02:58:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-16 02:58:42,066 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:42,067 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:42,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:42,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:42,285 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:42,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:42,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1168582955, now seen corresponding path program 1 times [2021-10-16 02:58:42,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:42,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468406409] [2021-10-16 02:58:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:42,286 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:42,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:42,287 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:42,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:58:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-16 02:58:42,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-16 02:58:43,160 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:43,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468406409] [2021-10-16 02:58:43,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468406409] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:43,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:43,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:43,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924148462] [2021-10-16 02:58:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:43,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:43,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:43,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:43,163 INFO L87 Difference]: Start difference. First operand 527 states and 729 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 02:58:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:43,204 INFO L93 Difference]: Finished difference Result 1070 states and 1478 transitions. [2021-10-16 02:58:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 104 [2021-10-16 02:58:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:43,209 INFO L225 Difference]: With dead ends: 1070 [2021-10-16 02:58:43,209 INFO L226 Difference]: Without dead ends: 553 [2021-10-16 02:58:43,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:43,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-10-16 02:58:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-10-16 02:58:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.3804347826086956) internal successors, (762), 552 states have internal predecessors, (762), 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 02:58:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 762 transitions. [2021-10-16 02:58:43,228 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 762 transitions. Word has length 104 [2021-10-16 02:58:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:43,229 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 762 transitions. [2021-10-16 02:58:43,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 02:58:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 762 transitions. [2021-10-16 02:58:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-16 02:58:43,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:43,231 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:43,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:43,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:43,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash -53319870, now seen corresponding path program 1 times [2021-10-16 02:58:43,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:43,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456526208] [2021-10-16 02:58:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:43,447 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:43,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:43,448 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:43,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:58:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:43,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:43,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-16 02:58:44,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-16 02:58:44,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:44,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456526208] [2021-10-16 02:58:44,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456526208] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:44,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:44,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:58:44,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612386730] [2021-10-16 02:58:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:58:44,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:58:44,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:44,301 INFO L87 Difference]: Start difference. First operand 553 states and 762 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 02:58:44,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:44,381 INFO L93 Difference]: Finished difference Result 1520 states and 2113 transitions. [2021-10-16 02:58:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:58:44,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 105 [2021-10-16 02:58:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:44,388 INFO L225 Difference]: With dead ends: 1520 [2021-10-16 02:58:44,388 INFO L226 Difference]: Without dead ends: 1003 [2021-10-16 02:58:44,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-10-16 02:58:44,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2021-10-16 02:58:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.3892215568862276) internal successors, (1392), 1002 states have internal predecessors, (1392), 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 02:58:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1392 transitions. [2021-10-16 02:58:44,422 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1392 transitions. Word has length 105 [2021-10-16 02:58:44,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:44,423 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1392 transitions. [2021-10-16 02:58:44,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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 02:58:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1392 transitions. [2021-10-16 02:58:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-10-16 02:58:44,427 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:44,427 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:44,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:44,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:44,645 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1519363111, now seen corresponding path program 1 times [2021-10-16 02:58:44,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:44,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126768785] [2021-10-16 02:58:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:44,646 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:44,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:44,647 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:44,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:58:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:45,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:45,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-16 02:58:45,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-16 02:58:45,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:45,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126768785] [2021-10-16 02:58:45,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126768785] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:45,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:45,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:58:45,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057447481] [2021-10-16 02:58:45,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:58:45,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:58:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:45,835 INFO L87 Difference]: Start difference. First operand 1003 states and 1392 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 02:58:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:46,061 INFO L93 Difference]: Finished difference Result 2091 states and 2938 transitions. [2021-10-16 02:58:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:58:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 173 [2021-10-16 02:58:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:46,076 INFO L225 Difference]: With dead ends: 2091 [2021-10-16 02:58:46,076 INFO L226 Difference]: Without dead ends: 1124 [2021-10-16 02:58:46,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:58:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-10-16 02:58:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1095. [2021-10-16 02:58:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 1.3711151736745886) internal successors, (1500), 1094 states have internal predecessors, (1500), 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 02:58:46,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1500 transitions. [2021-10-16 02:58:46,116 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1500 transitions. Word has length 173 [2021-10-16 02:58:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:46,117 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1500 transitions. [2021-10-16 02:58:46,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 02:58:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1500 transitions. [2021-10-16 02:58:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-10-16 02:58:46,122 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:46,122 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:46,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:46,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:46,335 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:46,335 INFO L82 PathProgramCache]: Analyzing trace with hash -759567935, now seen corresponding path program 1 times [2021-10-16 02:58:46,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:46,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912536413] [2021-10-16 02:58:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:46,336 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:46,337 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:46,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:58:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:58:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:58:46,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:58:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:58:47,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:58:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-16 02:58:47,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:58:47,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912536413] [2021-10-16 02:58:47,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912536413] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:58:47,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:58:47,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 02:58:47,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147144550] [2021-10-16 02:58:47,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:58:47,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:58:47,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:58:47,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:47,813 INFO L87 Difference]: Start difference. First operand 1095 states and 1500 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 02:58:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:58:47,886 INFO L93 Difference]: Finished difference Result 2409 states and 3304 transitions. [2021-10-16 02:58:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:58:47,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 194 [2021-10-16 02:58:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:58:47,895 INFO L225 Difference]: With dead ends: 2409 [2021-10-16 02:58:47,895 INFO L226 Difference]: Without dead ends: 1350 [2021-10-16 02:58:47,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:58:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-10-16 02:58:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 1350. [2021-10-16 02:58:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.369162342475908) internal successors, (1847), 1349 states have internal predecessors, (1847), 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 02:58:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1847 transitions. [2021-10-16 02:58:47,950 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1847 transitions. Word has length 194 [2021-10-16 02:58:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:58:47,950 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 1847 transitions. [2021-10-16 02:58:47,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 02:58:47,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1847 transitions. [2021-10-16 02:58:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-10-16 02:58:47,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:58:47,956 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:58:47,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:48,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:48,170 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:58:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:58:48,170 INFO L82 PathProgramCache]: Analyzing trace with hash 342847369, now seen corresponding path program 1 times [2021-10-16 02:58:48,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:58:48,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599619839] [2021-10-16 02:58:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:58:48,170 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:58:48,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:58:48,171 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:58:48,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:58:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:58:48,726 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:58:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:58:49,110 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:58:49,110 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:58:49,111 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:58:49,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:58:49,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:58:49,320 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:58:49,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:58:49 BoogieIcfgContainer [2021-10-16 02:58:49,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:58:49,511 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:58:49,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:58:49,511 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:58:49,511 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:58:34" (3/4) ... [2021-10-16 02:58:49,515 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:58:49,689 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:58:49,689 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:58:49,691 INFO L168 Benchmark]: Toolchain (without parser) took 16545.03 ms. Allocated memory was 67.1 MB in the beginning and 100.7 MB in the end (delta: 33.6 MB). Free memory was 46.5 MB in the beginning and 27.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 51.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:49,691 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 67.1 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:58:49,692 INFO L168 Benchmark]: CACSL2BoogieTranslator took 463.99 ms. Allocated memory is still 67.1 MB. Free memory was 46.4 MB in the beginning and 45.9 MB in the end (delta: 465.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:49,692 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.62 ms. Allocated memory is still 67.1 MB. Free memory was 45.7 MB in the beginning and 43.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:49,693 INFO L168 Benchmark]: Boogie Preprocessor took 40.97 ms. Allocated memory is still 67.1 MB. Free memory was 43.2 MB in the beginning and 41.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:49,693 INFO L168 Benchmark]: RCFGBuilder took 720.11 ms. Allocated memory is still 67.1 MB. Free memory was 41.1 MB in the beginning and 38.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:49,693 INFO L168 Benchmark]: TraceAbstraction took 15085.84 ms. Allocated memory was 67.1 MB in the beginning and 100.7 MB in the end (delta: 33.6 MB). Free memory was 38.1 MB in the beginning and 50.3 MB in the end (delta: -12.2 MB). Peak memory consumption was 53.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:49,694 INFO L168 Benchmark]: Witness Printer took 178.38 ms. Allocated memory is still 100.7 MB. Free memory was 50.3 MB in the beginning and 27.8 MB in the end (delta: 22.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:58:49,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 67.1 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 463.99 ms. Allocated memory is still 67.1 MB. Free memory was 46.4 MB in the beginning and 45.9 MB in the end (delta: 465.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.62 ms. Allocated memory is still 67.1 MB. Free memory was 45.7 MB in the beginning and 43.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.97 ms. Allocated memory is still 67.1 MB. Free memory was 43.2 MB in the beginning and 41.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 720.11 ms. Allocated memory is still 67.1 MB. Free memory was 41.1 MB in the beginning and 38.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15085.84 ms. Allocated memory was 67.1 MB in the beginning and 100.7 MB in the end (delta: 33.6 MB). Free memory was 38.1 MB in the beginning and 50.3 MB in the end (delta: -12.2 MB). Peak memory consumption was 53.4 MB. Max. memory is 16.1 GB. * Witness Printer took 178.38 ms. Allocated memory is still 100.7 MB. Free memory was 50.3 MB in the beginning and 27.8 MB in the end (delta: 22.5 MB). Peak memory consumption was 21.0 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: 609]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND TRUE s__bbio != s__wbio [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 125 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14834.9ms, OverallIterations: 13, TraceHistogramMax: 11, EmptinessCheckTime: 51.3ms, AutomataDifference: 1687.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2289 SDtfs, 1120 SDslu, 1557 SDs, 0 SdLazy, 933 SolverSat, 167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 907.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2198 GetRequests, 2182 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1350occurred in iteration=12, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 294.3ms AutomataMinimizationTime, 12 MinimizatonAttempts, 52 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 232.4ms SsaConstructionTime, 651.1ms SatisfiabilityAnalysisTime, 5813.0ms InterpolantComputationTime, 1307 NumberOfCodeBlocks, 1307 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2198 ConstructedInterpolants, 0 QuantifiedInterpolants, 3411 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1990 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 24 InterpolantComputations, 24 PerfectInterpolantSequences, 3576/3576 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 02:58:49,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a502f84e-1fb7-429c-9131-e06b74da0cbc/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...