./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8 --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 417a96bf424eb15cdf3ae2ce282b015c547ba383 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8 --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 417a96bf424eb15cdf3ae2ce282b015c547ba383 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:08:22,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:08:22,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:08:22,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:08:22,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:08:22,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:08:22,511 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:08:22,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:08:22,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:08:22,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:08:22,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:08:22,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:08:22,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:08:22,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:08:22,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:08:22,536 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:08:22,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:08:22,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:08:22,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:08:22,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:08:22,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:08:22,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:08:22,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:08:22,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:08:22,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:08:22,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:08:22,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:08:22,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:08:22,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:08:22,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:08:22,574 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:08:22,575 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:08:22,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:08:22,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:08:22,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:08:22,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:08:22,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:08:22,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:08:22,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:08:22,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:08:22,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:08:22,584 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:08:22,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:08:22,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:08:22,630 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:08:22,631 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:08:22,631 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:08:22,631 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:08:22,631 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:08:22,632 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:08:22,632 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:08:22,632 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:08:22,633 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:08:22,633 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:08:22,634 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:08:22,634 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:08:22,634 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:08:22,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:08:22,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:08:22,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:08:22,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:08:22,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:08:22,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:08:22,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:08:22,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:08:22,637 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:08:22,637 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:08:22,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:08:22,637 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:08:22,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:08:22,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:08:22,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:08:22,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:22,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:08:22,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:08:22,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:08:22,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:08:22,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:08:22,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:08:22,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:08:22,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:08:22,642 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_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2021-10-13 08:08:22,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:08:22,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:08:22,928 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:08:22,929 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:08:22,930 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:08:22,931 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/verifythis/duplets.c [2021-10-13 08:08:23,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/ba4a1497f/a749107d52ac418f939f531969ec27bd/FLAG747196164 [2021-10-13 08:08:23,455 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:08:23,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/sv-benchmarks/c/verifythis/duplets.c [2021-10-13 08:08:23,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/ba4a1497f/a749107d52ac418f939f531969ec27bd/FLAG747196164 [2021-10-13 08:08:23,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/ba4a1497f/a749107d52ac418f939f531969ec27bd [2021-10-13 08:08:23,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:08:23,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:08:23,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:23,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:08:23,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:08:23,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:23" (1/1) ... [2021-10-13 08:08:23,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2568782f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:23, skipping insertion in model container [2021-10-13 08:08:23,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:23" (1/1) ... [2021-10-13 08:08:23,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:08:23,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:08:24,103 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_fe04babb-4490-4485-bdfe-8700fdeac217/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-13 08:08:24,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:24,165 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:08:24,178 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_fe04babb-4490-4485-bdfe-8700fdeac217/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-13 08:08:24,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:24,226 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:08:24,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24 WrapperNode [2021-10-13 08:08:24,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:24,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:24,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:08:24,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:08:24,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:24,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:08:24,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:08:24,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:08:24,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:08:24,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:08:24,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:08:24,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:08:24,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (1/1) ... [2021-10-13 08:08:24,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:24,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:24,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:08:24,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:08:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:08:24,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:08:24,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:08:24,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:08:24,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:08:24,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:08:24,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:08:24,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:08:25,239 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:08:25,239 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-13 08:08:25,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:25 BoogieIcfgContainer [2021-10-13 08:08:25,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:08:25,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:08:25,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:08:25,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:08:25,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:23" (1/3) ... [2021-10-13 08:08:25,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cce75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:25, skipping insertion in model container [2021-10-13 08:08:25,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:24" (2/3) ... [2021-10-13 08:08:25,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73cce75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:25, skipping insertion in model container [2021-10-13 08:08:25,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:25" (3/3) ... [2021-10-13 08:08:25,250 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-10-13 08:08:25,255 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:08:25,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-13 08:08:25,302 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:08:25,308 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 [2021-10-13 08:08:25,308 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-13 08:08:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 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) [2021-10-13 08:08:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:08:25,326 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:25,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:08:25,327 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash 174671679, now seen corresponding path program 1 times [2021-10-13 08:08:25,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:25,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458248803] [2021-10-13 08:08:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:25,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:25,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:25,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458248803] [2021-10-13 08:08:25,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458248803] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:25,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:25,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:08:25,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021407177] [2021-10-13 08:08:25,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:08:25,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:08:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:25,602 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:25,636 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2021-10-13 08:08:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:08:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:08:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:25,646 INFO L225 Difference]: With dead ends: 73 [2021-10-13 08:08:25,646 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 08:08:25,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:08:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 08:08:25,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 25. [2021-10-13 08:08:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-10-13 08:08:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-10-13 08:08:25,680 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 5 [2021-10-13 08:08:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:25,681 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-10-13 08:08:25,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-10-13 08:08:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:08:25,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:25,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:25,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:08:25,683 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:25,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1342165999, now seen corresponding path program 1 times [2021-10-13 08:08:25,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:25,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202473783] [2021-10-13 08:08:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:25,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:25,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:25,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:25,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202473783] [2021-10-13 08:08:25,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202473783] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:25,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:25,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 08:08:25,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826072971] [2021-10-13 08:08:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:25,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:25,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:25,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:25,841 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:25,899 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-10-13 08:08:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 08:08:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:25,901 INFO L225 Difference]: With dead ends: 45 [2021-10-13 08:08:25,901 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 08:08:25,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 08:08:25,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2021-10-13 08:08:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-10-13 08:08:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-10-13 08:08:25,922 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 7 [2021-10-13 08:08:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:25,923 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-10-13 08:08:25,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-10-13 08:08:25,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:08:25,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:25,924 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:25,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:08:25,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1442233968, now seen corresponding path program 1 times [2021-10-13 08:08:25,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:25,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79659570] [2021-10-13 08:08:25,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:25,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:26,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:26,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79659570] [2021-10-13 08:08:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79659570] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:26,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:26,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:08:26,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038834433] [2021-10-13 08:08:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:08:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:08:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:08:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:08:26,082 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:26,125 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2021-10-13 08:08:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:08:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 08:08:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:26,127 INFO L225 Difference]: With dead ends: 73 [2021-10-13 08:08:26,127 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 08:08:26,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:08:26,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 08:08:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2021-10-13 08:08:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 27 states have internal predecessors, (30), 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) [2021-10-13 08:08:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-13 08:08:26,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 7 [2021-10-13 08:08:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:26,134 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-13 08:08:26,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:08:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-13 08:08:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:08:26,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:26,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:26,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:08:26,136 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash -675326368, now seen corresponding path program 1 times [2021-10-13 08:08:26,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:08:26,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183758694] [2021-10-13 08:08:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:26,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:08:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:26,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:08:26,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183758694] [2021-10-13 08:08:26,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183758694] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:08:26,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157041584] [2021-10-13 08:08:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:26,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:26,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:26,245 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:26,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:08:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:08:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:26,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:26,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157041584] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:26,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599435294] [2021-10-13 08:08:26,468 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 08:08:26,469 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:08:26,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:08:26,480 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:08:26,481 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:08:26,535 INFO L180 QuantifierPusher]: treesize reduction 18, result has 95.7 percent of original size [2021-10-13 08:08:26,544 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:08:26,545 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:26,545 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 08:08:26,547 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:08:26,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:26,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-10-13 08:08:26,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:08:26,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:26,552 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-13 08:08:26,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 402 [2021-10-13 08:08:26,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:08:26,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:08:26,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:08:26,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:26,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:08:26,630 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:26,631 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:08:26,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:08:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:26,951 INFO L354 Elim1Store]: treesize reduction 244, result has 7.9 percent of original size [2021-10-13 08:08:26,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 95 treesize of output 94 [2021-10-13 08:08:26,954 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:26,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-13 08:08:26,963 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:26,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 76 [2021-10-13 08:08:26,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 08:08:26,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:08:27,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:27,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:08:27,064 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 346 [2021-10-13 08:08:27,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:08:27,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:776, output treesize:346 [2021-10-13 08:08:27,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:27,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:27,282 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_54| 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) [2021-10-13 08:08:27,286 INFO L168 Benchmark]: Toolchain (without parser) took 3456.14 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 64.0 MB in the beginning and 67.2 MB in the end (delta: -3.2 MB). Peak memory consumption was 31.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:27,286 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory was 46.7 MB in the beginning and 46.7 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:27,287 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.37 ms. Allocated memory is still 98.6 MB. Free memory was 63.9 MB in the beginning and 73.9 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:27,287 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.54 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 71.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:27,288 INFO L168 Benchmark]: Boogie Preprocessor took 62.83 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:27,289 INFO L168 Benchmark]: RCFGBuilder took 881.52 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 71.3 MB in the end (delta: -973.3 kB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:27,289 INFO L168 Benchmark]: TraceAbstraction took 2040.97 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 70.9 MB in the beginning and 67.2 MB in the end (delta: 3.7 MB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:27,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 73.4 MB. Free memory was 46.7 MB in the beginning and 46.7 MB in the end (delta: 30.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 396.37 ms. Allocated memory is still 98.6 MB. Free memory was 63.9 MB in the beginning and 73.9 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.54 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 71.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.83 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 70.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 881.52 ms. Allocated memory is still 98.6 MB. Free memory was 70.4 MB in the beginning and 71.3 MB in the end (delta: -973.3 kB). Peak memory consumption was 30.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2040.97 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 70.9 MB in the beginning and 67.2 MB in the end (delta: 3.7 MB). Peak memory consumption was 37.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_54| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_54|: 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. [2021-10-13 08:08:27,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 08:08:29,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:08:29,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:08:29,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:08:29,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:08:29,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:08:29,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:08:29,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:08:29,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:08:29,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:08:29,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:08:29,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:08:29,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:08:29,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:08:29,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:08:29,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:08:29,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:08:29,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:08:29,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:08:29,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:08:29,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:08:29,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:08:29,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:08:29,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:08:29,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:08:29,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:08:29,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:08:29,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:08:29,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:08:29,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:08:29,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:08:29,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:08:29,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:08:29,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:08:29,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:08:29,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:08:29,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:08:29,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:08:29,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:08:29,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:08:29,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:08:29,819 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:08:29,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:08:29,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:08:29,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:08:29,862 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:08:29,862 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:08:29,863 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:08:29,863 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:08:29,863 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:08:29,863 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:08:29,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:08:29,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:08:29,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:08:29,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:08:29,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:08:29,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:08:29,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:08:29,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:08:29,867 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:08:29,867 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:08:29,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:08:29,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:08:29,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:08:29,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:08:29,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:08:29,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:08:29,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:08:29,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:29,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:08:29,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:08:29,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:08:29,869 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:08:29,869 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:29,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:08:29,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:08:29,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:08:29,870 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_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 417a96bf424eb15cdf3ae2ce282b015c547ba383 [2021-10-13 08:08:30,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:08:30,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:08:30,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:08:30,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:08:30,304 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:08:30,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/verifythis/duplets.c [2021-10-13 08:08:30,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/c3c63c5c1/2e246f13c0ac431daabc19e6f1298e15/FLAGded7be972 [2021-10-13 08:08:30,949 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:08:30,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/sv-benchmarks/c/verifythis/duplets.c [2021-10-13 08:08:30,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/c3c63c5c1/2e246f13c0ac431daabc19e6f1298e15/FLAGded7be972 [2021-10-13 08:08:31,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/data/c3c63c5c1/2e246f13c0ac431daabc19e6f1298e15 [2021-10-13 08:08:31,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:08:31,307 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:08:31,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:31,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:08:31,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:08:31,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d1838de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31, skipping insertion in model container [2021-10-13 08:08:31,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:08:31,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:08:31,473 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_fe04babb-4490-4485-bdfe-8700fdeac217/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-13 08:08:31,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:31,524 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:08:31,534 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_fe04babb-4490-4485-bdfe-8700fdeac217/sv-benchmarks/c/verifythis/duplets.c[485,498] [2021-10-13 08:08:31,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:08:31,581 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:08:31,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31 WrapperNode [2021-10-13 08:08:31,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:08:31,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:31,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:08:31,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:08:31,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:08:31,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:08:31,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:08:31,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:08:31,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,680 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:08:31,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:08:31,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:08:31,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:08:31,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (1/1) ... [2021-10-13 08:08:31,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:08:31,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:31,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:08:31,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:08:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:08:31,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:08:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:08:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:08:31,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:08:31,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:08:31,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:08:31,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:08:32,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:08:32,328 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-13 08:08:32,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:32 BoogieIcfgContainer [2021-10-13 08:08:32,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:08:32,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:08:32,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:08:32,340 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:08:32,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:31" (1/3) ... [2021-10-13 08:08:32,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f92074b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:32, skipping insertion in model container [2021-10-13 08:08:32,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:31" (2/3) ... [2021-10-13 08:08:32,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f92074b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:32, skipping insertion in model container [2021-10-13 08:08:32,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:32" (3/3) ... [2021-10-13 08:08:32,345 INFO L111 eAbstractionObserver]: Analyzing ICFG duplets.c [2021-10-13 08:08:32,350 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:08:32,350 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-10-13 08:08:32,436 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:08:32,447 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 [2021-10-13 08:08:32,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-13 08:08:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 40 states have (on average 1.525) internal successors, (61), 45 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) [2021-10-13 08:08:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:08:32,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:32,481 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:32,481 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash 655320983, now seen corresponding path program 1 times [2021-10-13 08:08:32,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:32,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131513950] [2021-10-13 08:08:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:32,510 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:32,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:32,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:32,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:08:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:08:32,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:32,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:32,826 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:32,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131513950] [2021-10-13 08:08:32,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131513950] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:32,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:32,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:08:32,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128186632] [2021-10-13 08:08:32,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:08:32,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:08:32,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:08:32,849 INFO L87 Difference]: Start difference. First operand has 46 states, 40 states have (on average 1.525) internal successors, (61), 45 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) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-10-13 08:08:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:32,876 INFO L93 Difference]: Finished difference Result 89 states and 118 transitions. [2021-10-13 08:08:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:08:32,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2021-10-13 08:08:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:32,886 INFO L225 Difference]: With dead ends: 89 [2021-10-13 08:08:32,887 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 08:08:32,890 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:08:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 08:08:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-13 08:08:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 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) [2021-10-13 08:08:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-10-13 08:08:32,928 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2021-10-13 08:08:32,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:32,929 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-10-13 08:08:32,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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) [2021-10-13 08:08:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-10-13 08:08:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:08:32,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:32,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:32,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:33,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:33,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:33,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1826916331, now seen corresponding path program 1 times [2021-10-13 08:08:33,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:33,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521489278] [2021-10-13 08:08:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:33,144 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:33,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:33,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:08:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:08:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:34,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:34,889 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:34,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521489278] [2021-10-13 08:08:34,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521489278] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:34,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:34,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 9] imperfect sequences [] total 18 [2021-10-13 08:08:34,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481650827] [2021-10-13 08:08:34,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 08:08:34,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:34,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 08:08:34,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:08:34,895 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2021-10-13 08:08:36,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:36,252 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-10-13 08:08:36,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:08:36,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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 17 [2021-10-13 08:08:36,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:36,255 INFO L225 Difference]: With dead ends: 121 [2021-10-13 08:08:36,255 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 08:08:36,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1586.0ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-10-13 08:08:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 08:08:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 48. [2021-10-13 08:08:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.255813953488372) internal successors, (54), 47 states have internal predecessors, (54), 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) [2021-10-13 08:08:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-13 08:08:36,266 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 17 [2021-10-13 08:08:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:36,267 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-13 08:08:36,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2021-10-13 08:08:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-13 08:08:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:08:36,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:36,268 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:36,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:36,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:36,478 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:36,479 INFO L82 PathProgramCache]: Analyzing trace with hash -756845843, now seen corresponding path program 1 times [2021-10-13 08:08:36,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:36,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455832156] [2021-10-13 08:08:36,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:36,480 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:36,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:36,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:08:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:08:36,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:36,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:36,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:36,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455832156] [2021-10-13 08:08:36,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455832156] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:36,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:36,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:08:36,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764532689] [2021-10-13 08:08:36,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:08:36,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:08:36,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:08:36,733 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-10-13 08:08:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:36,818 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-10-13 08:08:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:08:36,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 18 [2021-10-13 08:08:36,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:36,821 INFO L225 Difference]: With dead ends: 72 [2021-10-13 08:08:36,821 INFO L226 Difference]: Without dead ends: 70 [2021-10-13 08:08:36,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:08:36,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-13 08:08:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-10-13 08:08:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 49 states have internal predecessors, (56), 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) [2021-10-13 08:08:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-10-13 08:08:36,837 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 18 [2021-10-13 08:08:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:36,837 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-10-13 08:08:36,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-10-13 08:08:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-10-13 08:08:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 08:08:36,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:36,839 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] [2021-10-13 08:08:36,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:37,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:37,057 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash 69607633, now seen corresponding path program 1 times [2021-10-13 08:08:37,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:37,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958749346] [2021-10-13 08:08:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:37,060 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:37,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:37,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:08:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:08:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:37,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-13 08:08:37,413 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:08:37,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 19 [2021-10-13 08:08:37,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:08:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:37,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:37,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-10-13 08:08:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:37,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:37,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958749346] [2021-10-13 08:08:37,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958749346] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:37,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:37,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-13 08:08:37,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954189086] [2021-10-13 08:08:37,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:08:37,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:08:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:08:37,739 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2021-10-13 08:08:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:37,994 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-10-13 08:08:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:08:37,995 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 22 [2021-10-13 08:08:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:37,996 INFO L225 Difference]: With dead ends: 116 [2021-10-13 08:08:37,997 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 08:08:37,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:08:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 08:08:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2021-10-13 08:08:38,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 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) [2021-10-13 08:08:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2021-10-13 08:08:38,007 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 22 [2021-10-13 08:08:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:38,008 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2021-10-13 08:08:38,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2021-10-13 08:08:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2021-10-13 08:08:38,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 08:08:38,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:38,009 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] [2021-10-13 08:08:38,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:38,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:38,221 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 69548051, now seen corresponding path program 1 times [2021-10-13 08:08:38,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:38,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248560105] [2021-10-13 08:08:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:38,223 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:38,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:38,224 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:38,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:08:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 08:08:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:38,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-13 08:08:38,763 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 08:08:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 19 [2021-10-13 08:08:38,941 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 08:08:38,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2021-10-13 08:08:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:38,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:39,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2021-10-13 08:08:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:39,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:39,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248560105] [2021-10-13 08:08:39,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248560105] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:39,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:39,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 15 [2021-10-13 08:08:39,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239110534] [2021-10-13 08:08:39,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 08:08:39,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 08:08:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:08:39,549 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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) [2021-10-13 08:08:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:42,716 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2021-10-13 08:08:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 08:08:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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 22 [2021-10-13 08:08:42,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:42,720 INFO L225 Difference]: With dead ends: 148 [2021-10-13 08:08:42,720 INFO L226 Difference]: Without dead ends: 146 [2021-10-13 08:08:42,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2870.9ms TimeCoverageRelationStatistics Valid=438, Invalid=1044, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 08:08:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-13 08:08:42,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 65. [2021-10-13 08:08:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.25) internal successors, (75), 64 states have internal predecessors, (75), 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) [2021-10-13 08:08:42,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-10-13 08:08:42,733 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 22 [2021-10-13 08:08:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:42,733 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-10-13 08:08:42,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 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) [2021-10-13 08:08:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-10-13 08:08:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 08:08:42,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:42,735 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:42,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:42,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:42,950 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:42,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:42,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1712571403, now seen corresponding path program 1 times [2021-10-13 08:08:42,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:42,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234011371] [2021-10-13 08:08:42,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:42,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:42,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:42,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:42,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:08:43,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:43,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:08:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:08:44,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:08:44,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:44,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234011371] [2021-10-13 08:08:44,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234011371] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:44,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:44,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 20 [2021-10-13 08:08:44,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896129578] [2021-10-13 08:08:44,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 08:08:44,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:44,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 08:08:44,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-13 08:08:44,519 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2021-10-13 08:08:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:46,188 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-10-13 08:08:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 08:08:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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 23 [2021-10-13 08:08:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:46,190 INFO L225 Difference]: With dead ends: 177 [2021-10-13 08:08:46,191 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 08:08:46,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1870.5ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-10-13 08:08:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 08:08:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 66. [2021-10-13 08:08:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 65 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) [2021-10-13 08:08:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-10-13 08:08:46,211 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 23 [2021-10-13 08:08:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:46,211 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-10-13 08:08:46,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 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) [2021-10-13 08:08:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-10-13 08:08:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:08:46,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:46,214 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, 1, 1] [2021-10-13 08:08:46,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:46,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:46,426 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:46,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181769, now seen corresponding path program 1 times [2021-10-13 08:08:46,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:46,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031098798] [2021-10-13 08:08:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:46,427 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:46,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:46,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:46,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:08:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:46,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:08:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:46,808 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 08:08:46,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 08:08:46,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-10-13 08:08:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:46,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:46,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 150 [2021-10-13 08:08:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:47,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:47,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031098798] [2021-10-13 08:08:47,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031098798] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:47,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:47,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-13 08:08:47,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806494908] [2021-10-13 08:08:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:08:47,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:08:47,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:08:47,307 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2021-10-13 08:08:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:47,720 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2021-10-13 08:08:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 08:08:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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 26 [2021-10-13 08:08:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:47,722 INFO L225 Difference]: With dead ends: 206 [2021-10-13 08:08:47,722 INFO L226 Difference]: Without dead ends: 194 [2021-10-13 08:08:47,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:08:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-13 08:08:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 78. [2021-10-13 08:08:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 77 states have internal predecessors, (91), 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) [2021-10-13 08:08:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-10-13 08:08:47,736 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 26 [2021-10-13 08:08:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:47,737 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-10-13 08:08:47,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 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) [2021-10-13 08:08:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-10-13 08:08:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:08:47,738 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:47,738 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, 1, 1] [2021-10-13 08:08:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:47,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:47,950 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2028241351, now seen corresponding path program 1 times [2021-10-13 08:08:47,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:47,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605902703] [2021-10-13 08:08:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:47,952 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:47,953 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:47,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:08:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:08:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:48,500 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-10-13 08:08:48,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-10-13 08:08:48,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2021-10-13 08:08:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:48,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:48,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 150 [2021-10-13 08:08:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:49,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:49,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605902703] [2021-10-13 08:08:49,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605902703] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:08:49,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:49,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 15 [2021-10-13 08:08:49,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775233366] [2021-10-13 08:08:49,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 08:08:49,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:49,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 08:08:49,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:08:49,179 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2021-10-13 08:08:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:08:51,566 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2021-10-13 08:08:51,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 08:08:51,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 26 [2021-10-13 08:08:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:08:51,569 INFO L225 Difference]: With dead ends: 173 [2021-10-13 08:08:51,569 INFO L226 Difference]: Without dead ends: 171 [2021-10-13 08:08:51,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 2046.1ms TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 08:08:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-13 08:08:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 82. [2021-10-13 08:08:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 81 states have internal predecessors, (96), 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) [2021-10-13 08:08:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-10-13 08:08:51,583 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 26 [2021-10-13 08:08:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:08:51,584 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-10-13 08:08:51,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2021-10-13 08:08:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-10-13 08:08:51,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 08:08:51,585 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:08:51,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:08:51,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 08:08:51,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:51,798 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-10-13 08:08:51,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:08:51,798 INFO L82 PathProgramCache]: Analyzing trace with hash -760559199, now seen corresponding path program 1 times [2021-10-13 08:08:51,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:08:51,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102673399] [2021-10-13 08:08:51,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:51,799 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:08:51,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:08:51,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:08:51,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:08:52,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 08:08:52,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:52,927 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 08:08:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-10-13 08:08:53,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:53,470 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-10-13 08:08:53,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 70 [2021-10-13 08:08:53,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:08:53,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102673399] [2021-10-13 08:08:53,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 08:08:53,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95325524] [2021-10-13 08:08:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:53,538 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:08:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:08:53,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:08:53,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 08:08:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 08:08:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:54,673 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 08:08:54,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-10-13 08:08:55,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:55,254 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-10-13 08:08:55,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 70 [2021-10-13 08:08:55,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 08:08:55,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552070840] [2021-10-13 08:08:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:08:55,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:55,322 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:55,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 08:08:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:08:55,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 08:08:55,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:56,144 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-10-13 08:08:56,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-10-13 08:08:56,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:08:56,609 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-10-13 08:08:56,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 70 [2021-10-13 08:08:56,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 08:08:56,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:08:56,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 08:08:56,685 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-13 08:08:56,685 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 08:08:56,691 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:56,693 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:56,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:56,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:56,694 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:08:56,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:56,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:57,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:08:57,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe04babb-4490-4485-bdfe-8700fdeac217/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:08:57,310 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:08:57,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:08:57 BoogieIcfgContainer [2021-10-13 08:08:57,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:08:57,334 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:08:57,334 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:08:57,334 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:08:57,335 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:32" (3/4) ... [2021-10-13 08:08:57,338 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 08:08:57,338 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:08:57,339 INFO L168 Benchmark]: Toolchain (without parser) took 26031.41 ms. Allocated memory was 69.2 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Free memory was 51.3 MB in the beginning and 42.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 44.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,339 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 50.6 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:57,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.44 ms. Allocated memory is still 69.2 MB. Free memory was 51.0 MB in the beginning and 53.7 MB in the end (delta: -2.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,340 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.39 ms. Allocated memory is still 69.2 MB. Free memory was 53.7 MB in the beginning and 51.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,340 INFO L168 Benchmark]: Boogie Preprocessor took 31.09 ms. Allocated memory is still 69.2 MB. Free memory was 51.6 MB in the beginning and 50.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:57,340 INFO L168 Benchmark]: RCFGBuilder took 630.28 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 36.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,341 INFO L168 Benchmark]: TraceAbstraction took 25001.73 ms. Allocated memory was 69.2 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Free memory was 35.4 MB in the beginning and 42.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:08:57,341 INFO L168 Benchmark]: Witness Printer took 4.06 ms. Allocated memory is still 104.9 MB. Free memory is still 42.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:08:57,347 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 69.2 MB. Free memory was 50.7 MB in the beginning and 50.6 MB in the end (delta: 54.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 276.44 ms. Allocated memory is still 69.2 MB. Free memory was 51.0 MB in the beginning and 53.7 MB in the end (delta: -2.6 MB). Peak memory consumption was 14.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 80.39 ms. Allocated memory is still 69.2 MB. Free memory was 53.7 MB in the beginning and 51.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.09 ms. Allocated memory is still 69.2 MB. Free memory was 51.6 MB in the beginning and 50.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 630.28 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 36.1 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25001.73 ms. Allocated memory was 69.2 MB in the beginning and 104.9 MB in the end (delta: 35.7 MB). Free memory was 35.4 MB in the beginning and 42.3 MB in the end (delta: -6.9 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.06 ms. Allocated memory is still 104.9 MB. Free memory is still 42.3 MB. There was no memory consumed. 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 - UnprovableResult [Line: 10]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L49] int n = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L52] int *a = calloc(n, sizeof(int)); [L20] int i = __VERIFIER_nondet_int(); [L21] int j = __VERIFIER_nondet_int(); [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L16] COND FALSE !(!cond) [L27] int x = __VERIFIER_nondet_int(); [L29] a[i] = x [L30] a[j] = x [L56] int i,j; [L34] int i,j; [L36] i=0 [L36] COND TRUE i