./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.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_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/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_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/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_b2bfa123-8361-4d52-9032-d1ae4dad9502/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 e095661a00784e6d7da38858d8505be229f1ade1 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/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_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/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_b2bfa123-8361-4d52-9032-d1ae4dad9502/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 e095661a00784e6d7da38858d8505be229f1ade1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:00:21,141 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:00:21,143 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:00:21,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:00:21,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:00:21,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:00:21,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:00:21,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:00:21,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:00:21,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:00:21,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:00:21,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:00:21,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:00:21,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:00:21,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:00:21,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:00:21,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:00:21,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:00:21,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:00:21,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:00:21,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:00:21,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:00:21,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:00:21,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:00:21,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:00:21,220 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:00:21,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:00:21,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:00:21,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:00:21,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:00:21,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:00:21,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:00:21,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:00:21,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:00:21,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:00:21,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:00:21,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:00:21,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:00:21,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:00:21,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:00:21,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:00:21,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:00:21,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:00:21,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:00:21,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:00:21,288 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:00:21,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:00:21,289 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:00:21,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:00:21,289 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:00:21,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:00:21,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:00:21,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:00:21,291 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:00:21,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:00:21,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:00:21,292 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:00:21,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:00:21,293 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:00:21,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:00:21,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:00:21,294 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:00:21,294 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:00:21,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:00:21,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:00:21,295 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:00:21,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:00:21,295 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:00:21,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:00:21,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:00:21,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:00:21,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:00:21,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:00:21,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:00:21,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:00:21,299 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:00:21,299 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:00:21,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:00:21,299 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:00:21,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:00:21,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:00:21,300 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_b2bfa123-8361-4d52-9032-d1ae4dad9502/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e095661a00784e6d7da38858d8505be229f1ade1 [2021-10-13 07:00:21,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:00:21,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:00:21,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:00:21,624 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:00:21,625 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:00:21,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2021-10-13 07:00:21,687 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/f042f8aca/dc2eb6853ff04f32b53535540345765a/FLAGd7743436f [2021-10-13 07:00:22,228 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:00:22,229 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2021-10-13 07:00:22,241 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/f042f8aca/dc2eb6853ff04f32b53535540345765a/FLAGd7743436f [2021-10-13 07:00:22,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/f042f8aca/dc2eb6853ff04f32b53535540345765a [2021-10-13 07:00:22,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:00:22,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:00:22,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:00:22,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:00:22,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:00:22,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb0990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22, skipping insertion in model container [2021-10-13 07:00:22,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:00:22,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:00:22,772 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_b2bfa123-8361-4d52-9032-d1ae4dad9502/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2021-10-13 07:00:22,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:00:22,798 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:00:22,812 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_b2bfa123-8361-4d52-9032-d1ae4dad9502/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2021-10-13 07:00:22,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:00:22,833 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:00:22,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22 WrapperNode [2021-10-13 07:00:22,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:00:22,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:00:22,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:00:22,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:00:22,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:00:22,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:00:22,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:00:22,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:00:22,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:00:22,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:00:22,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:00:22,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:00:22,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (1/1) ... [2021-10-13 07:00:22,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:00:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:22,990 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:00:22,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:00:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:00:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:00:23,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:00:23,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:00:23,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:00:23,361 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-13 07:00:23,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:00:23 BoogieIcfgContainer [2021-10-13 07:00:23,364 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:00:23,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:00:23,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:00:23,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:00:23,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:00:22" (1/3) ... [2021-10-13 07:00:23,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3053f9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:00:23, skipping insertion in model container [2021-10-13 07:00:23,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:22" (2/3) ... [2021-10-13 07:00:23,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3053f9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:00:23, skipping insertion in model container [2021-10-13 07:00:23,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:00:23" (3/3) ... [2021-10-13 07:00:23,372 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.c [2021-10-13 07:00:23,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:00:23,378 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-13 07:00:23,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:00:23,493 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 07:00:23,493 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-13 07:00:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:00:23,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:23,526 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:00:23,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash 143366306, now seen corresponding path program 1 times [2021-10-13 07:00:23,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:23,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446963213] [2021-10-13 07:00:23,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:23,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:23,839 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 07:00:23,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:23,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446963213] [2021-10-13 07:00:23,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446963213] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:23,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:23,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:00:23,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170440053] [2021-10-13 07:00:23,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:00:23,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:00:23,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:00:23,875 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:24,017 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2021-10-13 07:00:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:00:24,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:00:24,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:24,030 INFO L225 Difference]: With dead ends: 92 [2021-10-13 07:00:24,031 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 07:00:24,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 07:00:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-10-13 07:00:24,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.36) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-13 07:00:24,085 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 5 [2021-10-13 07:00:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:24,086 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-13 07:00:24,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:24,091 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-13 07:00:24,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:00:24,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:24,092 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:24,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:00:24,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:24,099 INFO L82 PathProgramCache]: Analyzing trace with hash 335485317, now seen corresponding path program 1 times [2021-10-13 07:00:24,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:24,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976295847] [2021-10-13 07:00:24,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:24,100 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:24,166 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 07:00:24,167 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:24,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976295847] [2021-10-13 07:00:24,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976295847] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:24,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:24,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:00:24,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680228705] [2021-10-13 07:00:24,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:00:24,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:00:24,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:00:24,172 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:24,192 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-10-13 07:00:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:00:24,192 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 07:00:24,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:24,193 INFO L225 Difference]: With dead ends: 51 [2021-10-13 07:00:24,194 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:00:24,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:00:24,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:00:24,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-13 07:00:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-10-13 07:00:24,201 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 7 [2021-10-13 07:00:24,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:24,217 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-10-13 07:00:24,218 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 07:00:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-10-13 07:00:24,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:00:24,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:24,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:24,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:00:24,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:24,220 INFO L82 PathProgramCache]: Analyzing trace with hash 336222149, now seen corresponding path program 1 times [2021-10-13 07:00:24,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:24,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257942124] [2021-10-13 07:00:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:24,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:24,321 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 07:00:24,322 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:24,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257942124] [2021-10-13 07:00:24,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257942124] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:24,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:24,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:00:24,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376184714] [2021-10-13 07:00:24,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:00:24,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:24,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:00:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:00:24,325 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:24,419 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-10-13 07:00:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:00:24,420 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 07:00:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:24,422 INFO L225 Difference]: With dead ends: 51 [2021-10-13 07:00:24,422 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 07:00:24,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 07:00:24,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2021-10-13 07:00:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-10-13 07:00:24,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 7 [2021-10-13 07:00:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:24,440 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-10-13 07:00:24,441 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 07:00:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-10-13 07:00:24,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:00:24,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:24,441 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:24,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:00:24,442 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash 987093896, now seen corresponding path program 1 times [2021-10-13 07:00:24,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:24,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592143413] [2021-10-13 07:00:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:24,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:24,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:00:24,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234987302] [2021-10-13 07:00:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:24,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:24,481 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:24,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:00:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:00:24,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:24,804 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 07:00:24,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:24,892 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 07:00:24,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:24,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592143413] [2021-10-13 07:00:24,893 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:00:24,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234987302] [2021-10-13 07:00:24,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234987302] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:24,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:24,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:00:24,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049231328] [2021-10-13 07:00:24,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:00:24,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:24,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:00:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:24,903 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:25,436 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2021-10-13 07:00:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:00:25,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:00:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:25,437 INFO L225 Difference]: With dead ends: 88 [2021-10-13 07:00:25,437 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 07:00:25,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:00:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 07:00:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-10-13 07:00:25,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 47 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 07:00:25,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-10-13 07:00:25,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 9 [2021-10-13 07:00:25,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:25,447 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-10-13 07:00:25,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:25,448 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-10-13 07:00:25,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:00:25,449 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:25,449 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:25,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 07:00:25,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:25,677 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash -419417998, now seen corresponding path program 1 times [2021-10-13 07:00:25,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:25,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109829742] [2021-10-13 07:00:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:25,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:25,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:00:25,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279464963] [2021-10-13 07:00:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:25,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:25,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:25,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:00:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:25,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:00:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:25,958 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 07:00:25,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:26,050 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 07:00:26,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:26,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109829742] [2021-10-13 07:00:26,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:00:26,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279464963] [2021-10-13 07:00:26,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279464963] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:26,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:26,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:00:26,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897539126] [2021-10-13 07:00:26,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:00:26,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:00:26,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:00:26,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:26,057 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:26,131 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-10-13 07:00:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:00:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:00:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:26,140 INFO L225 Difference]: With dead ends: 59 [2021-10-13 07:00:26,141 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 07:00:26,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:00:26,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 07:00:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-10-13 07:00:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-13 07:00:26,155 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 13 [2021-10-13 07:00:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:26,156 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-13 07:00:26,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-13 07:00:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:00:26,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:26,160 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:26,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:26,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:26,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:26,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:26,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1277720883, now seen corresponding path program 1 times [2021-10-13 07:00:26,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:00:26,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518559860] [2021-10-13 07:00:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:26,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:00:26,391 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:00:26,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250765947] [2021-10-13 07:00:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:26,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:26,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:26,393 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:00:26,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 07:00:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:00:26,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:26,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:26,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:00:26,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518559860] [2021-10-13 07:00:26,632 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:00:26,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250765947] [2021-10-13 07:00:26,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250765947] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:00:26,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1534739466] [2021-10-13 07:00:26,661 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-10-13 07:00:26,661 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:00:26,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:00:26,682 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:00:26,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:00:26,724 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:26,732 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:00:26,733 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:26,734 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:00:26,734 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:00:26,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:26,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:00:26,740 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-13 07:00:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:00:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:00:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:00:26,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:00:26,792 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:26,792 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:00:26,793 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:26,794 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:00:26,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:00:26,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:00:26,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:26,823 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:00:26,826 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 145 [2021-10-13 07:00:26,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:00:26,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:142, output treesize:145 [2021-10-13 07:00:26,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:27,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:00:27,053 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_10| 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 07:00:27,057 INFO L168 Benchmark]: Toolchain (without parser) took 4489.68 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 47.4 MB in the beginning and 42.5 MB in the end (delta: 4.9 MB). Peak memory consumption was 24.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:27,057 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory is still 63.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:00:27,058 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.75 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 47.2 MB in the beginning and 81.2 MB in the end (delta: -34.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:27,059 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.99 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 79.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:27,059 INFO L168 Benchmark]: Boogie Preprocessor took 34.77 ms. Allocated memory is still 104.9 MB. Free memory was 79.7 MB in the beginning and 78.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:00:27,060 INFO L168 Benchmark]: RCFGBuilder took 418.35 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 65.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:27,060 INFO L168 Benchmark]: TraceAbstraction took 3689.98 ms. Allocated memory is still 104.9 MB. Free memory was 65.0 MB in the beginning and 42.5 MB in the end (delta: 22.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:27,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 86.0 MB. Free memory is still 63.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.75 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 47.2 MB in the beginning and 81.2 MB in the end (delta: -34.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.99 ms. Allocated memory is still 104.9 MB. Free memory was 81.2 MB in the beginning and 79.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.77 ms. Allocated memory is still 104.9 MB. Free memory was 79.7 MB in the beginning and 78.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 418.35 ms. Allocated memory is still 104.9 MB. Free memory was 78.5 MB in the beginning and 65.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3689.98 ms. Allocated memory is still 104.9 MB. Free memory was 65.0 MB in the beginning and 42.5 MB in the end (delta: 22.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: 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 07:00:27,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/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 07:00:29,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:00:29,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:00:29,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:00:29,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:00:29,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:00:29,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:00:29,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:00:29,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:00:29,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:00:29,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:00:29,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:00:29,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:00:29,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:00:29,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:00:29,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:00:29,981 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:00:29,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:00:29,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:00:29,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:00:29,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:00:29,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:00:30,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:00:30,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:00:30,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:00:30,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:00:30,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:00:30,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:00:30,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:00:30,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:00:30,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:00:30,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:00:30,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:00:30,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:00:30,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:00:30,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:00:30,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:00:30,027 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:00:30,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:00:30,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:00:30,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:00:30,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:00:30,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:00:30,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:00:30,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:00:30,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:00:30,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:00:30,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:00:30,091 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:00:30,091 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:00:30,091 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:00:30,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:00:30,095 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:00:30,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:00:30,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:00:30,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:00:30,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:00:30,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:00:30,097 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:00:30,097 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:00:30,098 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:00:30,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:00:30,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:00:30,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:00:30,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:00:30,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:00:30,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:00:30,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:00:30,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:00:30,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:00:30,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:00:30,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:00:30,102 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:00:30,103 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:00:30,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:00:30,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:00:30,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:00:30,105 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_b2bfa123-8361-4d52-9032-d1ae4dad9502/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e095661a00784e6d7da38858d8505be229f1ade1 [2021-10-13 07:00:30,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:00:30,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:00:30,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:00:30,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:00:30,614 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:00:30,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2021-10-13 07:00:30,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/da82975cc/4d6c34296a9c44559b1392a27c2ac1fc/FLAGe0e055d66 [2021-10-13 07:00:31,332 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:00:31,333 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c [2021-10-13 07:00:31,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/da82975cc/4d6c34296a9c44559b1392a27c2ac1fc/FLAGe0e055d66 [2021-10-13 07:00:31,643 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/data/da82975cc/4d6c34296a9c44559b1392a27c2ac1fc [2021-10-13 07:00:31,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:00:31,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:00:31,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:00:31,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:00:31,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:00:31,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:00:31" (1/1) ... [2021-10-13 07:00:31,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386adc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:31, skipping insertion in model container [2021-10-13 07:00:31,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:00:31" (1/1) ... [2021-10-13 07:00:31,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:00:31,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:00:31,850 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_b2bfa123-8361-4d52-9032-d1ae4dad9502/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2021-10-13 07:00:31,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:00:31,917 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:00:31,946 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_b2bfa123-8361-4d52-9032-d1ae4dad9502/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound2.c[526,539] [2021-10-13 07:00:31,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:00:32,003 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:00:32,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32 WrapperNode [2021-10-13 07:00:32,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:00:32,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:00:32,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:00:32,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:00:32,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:00:32,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:00:32,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:00:32,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:00:32,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:00:32,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:00:32,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:00:32,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:00:32,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (1/1) ... [2021-10-13 07:00:32,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:00:32,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:00:32,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:00:32,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:00:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:00:32,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:00:32,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:00:32,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:00:32,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:00:32,785 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-10-13 07:00:32,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:00:32 BoogieIcfgContainer [2021-10-13 07:00:32,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:00:32,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:00:32,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:00:32,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:00:32,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:00:31" (1/3) ... [2021-10-13 07:00:32,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be88a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:00:32, skipping insertion in model container [2021-10-13 07:00:32,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:00:32" (2/3) ... [2021-10-13 07:00:32,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2be88a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:00:32, skipping insertion in model container [2021-10-13 07:00:32,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:00:32" (3/3) ... [2021-10-13 07:00:32,797 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound2.c [2021-10-13 07:00:32,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:00:32,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-13 07:00:32,852 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:00:32,860 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 07:00:32,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-13 07:00:32,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:00:32,884 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:32,885 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:00:32,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-13 07:00:32,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:32,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62866879] [2021-10-13 07:00:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:32,911 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:32,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:32,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:32,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:00:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:00:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:33,211 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 07:00:33,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:33,291 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 07:00:33,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:33,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62866879] [2021-10-13 07:00:33,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62866879] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:33,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:33,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 07:00:33,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244040101] [2021-10-13 07:00:33,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:00:33,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:00:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:33,328 INFO L87 Difference]: Start difference. First operand has 39 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 38 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:33,589 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2021-10-13 07:00:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:00:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:00:33,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:33,599 INFO L225 Difference]: With dead ends: 102 [2021-10-13 07:00:33,599 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 07:00:33,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:00:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 07:00:33,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 33. [2021-10-13 07:00:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 32 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 07:00:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-13 07:00:33,635 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2021-10-13 07:00:33,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:33,635 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-13 07:00:33,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-13 07:00:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:00:33,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:33,637 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:33,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:33,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:33,856 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:33,857 INFO L82 PathProgramCache]: Analyzing trace with hash 178921133, now seen corresponding path program 1 times [2021-10-13 07:00:33,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:33,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528262350] [2021-10-13 07:00:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:33,858 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:33,860 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:33,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:00:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:33,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:00:33,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:33,998 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 07:00:33,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:34,058 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 07:00:34,059 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:34,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528262350] [2021-10-13 07:00:34,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528262350] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:34,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:34,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 07:00:34,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400075153] [2021-10-13 07:00:34,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:00:34,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:34,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:00:34,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:00:34,063 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:34,129 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-10-13 07:00:34,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:00:34,130 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:00:34,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:34,132 INFO L225 Difference]: With dead ends: 67 [2021-10-13 07:00:34,133 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 07:00:34,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:00:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 07:00:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-10-13 07:00:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 42 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 07:00:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-10-13 07:00:34,149 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 8 [2021-10-13 07:00:34,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:34,149 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-10-13 07:00:34,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-10-13 07:00:34,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:00:34,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:34,151 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:34,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:34,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:34,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-13 07:00:34,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:34,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692298927] [2021-10-13 07:00:34,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:34,361 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:34,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:34,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:34,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:00:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:00:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:34,473 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 07:00:34,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:34,550 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 07:00:34,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:34,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692298927] [2021-10-13 07:00:34,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692298927] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:34,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:34,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 07:00:34,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035073146] [2021-10-13 07:00:34,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:00:34,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:00:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:34,554 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:34,819 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-10-13 07:00:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:00:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 07:00:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:34,821 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:00:34,821 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 07:00:34,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:00:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 07:00:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-10-13 07:00:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:34,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-10-13 07:00:34,832 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 8 [2021-10-13 07:00:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:34,832 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-10-13 07:00:34,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-10-13 07:00:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:00:34,833 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:34,834 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:34,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:35,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:35,044 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-13 07:00:35,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:35,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437938560] [2021-10-13 07:00:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:35,046 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:35,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:35,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:00:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:35,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:00:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:35,245 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 07:00:35,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:00:35,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:35,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437938560] [2021-10-13 07:00:35,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437938560] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:35,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:35,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:00:35,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155737943] [2021-10-13 07:00:35,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:00:35,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:35,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:00:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:00:35,486 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:38,248 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2021-10-13 07:00:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:00:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:00:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:38,252 INFO L225 Difference]: With dead ends: 104 [2021-10-13 07:00:38,252 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 07:00:38,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:00:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 07:00:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-10-13 07:00:38,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 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 07:00:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-10-13 07:00:38,268 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 10 [2021-10-13 07:00:38,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:38,268 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-10-13 07:00:38,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-10-13 07:00:38,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:00:38,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:38,269 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:38,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-13 07:00:38,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:38,480 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1265846374, now seen corresponding path program 1 times [2021-10-13 07:00:38,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:38,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426091758] [2021-10-13 07:00:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:38,482 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:38,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:38,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:38,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:00:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:00:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:00:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:00:38,767 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 07:00:38,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:00:38,992 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 07:00:38,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:00:38,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426091758] [2021-10-13 07:00:38,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426091758] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:00:38,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:00:38,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 07:00:38,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766442437] [2021-10-13 07:00:38,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:00:38,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:00:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:00:38,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:00:38,995 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:39,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:00:39,235 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2021-10-13 07:00:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:00:39,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:00:39,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:00:39,236 INFO L225 Difference]: With dead ends: 79 [2021-10-13 07:00:39,236 INFO L226 Difference]: Without dead ends: 67 [2021-10-13 07:00:39,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:00:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-13 07:00:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-13 07:00:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2678571428571428) internal successors, (71), 60 states have internal predecessors, (71), 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 07:00:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-10-13 07:00:39,255 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 14 [2021-10-13 07:00:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:00:39,255 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-10-13 07:00:39,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:00:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-10-13 07:00:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:00:39,258 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:00:39,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:00:39,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:39,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:39,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-13 07:00:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:00:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1057713026, now seen corresponding path program 1 times [2021-10-13 07:00:39,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:00:39,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733168664] [2021-10-13 07:00:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:00:39,471 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:00:39,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:00:39,472 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:00:39,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:00:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:00:39,612 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:00:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:00:39,732 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:00:39,733 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:00:39,734 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:39,735 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:39,736 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:39,736 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:39,736 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:39,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:39,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:00:39,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:00:39,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:00:39,944 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:00:40,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:00:40 BoogieIcfgContainer [2021-10-13 07:00:40,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:00:40,004 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:00:40,004 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:00:40,005 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:00:40,005 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:00:32" (3/4) ... [2021-10-13 07:00:40,007 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:00:40,088 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:00:40,089 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:00:40,095 INFO L168 Benchmark]: Toolchain (without parser) took 8443.86 ms. Allocated memory was 73.4 MB in the beginning and 92.3 MB in the end (delta: 18.9 MB). Free memory was 53.8 MB in the beginning and 71.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 45.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:40,096 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 73.4 MB. Free memory was 53.5 MB in the beginning and 53.4 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:00:40,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.44 ms. Allocated memory is still 73.4 MB. Free memory was 53.6 MB in the beginning and 54.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:40,096 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.55 ms. Allocated memory is still 73.4 MB. Free memory was 54.7 MB in the beginning and 53.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:00:40,097 INFO L168 Benchmark]: Boogie Preprocessor took 54.76 ms. Allocated memory is still 73.4 MB. Free memory was 53.0 MB in the beginning and 51.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:40,097 INFO L168 Benchmark]: RCFGBuilder took 665.00 ms. Allocated memory is still 73.4 MB. Free memory was 51.7 MB in the beginning and 40.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:40,098 INFO L168 Benchmark]: TraceAbstraction took 7213.80 ms. Allocated memory was 73.4 MB in the beginning and 92.3 MB in the end (delta: 18.9 MB). Free memory was 40.0 MB in the beginning and 33.5 MB in the end (delta: 6.4 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:40,098 INFO L168 Benchmark]: Witness Printer took 89.33 ms. Allocated memory is still 92.3 MB. Free memory was 33.5 MB in the beginning and 71.9 MB in the end (delta: -38.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:00:40,101 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 73.4 MB. Free memory was 53.5 MB in the beginning and 53.4 MB in the end (delta: 54.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.44 ms. Allocated memory is still 73.4 MB. Free memory was 53.6 MB in the beginning and 54.7 MB in the end (delta: -1.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.55 ms. Allocated memory is still 73.4 MB. Free memory was 54.7 MB in the beginning and 53.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.76 ms. Allocated memory is still 73.4 MB. Free memory was 53.0 MB in the beginning and 51.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 665.00 ms. Allocated memory is still 73.4 MB. Free memory was 51.7 MB in the beginning and 40.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7213.80 ms. Allocated memory was 73.4 MB in the beginning and 92.3 MB in the end (delta: 18.9 MB). Free memory was 40.0 MB in the beginning and 33.5 MB in the end (delta: 6.4 MB). Peak memory consumption was 25.6 MB. Max. memory is 16.1 GB. * Witness Printer took 89.33 ms. Allocated memory is still 92.3 MB. Free memory was 33.5 MB in the beginning and 71.9 MB in the end (delta: -38.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [counter=0] [L24] int A, B; [L25] int r, d, p, q; [L26] A = __VERIFIER_nondet_int() [L27] B = 1 [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p VAL [counter=1] [L34] EXPR counter++ VAL [counter=2] [L34] COND TRUE counter++<2 [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND FALSE !(!(cond)) VAL [counter=2] [L38] COND TRUE !(r >= d) VAL [counter=2] [L44] EXPR counter++ VAL [counter=3] [L44] COND FALSE !(counter++<2) [L15] COND FALSE !(!(cond)) VAL [counter=3] [L15] COND TRUE !(cond) VAL [counter=3] [L17] reach_error() VAL [counter=3] - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 39 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 7091.6ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 15.8ms, AutomataDifference: 3650.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 153 SDtfs, 222 SDslu, 308 SDs, 0 SdLazy, 207 SolverSat, 79 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2937.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 495.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=5, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 77.9ms AutomataMinimizationTime, 5 MinimizatonAttempts, 75 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 64.9ms SsaConstructionTime, 247.9ms SatisfiabilityAnalysisTime, 1309.5ms InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 336 SizeOfPredicates, 15 NumberOfNonLiveVariables, 200 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:00:40,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2bfa123-8361-4d52-9032-d1ae4dad9502/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...