./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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 894596aca9a1908fd868912b199c54fd3b1d0950 ....................................................................................................................................................................................................................................................................................................................................................................... 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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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 894596aca9a1908fd868912b199c54fd3b1d0950 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:38:52,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:38:52,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:38:52,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:38:52,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:38:52,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:38:52,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:38:52,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:38:52,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:38:52,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:38:52,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:38:52,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:38:52,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:38:52,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:38:52,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:38:52,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:38:52,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:38:52,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:38:52,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:38:52,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:38:52,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:38:52,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:38:52,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:38:52,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:38:52,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:38:52,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:38:52,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:38:52,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:38:52,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:38:52,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:38:52,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:38:52,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:38:52,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:38:52,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:38:52,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:38:52,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:38:52,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:38:52,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:38:52,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:38:52,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:38:52,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:38:52,480 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:38:52,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:38:52,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:38:52,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:38:52,507 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:38:52,508 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:38:52,508 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:38:52,508 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:38:52,508 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:38:52,508 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:38:52,509 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:38:52,509 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:38:52,509 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:38:52,509 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:38:52,510 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:38:52,510 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:38:52,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:38:52,511 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:38:52,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:38:52,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:38:52,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:38:52,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:38:52,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:38:52,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:38:52,512 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:38:52,513 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:38:52,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:38:52,513 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:38:52,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:38:52,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:38:52,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:38:52,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:38:52,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:38:52,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:38:52,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:38:52,515 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:38:52,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:38:52,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:38:52,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:38:52,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:38:52,516 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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 894596aca9a1908fd868912b199c54fd3b1d0950 [2021-10-13 07:38:52,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:38:52,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:38:52,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:38:52,792 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:38:52,793 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:38:52,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-13 07:38:52,874 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/7d56a5d98/bc8a8182b9174d019b3b0f8193ad9af1/FLAG7916cdcb0 [2021-10-13 07:38:53,358 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:38:53,358 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-13 07:38:53,364 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/7d56a5d98/bc8a8182b9174d019b3b0f8193ad9af1/FLAG7916cdcb0 [2021-10-13 07:38:53,743 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/7d56a5d98/bc8a8182b9174d019b3b0f8193ad9af1 [2021-10-13 07:38:53,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:38:53,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:38:53,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:38:53,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:38:53,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:38:53,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:38:53" (1/1) ... [2021-10-13 07:38:53,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769d5d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:53, skipping insertion in model container [2021-10-13 07:38:53,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:38:53" (1/1) ... [2021-10-13 07:38:53,761 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:38:53,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:38:53,958 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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-13 07:38:53,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:38:53,993 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:38:54,008 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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-13 07:38:54,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:38:54,047 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:38:54,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54 WrapperNode [2021-10-13 07:38:54,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:38:54,050 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:38:54,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:38:54,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:38:54,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:38:54,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:38:54,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:38:54,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:38:54,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:38:54,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:38:54,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:38:54,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:38:54,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (1/1) ... [2021-10-13 07:38:54,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:38:54,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:54,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:38:54,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:38:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:38:54,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:38:54,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:38:54,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:38:54,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:38:54,454 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:38:54,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:54 BoogieIcfgContainer [2021-10-13 07:38:54,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:38:54,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:38:54,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:38:54,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:38:54,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:38:53" (1/3) ... [2021-10-13 07:38:54,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179453ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:38:54, skipping insertion in model container [2021-10-13 07:38:54,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:38:54" (2/3) ... [2021-10-13 07:38:54,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@179453ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:38:54, skipping insertion in model container [2021-10-13 07:38:54,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:38:54" (3/3) ... [2021-10-13 07:38:54,465 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2021-10-13 07:38:54,470 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:38:54,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:38:54,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:38:54,525 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 07:38:54,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:38:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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 07:38:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:38:54,544 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:38:54,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:38:54,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:38:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:38:54,551 INFO L82 PathProgramCache]: Analyzing trace with hash 81490399, now seen corresponding path program 1 times [2021-10-13 07:38:54,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:38:54,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854557932] [2021-10-13 07:38:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:54,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:38:54,654 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:38:54,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814777151] [2021-10-13 07:38:54,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:38:54,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:38:54,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:38:54,657 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:38:54,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:38:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:38:54,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:38:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:38:54,931 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 07:38:54,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:14,794 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 07:39:14,794 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:39:14,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854557932] [2021-10-13 07:39:14,795 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:39:14,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814777151] [2021-10-13 07:39:14,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814777151] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:14,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:14,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:39:14,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048271675] [2021-10-13 07:39:14,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:39:14,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:39:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:39:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=11, Unknown=1, NotChecked=0, Total=20 [2021-10-13 07:39:14,821 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 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), 4 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 07:39:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:15,442 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2021-10-13 07:39:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:39:15,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 5 [2021-10-13 07:39:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:15,452 INFO L225 Difference]: With dead ends: 40 [2021-10-13 07:39:15,452 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 07:39:15,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20139.2ms TimeCoverageRelationStatistics Valid=18, Invalid=23, Unknown=1, NotChecked=0, Total=42 [2021-10-13 07:39:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 07:39:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 07:39:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 07:39:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-13 07:39:15,492 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2021-10-13 07:39:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:15,493 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-13 07:39:15,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 07:39:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-13 07:39:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:39:15,495 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:15,495 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:15,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:15,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 07:39:15,702 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:39:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash 908273882, now seen corresponding path program 1 times [2021-10-13 07:39:15,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:39:15,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260994440] [2021-10-13 07:39:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:15,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:39:15,721 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:39:15,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755289474] [2021-10-13 07:39:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:15,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:39:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:39:15,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:39:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:39:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:39:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:15,874 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 07:39:15,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:15,977 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 07:39:15,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:39:15,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260994440] [2021-10-13 07:39:15,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:39:15,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755289474] [2021-10-13 07:39:15,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755289474] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:39:15,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825327937] [2021-10-13 07:39:16,016 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 07:39:16,016 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:39:16,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:39:16,028 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:39:16,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:39:16,066 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:16,071 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:39:16,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:16,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:39:16,076 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:39:16,077 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:16,078 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:39:16,085 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-13 07:39:16,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:39:16,208 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 07:39:16,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 07:39:16,215 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:16,220 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:39:16,223 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:16,225 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:39:16,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:39:16,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:39:16,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:16,329 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:39:16,333 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 120 [2021-10-13 07:39:16,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:39:16,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:136, output treesize:120 [2021-10-13 07:39:16,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:16,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:39:16,556 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| 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 07:39:16,561 INFO L168 Benchmark]: Toolchain (without parser) took 22813.77 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 58.0 MB in the beginning and 80.5 MB in the end (delta: -22.5 MB). Peak memory consumption was 4.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:39:16,562 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory was 64.5 MB in the beginning and 64.5 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:39:16,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.51 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 57.7 MB in the beginning and 95.7 MB in the end (delta: -37.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:39:16,564 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.22 ms. Allocated memory is still 119.5 MB. Free memory was 95.7 MB in the beginning and 94.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:39:16,564 INFO L168 Benchmark]: Boogie Preprocessor took 47.14 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:39:16,565 INFO L168 Benchmark]: RCFGBuilder took 317.54 ms. Allocated memory is still 119.5 MB. Free memory was 92.8 MB in the beginning and 82.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:39:16,566 INFO L168 Benchmark]: TraceAbstraction took 22101.32 ms. Allocated memory is still 119.5 MB. Free memory was 81.6 MB in the beginning and 80.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:39:16,573 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 92.3 MB. Free memory was 64.5 MB in the beginning and 64.5 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.51 ms. Allocated memory was 92.3 MB in the beginning and 119.5 MB in the end (delta: 27.3 MB). Free memory was 57.7 MB in the beginning and 95.7 MB in the end (delta: -37.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.22 ms. Allocated memory is still 119.5 MB. Free memory was 95.7 MB in the beginning and 94.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.14 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 317.54 ms. Allocated memory is still 119.5 MB. Free memory was 92.8 MB in the beginning and 82.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 22101.32 ms. Allocated memory is still 119.5 MB. Free memory was 81.6 MB in the beginning and 80.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: 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 07:39:16,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:39:19,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:39:19,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:39:19,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:39:19,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:39:19,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:39:19,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:39:19,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:39:19,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:39:19,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:39:19,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:39:19,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:39:19,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:39:19,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:39:19,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:39:19,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:39:19,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:39:19,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:39:19,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:39:19,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:39:19,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:39:19,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:39:19,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:39:19,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:39:19,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:39:19,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:39:19,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:39:19,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:39:19,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:39:19,127 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:39:19,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:39:19,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:39:19,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:39:19,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:39:19,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:39:19,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:39:19,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:39:19,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:39:19,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:39:19,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:39:19,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:39:19,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:39:19,199 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:39:19,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:39:19,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:39:19,201 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:39:19,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:39:19,202 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:39:19,202 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:39:19,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:39:19,202 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:39:19,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:39:19,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:39:19,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:39:19,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:39:19,206 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:39:19,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:39:19,206 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:39:19,207 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:39:19,207 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:39:19,207 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:39:19,207 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:39:19,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:39:19,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:39:19,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:39:19,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:39:19,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:39:19,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:39:19,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:39:19,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:39:19,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:39:19,210 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:39:19,210 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:39:19,210 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:39:19,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:39:19,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:39:19,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:39:19,212 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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 894596aca9a1908fd868912b199c54fd3b1d0950 [2021-10-13 07:39:19,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:39:19,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:39:19,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:39:19,631 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:39:19,632 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:39:19,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-13 07:39:19,709 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/19c6a5062/579b0679986a49459af0313c4b38f565/FLAGb75ee6615 [2021-10-13 07:39:20,295 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:39:20,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c [2021-10-13 07:39:20,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/19c6a5062/579b0679986a49459af0313c4b38f565/FLAGb75ee6615 [2021-10-13 07:39:20,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/data/19c6a5062/579b0679986a49459af0313c4b38f565 [2021-10-13 07:39:20,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:39:20,653 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:39:20,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:39:20,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:39:20,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:39:20,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:20,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ad149c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20, skipping insertion in model container [2021-10-13 07:39:20,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:20,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:39:20,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:39:20,870 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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-13 07:39:20,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:39:20,900 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:39:20,914 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_e0ec5dd2-3d55-4213-81c0-692cf0474e64/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2021-10-13 07:39:20,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:39:20,948 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:39:20,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20 WrapperNode [2021-10-13 07:39:20,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:39:20,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:39:20,950 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:39:20,950 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:39:20,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:20,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:39:21,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:39:21,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:39:21,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:39:21,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,056 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:39:21,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:39:21,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:39:21,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:39:21,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (1/1) ... [2021-10-13 07:39:21,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:39:21,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:39:21,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:39:21,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:39:21,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:39:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:39:21,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:39:21,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:39:22,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:39:22,477 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:39:22,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:39:22 BoogieIcfgContainer [2021-10-13 07:39:22,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:39:22,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:39:22,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:39:22,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:39:22,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:39:20" (1/3) ... [2021-10-13 07:39:22,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718d3f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:39:22, skipping insertion in model container [2021-10-13 07:39:22,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:39:20" (2/3) ... [2021-10-13 07:39:22,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718d3f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:39:22, skipping insertion in model container [2021-10-13 07:39:22,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:39:22" (3/3) ... [2021-10-13 07:39:22,488 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2021-10-13 07:39:22,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:39:22,494 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:39:22,543 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:39:22,550 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 07:39:22,551 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:39:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 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 07:39:22,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:39:22,570 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:22,571 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:39:22,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:39:22,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:22,578 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-13 07:39:22,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:22,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095273822] [2021-10-13 07:39:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:22,592 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:22,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:22,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:22,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:39:22,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:22,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:39:22,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:23,110 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 07:39:23,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:25,843 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 07:39:25,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:25,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095273822] [2021-10-13 07:39:25,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095273822] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:39:25,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:39:25,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:39:25,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679519991] [2021-10-13 07:39:25,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:39:25,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:39:25,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:39:25,868 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.5625) internal successors, (25), 19 states have internal predecessors, (25), 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 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 07:39:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:36,917 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-10-13 07:39:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:39:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 6 [2021-10-13 07:39:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:36,925 INFO L225 Difference]: With dead ends: 68 [2021-10-13 07:39:36,926 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 07:39:36,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6926.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:39:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 07:39:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-13 07:39:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-13 07:39:36,985 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 6 [2021-10-13 07:39:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:36,986 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-13 07:39:36,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 07:39:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-13 07:39:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:39:36,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:36,987 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:36,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:37,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:39:37,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:39:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash 757648847, now seen corresponding path program 1 times [2021-10-13 07:39:37,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:37,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952143608] [2021-10-13 07:39:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:37,191 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:37,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:37,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:37,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:39:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:39:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:37,618 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 07:39:37,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:37,813 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 07:39:37,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:37,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952143608] [2021-10-13 07:39:37,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952143608] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:39:37,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [200738039] [2021-10-13 07:39:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:37,815 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:39:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:39:37,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:39:37,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 07:39:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:39:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:38,373 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 07:39:38,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:38,470 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 07:39:38,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [200738039] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:39:38,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101623414] [2021-10-13 07:39:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:38,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:39:38,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:39:38,474 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:39:38,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:39:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:38,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:39:38,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:38,826 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 07:39:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:38,906 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 07:39:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101623414] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:39:38,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:39:38,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-13 07:39:38,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771933164] [2021-10-13 07:39:38,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:39:38,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:39:38,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:39:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:39:38,910 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:39:40,850 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-10-13 07:39:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 07:39:40,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-13 07:39:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:39:40,851 INFO L225 Difference]: With dead ends: 54 [2021-10-13 07:39:40,851 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 07:39:40,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:39:40,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 07:39:40,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-10-13 07:39:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 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 07:39:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-13 07:39:40,861 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2021-10-13 07:39:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:39:40,862 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-13 07:39:40,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:39:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-13 07:39:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:39:40,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:39:40,869 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:39:40,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:41,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:41,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:39:41,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:39:41,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:39:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:39:41,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1997070616, now seen corresponding path program 1 times [2021-10-13 07:39:41,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:39:41,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411787621] [2021-10-13 07:39:41,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:41,490 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:39:41,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:39:41,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:39:41,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:39:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:41,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:39:41,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:39:42,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:39:51,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:39:51,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411787621] [2021-10-13 07:39:51,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411787621] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:39:51,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1644304883] [2021-10-13 07:39:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:51,896 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:39:51,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:39:51,901 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:39:51,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:39:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:39:52,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:39:52,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:39:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:39:58,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1644304883] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:39:58,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633875533] [2021-10-13 07:39:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:39:58,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:39:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:39:58,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:39:58,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:39:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:39:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:39:58,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:39:59,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:39:59,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:40:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:40:19,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633875533] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:40:19,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:40:19,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 8] total 13 [2021-10-13 07:40:19,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769232418] [2021-10-13 07:40:19,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 07:40:19,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:40:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 07:40:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=110, Unknown=2, NotChecked=0, Total=156 [2021-10-13 07:40:19,194 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:41:14,894 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-10-13 07:41:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 07:41:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:41:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:41:14,895 INFO L225 Difference]: With dead ends: 52 [2021-10-13 07:41:14,896 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 07:41:14,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 56856.2ms TimeCoverageRelationStatistics Valid=232, Invalid=521, Unknown=3, NotChecked=0, Total=756 [2021-10-13 07:41:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 07:41:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-10-13 07:41:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-10-13 07:41:14,927 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 13 [2021-10-13 07:41:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:41:14,927 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-10-13 07:41:14,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:41:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-10-13 07:41:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 07:41:14,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:41:14,929 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2021-10-13 07:41:14,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:15,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-13 07:41:15,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:41:15,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:41:15,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:41:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:41:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1778536670, now seen corresponding path program 1 times [2021-10-13 07:41:15,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:41:15,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87481513] [2021-10-13 07:41:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:15,531 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:41:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:41:15,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:41:15,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:41:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:41:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:18,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:41:32,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:41:32,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87481513] [2021-10-13 07:41:32,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87481513] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:32,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [184745158] [2021-10-13 07:41:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:32,202 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:41:32,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:41:32,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:41:32,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:41:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:41:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:35,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:41:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 07:41:48,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [184745158] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:41:48,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23850446] [2021-10-13 07:41:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:41:48,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:41:48,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:41:48,457 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:41:48,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:41:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:41:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:41:48,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:41:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:41:50,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 07:42:06,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23850446] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:06,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:42:06,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6, 4, 7, 5] total 10 [2021-10-13 07:42:06,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225790939] [2021-10-13 07:42:06,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:42:06,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:42:06,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:42:06,800 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:18,923 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-13 07:42:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:42:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-13 07:42:18,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:18,948 INFO L225 Difference]: With dead ends: 38 [2021-10-13 07:42:18,948 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 07:42:18,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 32910.8ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:42:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 07:42:18,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 07:42:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-13 07:42:18,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2021-10-13 07:42:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:18,954 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-13 07:42:18,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-13 07:42:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:42:18,956 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:18,956 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:19,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:19,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 07:42:19,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:19,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:19,570 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:19,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:19,571 INFO L82 PathProgramCache]: Analyzing trace with hash 754083403, now seen corresponding path program 2 times [2021-10-13 07:42:19,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:19,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184337955] [2021-10-13 07:42:19,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:19,572 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:19,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:19,573 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:19,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:42:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:20,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:42:20,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:20,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:21,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:42:21,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184337955] [2021-10-13 07:42:21,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184337955] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:21,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314435352] [2021-10-13 07:42:21,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:21,294 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:42:21,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:42:21,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:42:21,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:42:22,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:22,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:42:22,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:22,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:23,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:23,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314435352] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:23,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143065530] [2021-10-13 07:42:23,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:23,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:42:23,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:42:23,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:42:23,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:42:23,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:23,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 07:42:23,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:24,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:42:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:24,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143065530] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:42:24,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:42:24,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-10-13 07:42:24,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413596689] [2021-10-13 07:42:24,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:42:24,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:42:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:42:24,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:42:24,309 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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 07:42:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:42:30,203 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-10-13 07:42:30,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 07:42:30,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-13 07:42:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:42:30,204 INFO L225 Difference]: With dead ends: 72 [2021-10-13 07:42:30,205 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 07:42:30,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1357.0ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-10-13 07:42:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 07:42:30,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2021-10-13 07:42:30,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:42:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-13 07:42:30,215 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 23 [2021-10-13 07:42:30,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:42:30,215 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-13 07:42:30,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 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 07:42:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-13 07:42:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 07:42:30,216 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:42:30,217 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1] [2021-10-13 07:42:30,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:30,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:42:30,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 07:42:30,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:42:30,818 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:42:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:42:30,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1128495004, now seen corresponding path program 2 times [2021-10-13 07:42:30,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:42:30,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620964144] [2021-10-13 07:42:30,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:42:30,819 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:42:30,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:42:30,820 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:42:30,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:42:31,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:42:31,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:42:31,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:42:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:42:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:42:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:11,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:43:11,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620964144] [2021-10-13 07:43:11,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620964144] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:11,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [430325466] [2021-10-13 07:43:11,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:11,819 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:43:11,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:43:11,830 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:43:11,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:43:13,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:43:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:43:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:14,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:43:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:30,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [430325466] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:43:30,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927136112] [2021-10-13 07:43:30,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:43:30,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:43:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:43:30,597 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:43:30,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 07:43:31,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:43:31,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:43:31,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:43:31,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:43:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:43:32,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:44:09,470 WARN L207 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 38 [2021-10-13 07:44:31,814 WARN L207 SmtUtils]: Spent 5.67 s on a formula simplification that was a NOOP. DAG size: 42 [2021-10-13 07:44:56,897 WARN L207 SmtUtils]: Spent 5.05 s on a formula simplification that was a NOOP. DAG size: 44 [2021-10-13 07:45:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:45:42,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927136112] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:45:42,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:45:42,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 11] total 25 [2021-10-13 07:45:42,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979545694] [2021-10-13 07:45:42,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 07:45:42,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:45:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 07:45:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=438, Unknown=15, NotChecked=0, Total=600 [2021-10-13 07:45:42,757 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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 07:45:59,411 WARN L207 SmtUtils]: Spent 10.61 s on a formula simplification that was a NOOP. DAG size: 66 [2021-10-13 07:46:11,895 WARN L207 SmtUtils]: Spent 8.48 s on a formula simplification that was a NOOP. DAG size: 64 [2021-10-13 07:46:29,361 WARN L207 SmtUtils]: Spent 14.88 s on a formula simplification that was a NOOP. DAG size: 67 [2021-10-13 07:47:01,899 WARN L207 SmtUtils]: Spent 30.21 s on a formula simplification that was a NOOP. DAG size: 66 [2021-10-13 07:47:48,651 WARN L207 SmtUtils]: Spent 30.99 s on a formula simplification that was a NOOP. DAG size: 65 [2021-10-13 07:49:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:49:13,622 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-10-13 07:49:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 07:49:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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 25 [2021-10-13 07:49:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:49:13,673 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:49:13,673 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 07:49:13,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 292373.3ms TimeCoverageRelationStatistics Valid=649, Invalid=1592, Unknown=15, NotChecked=0, Total=2256 [2021-10-13 07:49:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 07:49:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-10-13 07:49:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 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 07:49:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-10-13 07:49:13,685 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 25 [2021-10-13 07:49:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:49:13,686 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-10-13 07:49:13,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 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 07:49:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-10-13 07:49:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:49:13,688 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:49:13,688 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-10-13 07:49:13,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-13 07:49:13,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:14,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-13 07:49:14,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:49:14,303 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:49:14,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:49:14,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1148586307, now seen corresponding path program 3 times [2021-10-13 07:49:14,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:49:14,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [910826137] [2021-10-13 07:49:14,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:49:14,304 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:49:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:49:14,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:49:14,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:49:18,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-13 07:49:18,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 07:49:18,304 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:49:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:49:21,086 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:49:21,087 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:49:21,088 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:49:21,096 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:49:21,096 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:49:21,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:49:21,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:49:21,302 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:49:21,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:49:21 BoogieIcfgContainer [2021-10-13 07:49:21,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:49:21,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:49:21,357 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:49:21,357 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:49:21,357 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:39:22" (3/4) ... [2021-10-13 07:49:21,359 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:49:21,437 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:49:21,437 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:49:21,438 INFO L168 Benchmark]: Toolchain (without parser) took 600784.84 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 42.9 MB in the beginning and 35.4 MB in the end (delta: 7.5 MB). Peak memory consumption was 26.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:21,439 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 62.9 MB. Free memory is still 43.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:49:21,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.22 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 47.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:21,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.98 ms. Allocated memory is still 62.9 MB. Free memory was 47.0 MB in the beginning and 45.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:21,440 INFO L168 Benchmark]: Boogie Preprocessor took 58.62 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 44.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:49:21,440 INFO L168 Benchmark]: RCFGBuilder took 1395.73 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 34.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:21,441 INFO L168 Benchmark]: TraceAbstraction took 598874.78 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 33.6 MB in the beginning and 40.3 MB in the end (delta: -6.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:21,441 INFO L168 Benchmark]: Witness Printer took 80.84 ms. Allocated memory is still 81.8 MB. Free memory was 40.3 MB in the beginning and 35.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:49:21,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 62.9 MB. Free memory is still 43.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 294.22 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 47.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.98 ms. Allocated memory is still 62.9 MB. Free memory was 47.0 MB in the beginning and 45.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.62 ms. Allocated memory is still 62.9 MB. Free memory was 45.5 MB in the beginning and 44.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1395.73 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 34.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 598874.78 ms. Allocated memory was 62.9 MB in the beginning and 81.8 MB in the end (delta: 18.9 MB). Free memory was 33.6 MB in the beginning and 40.3 MB in the end (delta: -6.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Witness Printer took 80.84 ms. Allocated memory is still 81.8 MB. Free memory was 40.3 MB in the beginning and 35.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 6.3 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: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [counter=0] [L27] EXPR counter++ VAL [counter=1] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=1] [L27] EXPR counter++ VAL [counter=2] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=2] [L27] EXPR counter++ VAL [counter=3] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=3] [L27] EXPR counter++ VAL [counter=4] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=4] [L27] EXPR counter++ VAL [counter=5] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=5] [L27] EXPR counter++ VAL [counter=6] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=6] [L27] EXPR counter++ VAL [counter=7] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=7] [L27] EXPR counter++ VAL [counter=8] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=8] [L27] EXPR counter++ VAL [counter=9] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=9] [L27] EXPR counter++ VAL [counter=10] [L27] COND TRUE counter++<10 [L10] COND FALSE !(!(cond)) VAL [counter=10] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [counter=10] [L27] EXPR counter++ VAL [counter=11] [L27] COND FALSE !(counter++<10) [L10] COND TRUE !(cond) VAL [counter=11] [L12] reach_error() VAL [counter=11] - UnprovableResult [Line: 12]: 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: 12]: 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, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 598759.7ms, OverallIterations: 7, TraceHistogramMax: 11, EmptinessCheckTime: 14.0ms, AutomataDifference: 297687.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 83 SDtfs, 318 SDslu, 448 SDs, 0 SdLazy, 456 SolverSat, 194 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 64215.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 567 GetRequests, 429 SyntacticMatches, 11 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 390741.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 88.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 55 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 159.1ms SsaConstructionTime, 12645.0ms SatisfiabilityAnalysisTime, 279700.7ms InterpolantComputationTime, 311 NumberOfCodeBlocks, 311 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 496 ConstructedInterpolants, 38 QuantifiedInterpolants, 8843 SizeOfPredicates, 67 NumberOfNonLiveVariables, 912 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 24/528 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 07:49:21,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0ec5dd2-3d55-4213-81c0-692cf0474e64/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...