./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE --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 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE --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 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:41:30,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:41:30,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:41:30,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:41:30,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:41:30,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:41:30,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:41:30,292 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:41:30,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:41:30,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:41:30,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:41:30,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:41:30,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:41:30,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:41:30,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:41:30,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:41:30,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:41:30,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:41:30,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:41:30,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:41:30,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:41:30,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:41:30,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:41:30,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:41:30,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:41:30,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:41:30,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:41:30,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:41:30,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:41:30,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:41:30,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:41:30,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:41:30,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:41:30,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:41:30,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:41:30,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:41:30,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:41:30,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:41:30,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:41:30,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:41:30,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:41:30,381 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:41:30,440 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:41:30,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:41:30,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:41:30,442 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:41:30,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:41:30,443 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:41:30,444 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:41:30,444 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:41:30,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:41:30,452 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:41:30,454 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:41:30,454 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:41:30,455 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:41:30,455 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:41:30,455 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:41:30,456 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:41:30,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:41:30,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:41:30,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:41:30,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:41:30,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:41:30,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:41:30,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:41:30,459 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:41:30,459 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:41:30,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:41:30,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:41:30,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:41:30,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:41:30,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:41:30,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:41:30,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:41:30,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:41:30,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:41:30,464 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:41:30,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:41:30,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:41:30,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:41:30,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:41:30,466 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 [2021-10-24 10:41:30,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:41:30,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:41:30,852 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:41:30,853 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:41:30,854 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:41:30,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-10-24 10:41:30,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/20a0d2e24/5a0c3c03aa324aa59e99ffa23a13aaba/FLAG3c6233532 [2021-10-24 10:41:31,662 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:41:31,665 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-10-24 10:41:31,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/20a0d2e24/5a0c3c03aa324aa59e99ffa23a13aaba/FLAG3c6233532 [2021-10-24 10:41:31,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/20a0d2e24/5a0c3c03aa324aa59e99ffa23a13aaba [2021-10-24 10:41:31,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:41:31,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:41:31,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:41:31,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:41:31,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:41:31,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:41:31" (1/1) ... [2021-10-24 10:41:31,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7084851d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:31, skipping insertion in model container [2021-10-24 10:41:31,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:41:31" (1/1) ... [2021-10-24 10:41:31,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:41:32,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:41:32,436 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-10-24 10:41:32,442 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-10-24 10:41:32,443 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-10-24 10:41:32,445 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-10-24 10:41:32,446 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-10-24 10:41:32,448 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-10-24 10:41:32,449 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-10-24 10:41:32,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:41:32,465 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:41:32,511 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-10-24 10:41:32,529 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-10-24 10:41:32,530 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-10-24 10:41:32,531 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-10-24 10:41:32,533 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-10-24 10:41:32,534 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-10-24 10:41:32,536 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-10-24 10:41:32,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:41:32,585 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:41:32,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32 WrapperNode [2021-10-24 10:41:32,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:41:32,588 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:41:32,588 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:41:32,588 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:41:32,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:41:32,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:41:32,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:41:32,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:41:32,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:41:32,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:41:32,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:41:32,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:41:32,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (1/1) ... [2021-10-24 10:41:32,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:41:32,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:41:32,796 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:41:32,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:41:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 10:41:32,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 10:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 10:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 10:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:41:32,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:41:32,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:41:32,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:41:34,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:41:34,034 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-24 10:41:34,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:41:34 BoogieIcfgContainer [2021-10-24 10:41:34,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:41:34,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:41:34,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:41:34,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:41:34,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:41:31" (1/3) ... [2021-10-24 10:41:34,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b822e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:41:34, skipping insertion in model container [2021-10-24 10:41:34,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:41:32" (2/3) ... [2021-10-24 10:41:34,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32b822e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:41:34, skipping insertion in model container [2021-10-24 10:41:34,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:41:34" (3/3) ... [2021-10-24 10:41:34,050 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-10-24 10:41:34,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:41:34,058 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-24 10:41:34,144 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:41:34,159 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, mAutomataTypeConcurrency=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 [2021-10-24 10:41:34,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-24 10:41:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 33 states have (on average 2.0) internal successors, (66), 40 states have internal predecessors, (66), 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) [2021-10-24 10:41:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:41:34,192 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:34,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:41:34,194 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash 203576989, now seen corresponding path program 1 times [2021-10-24 10:41:34,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:34,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013435307] [2021-10-24 10:41:34,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:34,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:34,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:34,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013435307] [2021-10-24 10:41:34,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013435307] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:34,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:41:34,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:41:34,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297727091] [2021-10-24 10:41:34,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 10:41:34,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:34,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 10:41:34,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:41:34,569 INFO L87 Difference]: Start difference. First operand has 41 states, 33 states have (on average 2.0) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:41:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:34,588 INFO L93 Difference]: Finished difference Result 81 states and 131 transitions. [2021-10-24 10:41:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:41:34,590 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 10:41:34,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:34,599 INFO L225 Difference]: With dead ends: 81 [2021-10-24 10:41:34,599 INFO L226 Difference]: Without dead ends: 39 [2021-10-24 10:41:34,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:41:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-24 10:41:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-24 10:41:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.28125) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:41:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-10-24 10:41:34,639 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 5 [2021-10-24 10:41:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:34,640 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-10-24 10:41:34,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:41:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-10-24 10:41:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:41:34,641 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:34,641 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:41:34,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:41:34,642 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:34,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1958512255, now seen corresponding path program 1 times [2021-10-24 10:41:34,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:34,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225376274] [2021-10-24 10:41:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:34,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:34,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:34,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225376274] [2021-10-24 10:41:34,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225376274] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:34,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:41:34,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:41:34,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283565921] [2021-10-24 10:41:34,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:41:34,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:34,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:41:34,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:41:34,887 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-24 10:41:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:35,564 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-24 10:41:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:41:35,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 [2021-10-24 10:41:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:35,566 INFO L225 Difference]: With dead ends: 39 [2021-10-24 10:41:35,566 INFO L226 Difference]: Without dead ends: 37 [2021-10-24 10:41:35,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:41:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-24 10:41:35,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-24 10:41:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 36 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) [2021-10-24 10:41:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-10-24 10:41:35,573 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2021-10-24 10:41:35,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:35,573 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-10-24 10:41:35,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-24 10:41:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-10-24 10:41:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:41:35,575 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:35,575 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:41:35,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:41:35,575 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1953024847, now seen corresponding path program 1 times [2021-10-24 10:41:35,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:35,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106355804] [2021-10-24 10:41:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:35,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:35,628 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:35,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106355804] [2021-10-24 10:41:35,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106355804] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:35,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:41:35,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:41:35,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618318516] [2021-10-24 10:41:35,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:41:35,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:41:35,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:41:35,632 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-24 10:41:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:35,831 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2021-10-24 10:41:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:41:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 [2021-10-24 10:41:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:35,833 INFO L225 Difference]: With dead ends: 43 [2021-10-24 10:41:35,833 INFO L226 Difference]: Without dead ends: 41 [2021-10-24 10:41:35,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:41:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-24 10:41:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-10-24 10:41:35,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:41:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-10-24 10:41:35,840 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 6 [2021-10-24 10:41:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:35,841 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-10-24 10:41:35,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-10-24 10:41:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-10-24 10:41:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 10:41:35,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:35,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:41:35,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:41:35,843 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1088186010, now seen corresponding path program 1 times [2021-10-24 10:41:35,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:35,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479479974] [2021-10-24 10:41:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:35,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:35,969 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:35,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479479974] [2021-10-24 10:41:35,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479479974] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:35,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:41:35,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:41:35,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946030030] [2021-10-24 10:41:35,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:41:35,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:35,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:41:35,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:41:35,973 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-24 10:41:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:36,449 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-10-24 10:41:36,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:41:36,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 10:41:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:36,454 INFO L225 Difference]: With dead ends: 35 [2021-10-24 10:41:36,454 INFO L226 Difference]: Without dead ends: 33 [2021-10-24 10:41:36,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:41:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-24 10:41:36,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-24 10:41:36,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:41:36,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-24 10:41:36,461 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 9 [2021-10-24 10:41:36,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:36,461 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-24 10:41:36,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-24 10:41:36,462 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-24 10:41:36,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 10:41:36,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:36,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:41:36,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:41:36,463 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:36,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1354743889, now seen corresponding path program 1 times [2021-10-24 10:41:36,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:36,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523725778] [2021-10-24 10:41:36,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:36,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:36,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:36,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523725778] [2021-10-24 10:41:36,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523725778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:36,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:41:36,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:41:36,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996163576] [2021-10-24 10:41:36,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:41:36,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:36,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:41:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:41:36,568 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-24 10:41:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:37,291 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-24 10:41:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:41:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 10:41:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:37,294 INFO L225 Difference]: With dead ends: 58 [2021-10-24 10:41:37,294 INFO L226 Difference]: Without dead ends: 56 [2021-10-24 10:41:37,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:41:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-24 10:41:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 40. [2021-10-24 10:41:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 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) [2021-10-24 10:41:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-24 10:41:37,302 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 9 [2021-10-24 10:41:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:37,302 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-24 10:41:37,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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) [2021-10-24 10:41:37,303 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-24 10:41:37,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:41:37,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:37,304 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:41:37,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 10:41:37,305 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:37,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:37,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2069574902, now seen corresponding path program 1 times [2021-10-24 10:41:37,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:37,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764471851] [2021-10-24 10:41:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:37,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:37,391 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:37,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764471851] [2021-10-24 10:41:37,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764471851] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:37,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:41:37,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:41:37,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343170562] [2021-10-24 10:41:37,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:41:37,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:41:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:41:37,394 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-24 10:41:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:37,506 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-24 10:41:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:41:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 [2021-10-24 10:41:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:37,509 INFO L225 Difference]: With dead ends: 40 [2021-10-24 10:41:37,509 INFO L226 Difference]: Without dead ends: 38 [2021-10-24 10:41:37,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:41:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-24 10:41:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-24 10:41:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:41:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-24 10:41:37,515 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 11 [2021-10-24 10:41:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:37,515 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-24 10:41:37,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-24 10:41:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-24 10:41:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:41:37,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:37,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:41:37,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 10:41:37,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1743206058, now seen corresponding path program 1 times [2021-10-24 10:41:37,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:37,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786421582] [2021-10-24 10:41:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:37,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:37,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:37,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786421582] [2021-10-24 10:41:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786421582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:37,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:41:37,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-24 10:41:37,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051241528] [2021-10-24 10:41:37,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:41:37,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:41:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:41:37,670 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-10-24 10:41:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:38,359 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-10-24 10:41:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:41:38,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 [2021-10-24 10:41:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:38,362 INFO L225 Difference]: With dead ends: 53 [2021-10-24 10:41:38,362 INFO L226 Difference]: Without dead ends: 41 [2021-10-24 10:41:38,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:41:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-24 10:41:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-24 10:41:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 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) [2021-10-24 10:41:38,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-24 10:41:38,377 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 13 [2021-10-24 10:41:38,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:38,378 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-24 10:41:38,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2021-10-24 10:41:38,379 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-24 10:41:38,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:41:38,380 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:38,380 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:41:38,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 10:41:38,381 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:38,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -282967061, now seen corresponding path program 1 times [2021-10-24 10:41:38,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:38,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133574212] [2021-10-24 10:41:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:38,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:38,482 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:38,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133574212] [2021-10-24 10:41:38,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133574212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:41:38,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630568450] [2021-10-24 10:41:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:38,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:41:38,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:41:38,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:41:38,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:41:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:38,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:41:38,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:41:38,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:38,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:38,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:41:38,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:38,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:38,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:41:39,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-24 10:41:39,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-24 10:41:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:39,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:41:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:39,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630568450] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:41:39,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230577359] [2021-10-24 10:41:39,449 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-10-24 10:41:39,449 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:41:39,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:41:39,465 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:41:39,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:41:39,539 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,550 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,551 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,554 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,555 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,556 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:41:39,557 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 10:41:39,559 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,559 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,564 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,566 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:41:39,568 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-24 10:41:39,569 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,570 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,571 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,573 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-24 10:41:39,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-24 10:41:39,575 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,577 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:41:39,582 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-24 10:41:39,583 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,584 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,586 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,586 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,587 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:41:39,588 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:41:39,590 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,593 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,594 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-24 10:41:39,598 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,600 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,601 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,601 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-24 10:41:39,602 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-24 10:41:39,603 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,604 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,604 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:41:39,606 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,607 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,608 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,609 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,615 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-24 10:41:39,617 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-24 10:41:39,618 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,619 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,620 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:41:39,628 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,629 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,630 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-24 10:41:39,631 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:39,631 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,632 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-24 10:41:39,639 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 373 [2021-10-24 10:41:39,689 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_23|], 36=[|v_#valid_33|]} [2021-10-24 10:41:39,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 13 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2021-10-24 10:41:39,809 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,810 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:41:39,811 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,812 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-24 10:41:39,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:41:39,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:39,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,375 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-24 10:41:40,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 42 [2021-10-24 10:41:40,378 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,383 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-24 10:41:40,384 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,385 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-24 10:41:40,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:41:40,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,406 INFO L446 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_46|, |v_#memory_$Pointer$.base_46|], 2=[|v_#memory_int_40|, |v_#memory_int_37|, |v_#memory_int_38|], 4=[|v_#memory_int_39|], 6=[|v_#memory_$Pointer$.base_29|, |v_#memory_$Pointer$.offset_29|, |v_#memory_int_71|]} [2021-10-24 10:41:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:41:40,547 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,548 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 10:41:40,549 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,550 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 10:41:40,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-24 10:41:40,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:41:40,680 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,681 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 10:41:40,682 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,682 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 10:41:40,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-24 10:41:40,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,728 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-24 10:41:40,734 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,734 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,735 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,736 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-24 10:41:40,737 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-24 10:41:40,738 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,738 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,739 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,741 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-10-24 10:41:40,742 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-24 10:41:40,742 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-24 10:41:40,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,770 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,774 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 10:41:40,775 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,776 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,776 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,777 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 10:41:40,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-10-24 10:41:40,779 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,779 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,780 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,780 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-10-24 10:41:40,782 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-10-24 10:41:40,783 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-24 10:41:40,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,814 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,815 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-24 10:41:40,816 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,817 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,817 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,818 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-24 10:41:40,819 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-10-24 10:41:40,820 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,820 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,822 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-10-24 10:41:40,823 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-10-24 10:41:40,823 INFO L550 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-24 10:41:40,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,841 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,842 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-24 10:41:40,843 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,844 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,844 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,845 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-24 10:41:40,846 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-24 10:41:40,847 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,847 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:41:40,848 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,849 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-24 10:41:40,850 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-10-24 10:41:40,850 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-10-24 10:41:40,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2021-10-24 10:41:40,919 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:41:40,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,923 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:41:40,924 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-10-24 10:41:40,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:40,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 39 [2021-10-24 10:41:40,969 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:41:40,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:40,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:41:40,974 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-10-24 10:41:40,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:40,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:41:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 73 [2021-10-24 10:41:41,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,022 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-10-24 10:41:41,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,024 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 67 [2021-10-24 10:41:41,025 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-10-24 10:41:41,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,045 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-10-24 10:41:41,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 9 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:41:41,054 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 11 variables, input treesize:364, output treesize:203 [2021-10-24 10:41:41,070 INFO L180 QuantifierPusher]: treesize reduction 8, result has 96.3 percent of original size [2021-10-24 10:41:41,075 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-10-24 10:41:41,084 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,092 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 203 [2021-10-24 10:41:41,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-10-24 10:41:41,137 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,144 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 231 [2021-10-24 10:41:41,153 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,166 INFO L185 QuantifierPusher]: treesize reduction 9, result has 96.1 percent of original size 221 [2021-10-24 10:41:41,180 INFO L180 QuantifierPusher]: treesize reduction 9, result has 96.4 percent of original size [2021-10-24 10:41:41,188 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 240 [2021-10-24 10:41:41,202 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,214 INFO L185 QuantifierPusher]: treesize reduction 9, result has 96.1 percent of original size 221 [2021-10-24 10:41:41,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,255 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:41:41,295 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:41:41,306 INFO L185 QuantifierPusher]: treesize reduction 9, result has 96.1 percent of original size 220 [2021-10-24 10:41:41,310 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:41:42,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1230577359] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:41:42,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:41:42,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4, 4] total 11 [2021-10-24 10:41:42,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335337987] [2021-10-24 10:41:42,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:41:42,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:41:42,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:41:42,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:41:42,949 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-10-24 10:41:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:41:43,745 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-10-24 10:41:43,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:41:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-24 10:41:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:41:43,747 INFO L225 Difference]: With dead ends: 45 [2021-10-24 10:41:43,747 INFO L226 Difference]: Without dead ends: 20 [2021-10-24 10:41:43,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1703.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:41:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-24 10:41:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-24 10:41:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:41:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-24 10:41:43,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2021-10-24 10:41:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:41:43,752 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-24 10:41:43,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-10-24 10:41:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-24 10:41:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 10:41:43,753 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:41:43,753 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:41:43,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:41:43,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-24 10:41:43,954 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:41:43,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:41:43,954 INFO L82 PathProgramCache]: Analyzing trace with hash -78338206, now seen corresponding path program 1 times [2021-10-24 10:41:43,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:41:43,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623030283] [2021-10-24 10:41:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:43,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:41:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:41:44,345 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:41:44,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623030283] [2021-10-24 10:41:44,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623030283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:41:44,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150513092] [2021-10-24 10:41:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:41:44,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:41:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:41:44,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:41:44,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:41:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:41:44,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-24 10:41:44,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:41:44,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:41:44,580 INFO L354 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2021-10-24 10:41:44,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 39 [2021-10-24 10:42:37,709 WARN L207 SmtUtils]: Spent 52.44 s on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2021-10-24 10:42:37,710 INFO L354 Elim1Store]: treesize reduction 1891, result has 6.2 percent of original size [2021-10-24 10:42:37,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 4239 treesize of output 4128 [2021-10-24 10:45:13,248 WARN L207 SmtUtils]: Spent 2.59 m on a formula simplification. DAG size of input: 160 DAG size of output: 67 [2021-10-24 10:45:13,249 INFO L354 Elim1Store]: treesize reduction 1198, result has 13.5 percent of original size [2021-10-24 10:45:13,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 3346 treesize of output 3176 [2021-10-24 10:47:06,159 WARN L207 SmtUtils]: Spent 1.88 m on a formula simplification. DAG size of input: 172 DAG size of output: 63 [2021-10-24 10:47:06,160 INFO L354 Elim1Store]: treesize reduction 501, result has 19.3 percent of original size [2021-10-24 10:47:06,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 34 case distinctions, treesize of input 3270 treesize of output 3368 [2021-10-24 10:47:07,787 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-24 10:47:07,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3367 treesize of output 3373 [2021-10-24 10:47:07,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-24 10:47:07,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234499642] [2021-10-24 10:47:07,974 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-10-24 10:47:07,975 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:47:07,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:47:07,975 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:47:07,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:47:08,002 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,004 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,006 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,007 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:47:08,008 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-10-24 10:47:08,008 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,010 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,011 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:47:08,013 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-24 10:47:08,014 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,016 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,017 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,017 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-24 10:47:08,018 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-10-24 10:47:08,019 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,021 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,021 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:47:08,029 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 56 [2021-10-24 10:47:08,030 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,031 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,031 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,032 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:47:08,033 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-24 10:47:08,034 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,034 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,035 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-24 10:47:08,037 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,038 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-24 10:47:08,039 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,040 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-24 10:47:08,041 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-24 10:47:08,042 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,042 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:47:08,045 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,045 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,046 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-24 10:47:08,047 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,047 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,047 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,048 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,048 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-10-24 10:47:08,049 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-24 10:47:08,049 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:47:08,050 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:08,050 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-10-24 10:47:08,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 373 [2021-10-24 10:47:08,059 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3cab3c19 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-10-24 10:47:08,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:47:08,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-10-24 10:47:08,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834311561] [2021-10-24 10:47:08,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:47:08,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:47:08,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:47:08,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:47:08,069 INFO L87 Difference]: Start difference. First operand 20 states and 20 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) [2021-10-24 10:47:08,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:47:08,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:08,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-24 10:47:08,284 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3cab3c19 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) 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:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) 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) [2021-10-24 10:47:08,286 INFO L168 Benchmark]: Toolchain (without parser) took 336358.95 ms. Allocated memory was 100.7 MB in the beginning and 153.1 MB in the end (delta: 52.4 MB). Free memory was 65.1 MB in the beginning and 99.9 MB in the end (delta: -34.8 MB). Peak memory consumption was 17.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:08,286 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 100.7 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:47:08,287 INFO L168 Benchmark]: CACSL2BoogieTranslator took 654.71 ms. Allocated memory is still 100.7 MB. Free memory was 64.9 MB in the beginning and 65.2 MB in the end (delta: -313.6 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:08,287 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.10 ms. Allocated memory is still 100.7 MB. Free memory was 65.2 MB in the beginning and 62.9 MB in the end (delta: 2.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:47:08,288 INFO L168 Benchmark]: Boogie Preprocessor took 76.83 ms. Allocated memory is still 100.7 MB. Free memory was 62.9 MB in the beginning and 61.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:08,289 INFO L168 Benchmark]: RCFGBuilder took 1296.51 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 61.2 MB in the beginning and 86.8 MB in the end (delta: -25.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:08,289 INFO L168 Benchmark]: TraceAbstraction took 334246.30 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 86.2 MB in the beginning and 99.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:08,291 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 100.7 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 654.71 ms. Allocated memory is still 100.7 MB. Free memory was 64.9 MB in the beginning and 65.2 MB in the end (delta: -313.6 kB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.10 ms. Allocated memory is still 100.7 MB. Free memory was 65.2 MB in the beginning and 62.9 MB in the end (delta: 2.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 76.83 ms. Allocated memory is still 100.7 MB. Free memory was 62.9 MB in the beginning and 61.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1296.51 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 61.2 MB in the beginning and 86.8 MB in the end (delta: -25.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 334246.30 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 86.2 MB in the beginning and 99.9 MB in the end (delta: -13.7 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3cab3c19 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3cab3c19: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-24 10:47:08,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:47:10,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:47:10,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:47:10,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:47:10,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:47:10,804 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:47:10,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:47:10,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:47:10,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:47:10,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:47:10,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:47:10,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:47:10,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:47:10,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:47:10,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:47:10,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:47:10,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:47:10,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:47:10,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:47:10,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:47:10,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:47:10,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:47:10,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:47:10,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:47:10,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:47:10,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:47:10,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:47:10,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:47:10,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:47:10,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:47:10,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:47:10,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:47:10,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:47:10,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:47:10,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:47:10,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:47:10,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:47:10,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:47:10,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:47:10,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:47:10,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:47:10,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 10:47:10,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:47:10,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:47:10,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:47:10,924 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:47:10,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:47:10,924 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:47:10,925 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:47:10,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:47:10,925 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:47:10,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:47:10,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:47:10,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:47:10,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:47:10,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:47:10,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:47:10,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:47:10,928 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:47:10,928 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:47:10,928 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:47:10,928 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:47:10,928 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:47:10,929 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:47:10,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:47:10,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:47:10,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:47:10,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:47:10,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:47:10,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:47:10,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:47:10,930 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:47:10,930 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:47:10,931 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:47:10,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:47:10,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:47:10,931 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:47:10,931 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 503e46fe74670dc8b1fd2e8b2c5a408fc01c83cb421ff9aefb8796417315d291 [2021-10-24 10:47:11,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:47:11,298 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:47:11,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:47:11,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:47:11,303 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:47:11,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-10-24 10:47:11,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/60e69772a/628026d21a78438986c42f1f6ead867c/FLAGa131f09bc [2021-10-24 10:47:12,102 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:47:12,102 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i [2021-10-24 10:47:12,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/60e69772a/628026d21a78438986c42f1f6ead867c/FLAGa131f09bc [2021-10-24 10:47:12,296 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/data/60e69772a/628026d21a78438986c42f1f6ead867c [2021-10-24 10:47:12,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:47:12,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:47:12,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:47:12,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:47:12,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:47:12,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c027fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12, skipping insertion in model container [2021-10-24 10:47:12,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:47:12,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:47:12,698 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-10-24 10:47:12,715 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-10-24 10:47:12,718 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-10-24 10:47:12,719 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-10-24 10:47:12,720 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-10-24 10:47:12,721 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-10-24 10:47:12,722 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-10-24 10:47:12,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:47:12,747 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:47:12,806 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22665,22678] [2021-10-24 10:47:12,812 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22735,22748] [2021-10-24 10:47:12,812 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22799,22812] [2021-10-24 10:47:12,813 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22894,22907] [2021-10-24 10:47:12,814 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[22966,22979] [2021-10-24 10:47:12,814 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23105,23118] [2021-10-24 10:47:12,815 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_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/sv-benchmarks/c/forester-heap/dll-rb-sentinel-1.i[23179,23192] [2021-10-24 10:47:12,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:47:12,855 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:47:12,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12 WrapperNode [2021-10-24 10:47:12,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:47:12,857 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:47:12,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:47:12,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:47:12,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:47:12,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:47:12,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:47:12,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:47:12,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:12,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:13,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:13,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:13,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:47:13,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:47:13,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:47:13,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:47:13,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (1/1) ... [2021-10-24 10:47:13,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:47:13,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:47:13,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:47:13,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:47:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 10:47:13,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 10:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 10:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 10:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 10:47:13,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:47:13,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:47:14,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:47:14,387 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-10-24 10:47:14,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:47:14 BoogieIcfgContainer [2021-10-24 10:47:14,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:47:14,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:47:14,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:47:14,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:47:14,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:47:12" (1/3) ... [2021-10-24 10:47:14,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4eefda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:47:14, skipping insertion in model container [2021-10-24 10:47:14,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:47:12" (2/3) ... [2021-10-24 10:47:14,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4eefda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:47:14, skipping insertion in model container [2021-10-24 10:47:14,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:47:14" (3/3) ... [2021-10-24 10:47:14,397 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-sentinel-1.i [2021-10-24 10:47:14,402 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:47:14,402 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-10-24 10:47:14,462 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:47:14,468 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, mAutomataTypeConcurrency=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 [2021-10-24 10:47:14,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-24 10:47:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:47:14,485 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:14,486 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:47:14,486 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:14,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash 891569350, now seen corresponding path program 1 times [2021-10-24 10:47:14,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:14,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341291021] [2021-10-24 10:47:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:14,505 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:14,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:14,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:47:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:14,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-24 10:47:14,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:14,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:14,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:14,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341291021] [2021-10-24 10:47:14,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341291021] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:47:14,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:14,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 10:47:14,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640133650] [2021-10-24 10:47:14,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 10:47:14,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 10:47:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:47:14,717 INFO L87 Difference]: Start difference. First operand has 46 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-24 10:47:14,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:14,735 INFO L93 Difference]: Finished difference Result 90 states and 148 transitions. [2021-10-24 10:47:14,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:47:14,736 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 [2021-10-24 10:47:14,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:14,744 INFO L225 Difference]: With dead ends: 90 [2021-10-24 10:47:14,744 INFO L226 Difference]: Without dead ends: 40 [2021-10-24 10:47:14,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:47:14,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-24 10:47:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-24 10:47:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.303030303030303) internal successors, (43), 39 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) [2021-10-24 10:47:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-24 10:47:14,777 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 6 [2021-10-24 10:47:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:14,778 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-24 10:47:14,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-24 10:47:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-24 10:47:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:47:14,779 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:14,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:47:14,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:14,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:47:14,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash 889692517, now seen corresponding path program 1 times [2021-10-24 10:47:14,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:14,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690869035] [2021-10-24 10:47:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:14,999 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:14,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:15,006 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:15,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:47:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:47:15,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:15,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-10-24 10:47:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:15,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:15,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:15,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690869035] [2021-10-24 10:47:15,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690869035] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:47:15,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:15,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:47:15,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35544486] [2021-10-24 10:47:15,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:47:15,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:47:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:47:15,308 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-24 10:47:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:16,123 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-10-24 10:47:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:47:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 [2021-10-24 10:47:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:16,126 INFO L225 Difference]: With dead ends: 45 [2021-10-24 10:47:16,126 INFO L226 Difference]: Without dead ends: 43 [2021-10-24 10:47:16,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:47:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-24 10:47:16,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-10-24 10:47:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-24 10:47:16,133 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 6 [2021-10-24 10:47:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:16,133 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-24 10:47:16,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-10-24 10:47:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-24 10:47:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 10:47:16,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:16,134 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:16,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:16,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:47:16,335 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1810723981, now seen corresponding path program 1 times [2021-10-24 10:47:16,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:16,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843790639] [2021-10-24 10:47:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:16,338 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:16,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:16,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 10:47:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:16,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:47:16,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:16,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:47:16,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-10-24 10:47:16,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:16,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:16,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:16,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843790639] [2021-10-24 10:47:16,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843790639] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:47:16,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:16,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:47:16,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340381960] [2021-10-24 10:47:16,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:47:16,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:47:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:47:16,527 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:16,849 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-10-24 10:47:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:47:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-24 10:47:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:16,851 INFO L225 Difference]: With dead ends: 38 [2021-10-24 10:47:16,851 INFO L226 Difference]: Without dead ends: 36 [2021-10-24 10:47:16,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:47:16,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-24 10:47:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-24 10:47:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 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) [2021-10-24 10:47:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-24 10:47:16,857 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 7 [2021-10-24 10:47:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:16,857 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-24 10:47:16,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-24 10:47:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 10:47:16,858 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:16,859 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:16,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:17,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:47:17,069 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:17,070 INFO L82 PathProgramCache]: Analyzing trace with hash 590587384, now seen corresponding path program 1 times [2021-10-24 10:47:17,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:17,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471692417] [2021-10-24 10:47:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:17,071 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:17,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:17,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 10:47:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 10:47:17,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:17,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:47:17,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-24 10:47:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:17,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:17,402 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:17,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471692417] [2021-10-24 10:47:17,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471692417] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:47:17,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:17,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-24 10:47:17,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002174182] [2021-10-24 10:47:17,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:47:17,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:47:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:47:17,405 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-24 10:47:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:19,386 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-10-24 10:47:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:47:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 10:47:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:19,388 INFO L225 Difference]: With dead ends: 75 [2021-10-24 10:47:19,388 INFO L226 Difference]: Without dead ends: 73 [2021-10-24 10:47:19,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:47:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-24 10:47:19,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2021-10-24 10:47:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 51 states have internal predecessors, (60), 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) [2021-10-24 10:47:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-10-24 10:47:19,397 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 9 [2021-10-24 10:47:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:19,398 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-10-24 10:47:19,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-24 10:47:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-10-24 10:47:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 10:47:19,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:19,399 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:19,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:19,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:47:19,612 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1507179337, now seen corresponding path program 1 times [2021-10-24 10:47:19,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:19,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470113743] [2021-10-24 10:47:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:19,615 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:19,622 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:19,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 10:47:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:19,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 10:47:19,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:21,242 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-10-24 10:47:21,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 126 [2021-10-24 10:47:22,009 INFO L354 Elim1Store]: treesize reduction 163, result has 25.6 percent of original size [2021-10-24 10:47:22,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 111 [2021-10-24 10:47:25,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:25,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 142 [2021-10-24 10:47:25,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:25,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 141 [2021-10-24 10:47:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:26,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:27,098 INFO L354 Elim1Store]: treesize reduction 235, result has 0.4 percent of original size [2021-10-24 10:47:27,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 1 [2021-10-24 10:47:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:27,108 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:27,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470113743] [2021-10-24 10:47:27,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470113743] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:47:27,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:27,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-10-24 10:47:27,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271870793] [2021-10-24 10:47:27,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:47:27,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:27,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:47:27,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:47:27,112 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:34,039 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-10-24 10:47:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:47:34,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-24 10:47:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:34,042 INFO L225 Difference]: With dead ends: 64 [2021-10-24 10:47:34,042 INFO L226 Difference]: Without dead ends: 62 [2021-10-24 10:47:34,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:47:34,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-24 10:47:34,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-10-24 10:47:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-10-24 10:47:34,052 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 10 [2021-10-24 10:47:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:34,052 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-10-24 10:47:34,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-10-24 10:47:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:47:34,054 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:34,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:34,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:34,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:47:34,268 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash -995236357, now seen corresponding path program 1 times [2021-10-24 10:47:34,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:34,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314534073] [2021-10-24 10:47:34,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:34,270 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:34,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:34,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 10:47:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:34,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:47:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:34,594 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 10:47:34,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-10-24 10:47:34,745 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-24 10:47:34,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 78 [2021-10-24 10:47:34,987 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-10-24 10:47:34,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 92 [2021-10-24 10:47:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:35,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:39,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:39,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314534073] [2021-10-24 10:47:39,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314534073] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:47:39,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:39,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-10-24 10:47:39,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919280643] [2021-10-24 10:47:39,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:47:39,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:47:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-10-24 10:47:39,227 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-24 10:47:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:41,463 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-10-24 10:47:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:47:41,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:47:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:41,465 INFO L225 Difference]: With dead ends: 51 [2021-10-24 10:47:41,465 INFO L226 Difference]: Without dead ends: 49 [2021-10-24 10:47:41,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4088.8ms TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-10-24 10:47:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-24 10:47:41,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-10-24 10:47:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2) 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) [2021-10-24 10:47:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-10-24 10:47:41,475 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 12 [2021-10-24 10:47:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:41,476 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-10-24 10:47:41,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-24 10:47:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-10-24 10:47:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:47:41,477 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:41,478 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:41,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:41,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:47:41,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2079156959, now seen corresponding path program 1 times [2021-10-24 10:47:41,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:41,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882569777] [2021-10-24 10:47:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:41,699 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:41,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:41,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:41,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 10:47:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:41,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 10:47:41,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:41,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:47:41,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-24 10:47:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:42,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:42,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:42,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882569777] [2021-10-24 10:47:42,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882569777] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:47:42,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:42,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-24 10:47:42,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030157261] [2021-10-24 10:47:42,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:47:42,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:47:42,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:47:42,137 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-24 10:47:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:44,828 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-10-24 10:47:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:47:44,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 [2021-10-24 10:47:44,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:44,830 INFO L225 Difference]: With dead ends: 77 [2021-10-24 10:47:44,830 INFO L226 Difference]: Without dead ends: 65 [2021-10-24 10:47:44,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:47:44,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-24 10:47:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-10-24 10:47:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-10-24 10:47:44,839 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 13 [2021-10-24 10:47:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:44,840 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-10-24 10:47:44,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-10-24 10:47:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-10-24 10:47:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:47:44,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:44,842 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:44,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:45,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:47:45,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:45,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:45,053 INFO L82 PathProgramCache]: Analyzing trace with hash -734247455, now seen corresponding path program 1 times [2021-10-24 10:47:45,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:45,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25286337] [2021-10-24 10:47:45,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:45,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:45,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:45,055 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:45,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 10:47:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:47:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:45,327 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-10-24 10:47:45,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:47:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:45,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:45,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:47:45,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-24 10:47:45,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-10-24 10:47:45,850 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-24 10:47:45,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-10-24 10:47:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:45,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:46,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:46,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25286337] [2021-10-24 10:47:46,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25286337] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:46,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [75395709] [2021-10-24 10:47:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:46,220 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:47:46,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:47:46,222 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:47:46,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-24 10:47:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:47:46,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:46,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:46,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:47:46,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:46,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:46,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:46,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:47:47,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:47,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-10-24 10:47:47,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:47,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-10-24 10:47:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:47,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:47,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [75395709] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:47,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596198907] [2021-10-24 10:47:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:47,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:47:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:47:47,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:47:47,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-24 10:47:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 10:47:47,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:47,783 INFO L354 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2021-10-24 10:47:47,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:47:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:47,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 17 [2021-10-24 10:47:48,249 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-24 10:47:48,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-10-24 10:47:48,261 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-24 10:47:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-10-24 10:47:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:48,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:47:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:47:48,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596198907] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:47:48,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:47:48,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-10-24 10:47:48,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239508945] [2021-10-24 10:47:48,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-24 10:47:48,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:47:48,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-24 10:47:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-10-24 10:47:48,482 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:47:51,281 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-24 10:47:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:47:51,282 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-24 10:47:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:47:51,283 INFO L225 Difference]: With dead ends: 73 [2021-10-24 10:47:51,283 INFO L226 Difference]: Without dead ends: 51 [2021-10-24 10:47:51,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:47:51,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-24 10:47:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-24 10:47:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-10-24 10:47:51,292 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 16 [2021-10-24 10:47:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:47:51,292 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-10-24 10:47:51,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:47:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-10-24 10:47:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-24 10:47:51,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:47:51,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:47:51,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:51,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:51,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:51,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:47:51,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2021-10-24 10:47:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:47:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash -587248931, now seen corresponding path program 1 times [2021-10-24 10:47:51,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:47:51,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482288531] [2021-10-24 10:47:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:51,922 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:47:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:47:51,923 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:47:51,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 10:47:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:52,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-24 10:47:52,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:47:52,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:47:52,345 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 10:47:52,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-10-24 10:47:52,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:52,461 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:52,463 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 63 [2021-10-24 10:47:52,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:47:52,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2021-10-24 10:47:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:47:52,565 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-10-24 10:47:52,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 51 [2021-10-24 10:47:52,607 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-24 10:47:52,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2021-10-24 10:47:52,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:47:52,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482288531] [2021-10-24 10:47:52,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-10-24 10:47:52,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2085166021] [2021-10-24 10:47:52,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:52,765 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:47:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:47:52,768 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:47:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-24 10:47:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:53,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-24 10:47:53,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@ef348c1 [2021-10-24 10:47:53,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348221857] [2021-10-24 10:47:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:47:53,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:47:53,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:47:53,188 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:47:53,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-24 10:47:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:47:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-24 10:47:53,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@ef348c1 [2021-10-24 10:47:53,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:47:53,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-24 10:47:53,453 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-24 10:47:53,453 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-24 10:47:53,462 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:47:53,464 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:47:53,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:47:53,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:47:53,465 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:47:53,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:47:53,466 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:47:53,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:53,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-24 10:47:53,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-24 10:47:54,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:47:54,073 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:47:54,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:47:54 BoogieIcfgContainer [2021-10-24 10:47:54,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:47:54,091 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:47:54,092 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:47:54,092 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:47:54,093 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:47:14" (3/4) ... [2021-10-24 10:47:54,096 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:47:54,096 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:47:54,098 INFO L168 Benchmark]: Toolchain (without parser) took 41792.83 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 58.2 MB in the beginning and 42.9 MB in the end (delta: 15.3 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:54,098 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 77.6 MB. Free memory was 57.3 MB in the beginning and 57.2 MB in the end (delta: 58.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:47:54,099 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.47 ms. Allocated memory is still 77.6 MB. Free memory was 58.0 MB in the beginning and 51.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:54,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.24 ms. Allocated memory is still 77.6 MB. Free memory was 51.0 MB in the beginning and 48.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:54,100 INFO L168 Benchmark]: Boogie Preprocessor took 83.73 ms. Allocated memory is still 77.6 MB. Free memory was 48.9 MB in the beginning and 46.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:54,100 INFO L168 Benchmark]: RCFGBuilder took 1373.36 ms. Allocated memory is still 77.6 MB. Free memory was 46.6 MB in the beginning and 56.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:54,101 INFO L168 Benchmark]: TraceAbstraction took 39699.74 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 55.7 MB in the beginning and 43.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:47:54,101 INFO L168 Benchmark]: Witness Printer took 5.16 ms. Allocated memory is still 94.4 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:47:54,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 77.6 MB. Free memory was 57.3 MB in the beginning and 57.2 MB in the end (delta: 58.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 549.47 ms. Allocated memory is still 77.6 MB. Free memory was 58.0 MB in the beginning and 51.2 MB in the end (delta: 6.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.24 ms. Allocated memory is still 77.6 MB. Free memory was 51.0 MB in the beginning and 48.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.73 ms. Allocated memory is still 77.6 MB. Free memory was 48.9 MB in the beginning and 46.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1373.36 ms. Allocated memory is still 77.6 MB. Free memory was 46.6 MB in the beginning and 56.3 MB in the end (delta: -9.7 MB). Peak memory consumption was 23.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39699.74 ms. Allocated memory was 77.6 MB in the beginning and 94.4 MB in the end (delta: 16.8 MB). Free memory was 55.7 MB in the beginning and 43.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 28.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.16 ms. Allocated memory is still 94.4 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1042]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L998] struct TSLL* null = malloc(sizeof(struct TSLL)); [L999] null->next = ((void*)0) [L1000] null->prev = ((void*)0) [L1001] null->colour = BLACK [L1003] struct TSLL* list = malloc(sizeof(struct TSLL)); [L1004] list->next = null [L1005] list->prev = null [L1006] list->colour = BLACK [L1008] struct TSLL* end = list; [L1011] COND TRUE __VERIFIER_nondet_int() [L1014] end->next = malloc(sizeof(struct TSLL)) [L1015] EXPR end->next [L1015] end->next->prev = end [L1016] EXPR end->next [L1016] end = end->next [L1017] end->next = null [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1025] end->colour = RED [L1026] end->next = malloc(sizeof(struct TSLL)) [L1027] EXPR end->next [L1027] end->next->prev = end [L1028] EXPR end->next [L1028] end = end->next [L1029] end->next = null [L1030] end->colour = BLACK [L1032] EXPR end->colour [L1032] COND FALSE !(!(BLACK == end->colour)) [L1033] EXPR end->next [L1033] COND FALSE !(!(null == end->next)) [L1034] COND FALSE !(!(null != end)) [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1037] end = null [L1038] end = list [L1041] COND FALSE !(!(null != end)) [L1042] EXPR end->colour [L1042] COND TRUE !(BLACK == end->colour) [L1042] reach_error() - UnprovableResult [Line: 1032]: 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: 1033]: 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: 1034]: 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: 1041]: 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: 1048]: 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: 1049]: 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, 46 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 39610.9ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 15.2ms, AutomataDifference: 17844.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 246 SDtfs, 279 SDslu, 482 SDs, 0 SdLazy, 423 SolverSat, 62 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 16606.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 5383.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=4, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 70.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 53 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 156.4ms SsaConstructionTime, 690.6ms SatisfiabilityAnalysisTime, 15482.0ms InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 202 ConstructedInterpolants, 6 QuantifiedInterpolants, 2694 SizeOfPredicates, 38 NumberOfNonLiveVariables, 597 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 14 PerfectInterpolantSequences, 6/12 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 could not prove your program: unable to determine feasibility of some traces [2021-10-24 10:47:54,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a6612b9-f61e-4a53-b1ef-01deb3e2763f/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...