./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs --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 ac848265e1daab3ca0f2905a3d0d6fdafaee38399ca7123ad8517babc999ef80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:32:43,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:32:43,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:32:43,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:32:43,589 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:32:43,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:32:43,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:32:43,596 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:32:43,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:32:43,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:32:43,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:32:43,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:32:43,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:32:43,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:32:43,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:32:43,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:32:43,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:32:43,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:32:43,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:32:43,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:32:43,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:32:43,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:32:43,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:32:43,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:32:43,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:32:43,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:32:43,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:32:43,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:32:43,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:32:43,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:32:43,648 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:32:43,649 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:32:43,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:32:43,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:32:43,657 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:32:43,659 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:32:43,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:32:43,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:32:43,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:32:43,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:32:43,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:32:43,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:32:43,729 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:32:43,729 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:32:43,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:32:43,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:32:43,732 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:32:43,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:32:43,733 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:32:43,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:32:43,741 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:32:43,742 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:32:43,743 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:32:43,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:32:43,744 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:32:43,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:32:43,745 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:32:43,745 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:32:43,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:32:43,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:32:43,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:32:43,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:32:43,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:32:43,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:32:43,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:32:43,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:32:43,748 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:32:43,749 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:32:43,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:32:43,750 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:32:43,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:32:43,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:32:43,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:32:43,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:32:43,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:32:43,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:32:43,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:32:43,752 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:32:43,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:32:43,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:32:43,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:32:43,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:32:43,754 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac848265e1daab3ca0f2905a3d0d6fdafaee38399ca7123ad8517babc999ef80 [2021-11-19 13:32:44,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:32:44,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:32:44,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:32:44,117 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:32:44,118 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:32:44,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i [2021-11-19 13:32:44,241 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/88755951c/48df83753e7f4dc2b4c908b551947ca6/FLAGc7cd25e24 [2021-11-19 13:32:45,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:32:45,060 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i [2021-11-19 13:32:45,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/88755951c/48df83753e7f4dc2b4c908b551947ca6/FLAGc7cd25e24 [2021-11-19 13:32:45,192 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/88755951c/48df83753e7f4dc2b4c908b551947ca6 [2021-11-19 13:32:45,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:32:45,197 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:32:45,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:45,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:32:45,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:32:45,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:45" (1/1) ... [2021-11-19 13:32:45,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191431b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:45, skipping insertion in model container [2021-11-19 13:32:45,213 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:45" (1/1) ... [2021-11-19 13:32:45,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:32:45,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:32:46,188 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44118,44131] [2021-11-19 13:32:46,207 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44660,44673] [2021-11-19 13:32:46,453 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56247,56260] [2021-11-19 13:32:46,465 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56368,56381] [2021-11-19 13:32:46,476 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:46,506 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:32:46,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5919eb25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:46, skipping insertion in model container [2021-11-19 13:32:46,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:46,508 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:32:46,512 INFO L158 Benchmark]: Toolchain (without parser) took 1311.83ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 50.2MB in the beginning and 80.9MB in the end (delta: -30.7MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-11-19 13:32:46,514 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:32:46,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1308.18ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 50.1MB in the beginning and 80.9MB in the end (delta: -30.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. [2021-11-19 13:32:46,519 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 88.1MB. Free memory was 57.9MB in the beginning and 57.9MB in the end (delta: 23.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1308.18ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 50.1MB in the beginning and 80.9MB in the end (delta: -30.8MB). Peak memory consumption was 4.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 990]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs --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 ac848265e1daab3ca0f2905a3d0d6fdafaee38399ca7123ad8517babc999ef80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:32:49,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:32:49,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:32:49,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:32:49,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:32:49,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:32:49,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:32:49,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:32:49,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:32:49,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:32:49,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:32:49,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:32:49,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:32:49,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:32:49,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:32:49,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:32:49,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:32:49,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:32:49,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:32:49,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:32:49,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:32:49,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:32:49,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:32:49,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:32:49,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:32:49,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:32:49,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:32:49,524 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:32:49,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:32:49,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:32:49,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:32:49,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:32:49,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:32:49,532 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:32:49,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:32:49,535 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:32:49,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:32:49,536 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:32:49,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:32:49,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:32:49,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:32:49,547 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:32:49,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:32:49,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:32:49,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:32:49,604 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:32:49,604 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:32:49,604 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:32:49,605 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:32:49,605 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:32:49,605 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:32:49,605 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:32:49,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:32:49,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:32:49,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:32:49,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:32:49,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:32:49,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:32:49,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:32:49,610 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:32:49,610 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:32:49,610 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:32:49,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:32:49,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:32:49,611 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:32:49,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:32:49,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:32:49,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:32:49,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:32:49,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:32:49,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:32:49,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:32:49,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:32:49,613 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:32:49,614 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:49,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:32:49,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:32:49,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:32:49,615 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac848265e1daab3ca0f2905a3d0d6fdafaee38399ca7123ad8517babc999ef80 [2021-11-19 13:32:50,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:32:50,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:32:50,182 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:32:50,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:32:50,185 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:32:50,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i [2021-11-19 13:32:50,281 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/b2c030486/1c382d87c3954e4fa23e4b36ecbdd920/FLAG433111540 [2021-11-19 13:32:51,295 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:32:51,296 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i [2021-11-19 13:32:51,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/b2c030486/1c382d87c3954e4fa23e4b36ecbdd920/FLAG433111540 [2021-11-19 13:32:51,370 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/data/b2c030486/1c382d87c3954e4fa23e4b36ecbdd920 [2021-11-19 13:32:51,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:32:51,375 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:32:51,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:51,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:32:51,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:32:51,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:51" (1/1) ... [2021-11-19 13:32:51,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40473c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:51, skipping insertion in model container [2021-11-19 13:32:51,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:32:51" (1/1) ... [2021-11-19 13:32:51,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:32:51,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:32:52,299 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44118,44131] [2021-11-19 13:32:52,326 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44660,44673] [2021-11-19 13:32:52,474 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56247,56260] [2021-11-19 13:32:52,475 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56368,56381] [2021-11-19 13:32:52,487 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:52,515 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:32:52,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:32:52,603 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44118,44131] [2021-11-19 13:32:52,618 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44660,44673] [2021-11-19 13:32:52,761 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56247,56260] [2021-11-19 13:32:52,776 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56368,56381] [2021-11-19 13:32:52,782 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:52,804 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:32:52,842 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44118,44131] [2021-11-19 13:32:52,845 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[44660,44673] [2021-11-19 13:32:52,935 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56247,56260] [2021-11-19 13:32:52,936 WARN L230 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_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test6-1.i[56368,56381] [2021-11-19 13:32:52,940 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:32:53,071 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:32:53,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53 WrapperNode [2021-11-19 13:32:53,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:32:53,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:32:53,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:32:53,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:32:53,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,308 INFO L137 Inliner]: procedures = 285, calls = 294, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1038 [2021-11-19 13:32:53,308 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:32:53,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:32:53,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:32:53,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:32:53,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:32:53,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:32:53,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:32:53,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:32:53,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (1/1) ... [2021-11-19 13:32:53,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:32:53,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:32:53,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:32:53,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:32:53,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:32:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 13:32:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:32:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-19 13:32:53,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:32:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:32:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 13:32:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:32:53,631 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-19 13:32:53,632 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-19 13:32:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:32:53,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:32:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:32:53,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:32:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-19 13:32:53,633 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-19 13:32:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:32:53,633 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-19 13:32:53,633 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-19 13:32:53,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:32:53,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:32:54,028 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:32:54,030 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:33:01,655 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:33:01,668 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:33:01,669 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-19 13:33:01,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:01 BoogieIcfgContainer [2021-11-19 13:33:01,672 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:33:01,674 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:33:01,674 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:33:01,678 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:33:01,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:32:51" (1/3) ... [2021-11-19 13:33:01,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d39a14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:01, skipping insertion in model container [2021-11-19 13:33:01,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:32:53" (2/3) ... [2021-11-19 13:33:01,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d39a14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:33:01, skipping insertion in model container [2021-11-19 13:33:01,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:33:01" (3/3) ... [2021-11-19 13:33:01,682 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test6-1.i [2021-11-19 13:33:01,689 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:33:01,689 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-19 13:33:01,754 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:33:01,763 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 [2021-11-19 13:33:01,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 13:33:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 13:33:01,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 13:33:01,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:01,806 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:01,808 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-19 13:33:01,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:01,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992684981] [2021-11-19 13:33:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:01,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:01,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:01,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:01,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:33:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:33:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:02,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:02,254 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:02,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992684981] [2021-11-19 13:33:02,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992684981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:02,255 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:02,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:33:02,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272488545] [2021-11-19 13:33:02,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:02,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:33:02,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:02,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:33:02,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:33:02,314 INFO L87 Difference]: Start difference. First operand has 225 states, 203 states have (on average 1.6354679802955665) internal successors, (332), 207 states have internal predecessors, (332), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:02,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:02,397 INFO L93 Difference]: Finished difference Result 445 states and 724 transitions. [2021-11-19 13:33:02,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:33:02,400 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-19 13:33:02,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:02,419 INFO L225 Difference]: With dead ends: 445 [2021-11-19 13:33:02,419 INFO L226 Difference]: Without dead ends: 218 [2021-11-19 13:33:02,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:33:02,442 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:02,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:33:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-19 13:33:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-11-19 13:33:02,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 197 states have (on average 1.299492385786802) internal successors, (256), 202 states have internal predecessors, (256), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 13:33:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 281 transitions. [2021-11-19 13:33:02,554 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 281 transitions. Word has length 8 [2021-11-19 13:33:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:02,554 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 281 transitions. [2021-11-19 13:33:02,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 281 transitions. [2021-11-19 13:33:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 13:33:02,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:02,556 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:02,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:33:02,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:02,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:02,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-19 13:33:02,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:02,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548735217] [2021-11-19 13:33:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:02,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:02,769 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:02,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:33:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:33:02,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:03,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:03,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:03,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548735217] [2021-11-19 13:33:03,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548735217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:03,376 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:03,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-19 13:33:03,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777055187] [2021-11-19 13:33:03,377 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:03,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:33:03,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:03,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:33:03,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:33:03,382 INFO L87 Difference]: Start difference. First operand 218 states and 281 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:06,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:08,636 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:08,677 INFO L93 Difference]: Finished difference Result 551 states and 718 transitions. [2021-11-19 13:33:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:33:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-19 13:33:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:08,683 INFO L225 Difference]: With dead ends: 551 [2021-11-19 13:33:08,684 INFO L226 Difference]: Without dead ends: 335 [2021-11-19 13:33:08,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:33:08,687 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:08,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 751 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-19 13:33:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-19 13:33:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 325. [2021-11-19 13:33:08,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 304 states have (on average 1.3092105263157894) internal successors, (398), 309 states have internal predecessors, (398), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 13:33:08,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 423 transitions. [2021-11-19 13:33:08,726 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 423 transitions. Word has length 10 [2021-11-19 13:33:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:08,727 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 423 transitions. [2021-11-19 13:33:08,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 423 transitions. [2021-11-19 13:33:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 13:33:08,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:08,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:08,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:08,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:08,945 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1199048252, now seen corresponding path program 1 times [2021-11-19 13:33:08,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:08,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323641586] [2021-11-19 13:33:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:08,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:08,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:08,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:08,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:33:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:09,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:09,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:09,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:09,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:09,335 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 13:33:09,336 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 30 treesize of output 36 [2021-11-19 13:33:09,433 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 13:33:09,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 23 [2021-11-19 13:33:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:09,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:09,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:09,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323641586] [2021-11-19 13:33:09,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323641586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:09,620 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:09,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:33:09,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52966901] [2021-11-19 13:33:09,621 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:09,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:09,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:09,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:09,623 INFO L87 Difference]: Start difference. First operand 325 states and 423 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:14,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:16,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:22,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:22,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:22,791 INFO L93 Difference]: Finished difference Result 664 states and 870 transitions. [2021-11-19 13:33:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:33:22,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-19 13:33:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:22,798 INFO L225 Difference]: With dead ends: 664 [2021-11-19 13:33:22,798 INFO L226 Difference]: Without dead ends: 490 [2021-11-19 13:33:22,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:33:22,801 INFO L933 BasicCegarLoop]: 261 mSDtfsCounter, 229 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:22,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 1226 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 332 Invalid, 1 Unknown, 0 Unchecked, 13.1s Time] [2021-11-19 13:33:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-19 13:33:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 324. [2021-11-19 13:33:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 303 states have (on average 1.306930693069307) internal successors, (396), 308 states have internal predecessors, (396), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 13:33:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 421 transitions. [2021-11-19 13:33:22,859 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 421 transitions. Word has length 13 [2021-11-19 13:33:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:22,859 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 421 transitions. [2021-11-19 13:33:22,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 421 transitions. [2021-11-19 13:33:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 13:33:22,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:22,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:22,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:23,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:23,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1082818915, now seen corresponding path program 1 times [2021-11-19 13:33:23,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:23,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656329829] [2021-11-19 13:33:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:23,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:23,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:23,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:23,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:33:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:23,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:23,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:23,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:23,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:23,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656329829] [2021-11-19 13:33:23,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656329829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:23,658 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:23,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 13:33:23,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544200787] [2021-11-19 13:33:23,659 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:23,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:33:23,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:33:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:33:23,661 INFO L87 Difference]: Start difference. First operand 324 states and 421 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:23,843 INFO L93 Difference]: Finished difference Result 646 states and 846 transitions. [2021-11-19 13:33:23,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:33:23,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 13:33:23,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:23,847 INFO L225 Difference]: With dead ends: 646 [2021-11-19 13:33:23,848 INFO L226 Difference]: Without dead ends: 332 [2021-11-19 13:33:23,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:23,850 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 220 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:23,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 595 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:23,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-19 13:33:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2021-11-19 13:33:23,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 309 states have (on average 1.249190938511327) internal successors, (386), 314 states have internal predecessors, (386), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 13:33:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 411 transitions. [2021-11-19 13:33:23,897 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 411 transitions. Word has length 47 [2021-11-19 13:33:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:23,908 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 411 transitions. [2021-11-19 13:33:23,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 411 transitions. [2021-11-19 13:33:23,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 13:33:23,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:23,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:23,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:24,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:24,119 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:24,119 INFO L85 PathProgramCache]: Analyzing trace with hash 206381993, now seen corresponding path program 1 times [2021-11-19 13:33:24,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:24,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100690843] [2021-11-19 13:33:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:24,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:24,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:24,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:24,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:33:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:33:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:24,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:24,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:24,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100690843] [2021-11-19 13:33:24,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100690843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:24,721 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:24,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:33:24,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270738037] [2021-11-19 13:33:24,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:24,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:33:24,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:33:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:24,723 INFO L87 Difference]: Start difference. First operand 330 states and 411 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:24,915 INFO L93 Difference]: Finished difference Result 342 states and 423 transitions. [2021-11-19 13:33:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:33:24,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-19 13:33:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:24,920 INFO L225 Difference]: With dead ends: 342 [2021-11-19 13:33:24,921 INFO L226 Difference]: Without dead ends: 340 [2021-11-19 13:33:24,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:33:24,923 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 19 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:24,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 1319 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:24,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-19 13:33:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2021-11-19 13:33:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 316 states have (on average 1.2468354430379747) internal successors, (394), 322 states have internal predecessors, (394), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 13:33:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 421 transitions. [2021-11-19 13:33:24,951 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 421 transitions. Word has length 47 [2021-11-19 13:33:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:24,952 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 421 transitions. [2021-11-19 13:33:24,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 13:33:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 421 transitions. [2021-11-19 13:33:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 13:33:24,955 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:24,956 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:24,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:25,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:25,176 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:25,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1298801861, now seen corresponding path program 1 times [2021-11-19 13:33:25,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:25,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916673759] [2021-11-19 13:33:25,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:25,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:25,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:25,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:25,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:33:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:25,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:33:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:25,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:26,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:26,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916673759] [2021-11-19 13:33:26,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916673759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:26,323 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:26,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-19 13:33:26,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075445131] [2021-11-19 13:33:26,324 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:26,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:33:26,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:33:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:33:26,325 INFO L87 Difference]: Start difference. First operand 340 states and 421 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 13:33:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:26,673 INFO L93 Difference]: Finished difference Result 647 states and 811 transitions. [2021-11-19 13:33:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:33:26,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2021-11-19 13:33:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:26,678 INFO L225 Difference]: With dead ends: 647 [2021-11-19 13:33:26,678 INFO L226 Difference]: Without dead ends: 353 [2021-11-19 13:33:26,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:33:26,680 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 71 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:26,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1211 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:33:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-19 13:33:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2021-11-19 13:33:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 318 states have (on average 1.2452830188679245) internal successors, (396), 325 states have internal predecessors, (396), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-19 13:33:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 426 transitions. [2021-11-19 13:33:26,707 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 426 transitions. Word has length 62 [2021-11-19 13:33:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:26,708 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 426 transitions. [2021-11-19 13:33:26,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 7 states have internal predecessors, (64), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 13:33:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 426 transitions. [2021-11-19 13:33:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 13:33:26,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:26,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:26,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:26,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:26,929 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:26,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2017357497, now seen corresponding path program 1 times [2021-11-19 13:33:26,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:26,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215336655] [2021-11-19 13:33:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:26,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:26,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:26,932 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:26,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:33:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:27,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:33:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:27,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:27,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:27,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215336655] [2021-11-19 13:33:27,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215336655] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:27,632 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:33:27,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 13:33:27,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685463529] [2021-11-19 13:33:27,632 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:27,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:27,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:33:27,634 INFO L87 Difference]: Start difference. First operand 344 states and 426 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 13:33:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:27,795 INFO L93 Difference]: Finished difference Result 652 states and 817 transitions. [2021-11-19 13:33:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:33:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2021-11-19 13:33:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:27,801 INFO L225 Difference]: With dead ends: 652 [2021-11-19 13:33:27,801 INFO L226 Difference]: Without dead ends: 355 [2021-11-19 13:33:27,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:33:27,803 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 8 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:27,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1056 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:33:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-19 13:33:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2021-11-19 13:33:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 327 states have (on average 1.2507645259938838) internal successors, (409), 335 states have internal predecessors, (409), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (16), 13 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-19 13:33:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 440 transitions. [2021-11-19 13:33:27,831 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 440 transitions. Word has length 67 [2021-11-19 13:33:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:27,832 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 440 transitions. [2021-11-19 13:33:27,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 13:33:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 440 transitions. [2021-11-19 13:33:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 13:33:27,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:27,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:27,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:28,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:33:28,051 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:28,051 INFO L85 PathProgramCache]: Analyzing trace with hash 419792281, now seen corresponding path program 1 times [2021-11-19 13:33:28,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:28,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724895969] [2021-11-19 13:33:28,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:28,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:28,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:28,053 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:28,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:33:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:28,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:28,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:28,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:29,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:29,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724895969] [2021-11-19 13:33:29,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724895969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187199198] [2021-11-19 13:33:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:29,038 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:29,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:29,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-19 13:33:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:29,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:33:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:33:29,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:30,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1187199198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:30,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865232752] [2021-11-19 13:33:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:30,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:30,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:30,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:33:30,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 13:33:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:30,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:33:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 13:33:31,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865232752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:31,222 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:33:31,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 8, 7] total 21 [2021-11-19 13:33:31,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304046643] [2021-11-19 13:33:31,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:31,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:31,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:31,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:31,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:33:31,224 INFO L87 Difference]: Start difference. First operand 355 states and 440 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:33:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:32,035 INFO L93 Difference]: Finished difference Result 1943 states and 2472 transitions. [2021-11-19 13:33:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:33:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 69 [2021-11-19 13:33:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:32,049 INFO L225 Difference]: With dead ends: 1943 [2021-11-19 13:33:32,050 INFO L226 Difference]: Without dead ends: 1635 [2021-11-19 13:33:32,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:33:32,053 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1270 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:32,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1270 Valid, 2269 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 13:33:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-11-19 13:33:32,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1235. [2021-11-19 13:33:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1161 states have (on average 1.26442721791559) internal successors, (1468), 1174 states have internal predecessors, (1468), 43 states have call successors, (43), 23 states have call predecessors, (43), 27 states have return successors, (48), 37 states have call predecessors, (48), 41 states have call successors, (48) [2021-11-19 13:33:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1559 transitions. [2021-11-19 13:33:32,137 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1559 transitions. Word has length 69 [2021-11-19 13:33:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:32,138 INFO L470 AbstractCegarLoop]: Abstraction has 1235 states and 1559 transitions. [2021-11-19 13:33:32,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 13:33:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1559 transitions. [2021-11-19 13:33:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 13:33:32,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:32,149 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:32,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:32,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:32,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:32,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:32,768 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash -948266266, now seen corresponding path program 1 times [2021-11-19 13:33:32,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:32,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898493546] [2021-11-19 13:33:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:32,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:32,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:32,771 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:32,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:33:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:33,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:33:33,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:33:33,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:33,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898493546] [2021-11-19 13:33:33,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898493546] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:33,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069103030] [2021-11-19 13:33:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:33,926 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:33,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:33,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:33,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 13:33:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:34,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:33:34,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:33:34,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2069103030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:34,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955048988] [2021-11-19 13:33:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:34,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:34,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:34,967 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:33:34,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 13:33:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:35,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:33:35,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:35,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:35,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:35,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 13:33:35,484 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-19 13:33:35,484 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 30 treesize of output 36 [2021-11-19 13:33:35,586 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 13:33:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 67 treesize of output 23 [2021-11-19 13:33:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:33:35,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:33:35,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955048988] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:35,947 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:33:35,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-11-19 13:33:35,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092540081] [2021-11-19 13:33:35,948 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:35,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:33:35,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:33:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:33:35,950 INFO L87 Difference]: Start difference. First operand 1235 states and 1559 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 13:33:40,296 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:43,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:33:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:46,479 INFO L93 Difference]: Finished difference Result 1720 states and 2218 transitions. [2021-11-19 13:33:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:33:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 101 [2021-11-19 13:33:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:46,497 INFO L225 Difference]: With dead ends: 1720 [2021-11-19 13:33:46,498 INFO L226 Difference]: Without dead ends: 1696 [2021-11-19 13:33:46,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:33:46,502 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 209 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:46,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 895 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 232 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2021-11-19 13:33:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-11-19 13:33:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1527. [2021-11-19 13:33:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1446 states have (on average 1.281466113416321) internal successors, (1853), 1461 states have internal predecessors, (1853), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 13:33:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1958 transitions. [2021-11-19 13:33:46,635 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1958 transitions. Word has length 101 [2021-11-19 13:33:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:46,637 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 1958 transitions. [2021-11-19 13:33:46,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-19 13:33:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1958 transitions. [2021-11-19 13:33:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:33:46,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:46,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:46,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:46,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:47,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:47,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:47,264 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:47,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:47,265 INFO L85 PathProgramCache]: Analyzing trace with hash 281549929, now seen corresponding path program 1 times [2021-11-19 13:33:47,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:47,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814469623] [2021-11-19 13:33:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:47,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:47,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:47,267 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:47,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:33:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:47,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:47,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:33:48,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:33:48,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:48,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814469623] [2021-11-19 13:33:48,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814469623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:48,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [594709342] [2021-11-19 13:33:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:48,468 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:48,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:48,469 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:48,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 13:33:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:48,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 13:33:48,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:33:49,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 13:33:49,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [594709342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:33:49,313 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:33:49,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-19 13:33:49,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059540497] [2021-11-19 13:33:49,313 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:33:49,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 13:33:49,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:49,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 13:33:49,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:33:49,315 INFO L87 Difference]: Start difference. First operand 1527 states and 1958 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:33:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:49,408 INFO L93 Difference]: Finished difference Result 3012 states and 3874 transitions. [2021-11-19 13:33:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 13:33:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 113 [2021-11-19 13:33:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:49,420 INFO L225 Difference]: With dead ends: 3012 [2021-11-19 13:33:49,421 INFO L226 Difference]: Without dead ends: 1532 [2021-11-19 13:33:49,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:33:49,424 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 0 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:49,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 533 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:33:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-11-19 13:33:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1532. [2021-11-19 13:33:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1532 states, 1451 states have (on average 1.2804962095106822) internal successors, (1858), 1466 states have internal predecessors, (1858), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 13:33:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1532 states to 1532 states and 1963 transitions. [2021-11-19 13:33:49,528 INFO L78 Accepts]: Start accepts. Automaton has 1532 states and 1963 transitions. Word has length 113 [2021-11-19 13:33:49,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:49,529 INFO L470 AbstractCegarLoop]: Abstraction has 1532 states and 1963 transitions. [2021-11-19 13:33:49,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-19 13:33:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1532 states and 1963 transitions. [2021-11-19 13:33:49,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 13:33:49,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:49,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:49,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:49,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-19 13:33:49,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:49,954 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1641678105, now seen corresponding path program 1 times [2021-11-19 13:33:49,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:49,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160190604] [2021-11-19 13:33:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:49,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:49,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:49,957 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:49,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:33:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:50,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:33:50,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:33:51,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:51,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160190604] [2021-11-19 13:33:51,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160190604] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:51,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1849057055] [2021-11-19 13:33:51,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:51,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:51,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:51,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 13:33:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:51,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:33:51,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:33:52,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 13:33:52,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1849057055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:52,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338656986] [2021-11-19 13:33:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:52,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:52,320 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:33:52,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 13:33:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:33:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:33:52,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:33:53,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338656986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:53,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:33:53,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 14 [2021-11-19 13:33:53,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522408281] [2021-11-19 13:33:53,257 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:33:53,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 13:33:53,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:33:53,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 13:33:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-19 13:33:53,260 INFO L87 Difference]: Start difference. First operand 1532 states and 1963 transitions. Second operand has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:33:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:33:54,270 INFO L93 Difference]: Finished difference Result 3109 states and 4010 transitions. [2021-11-19 13:33:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 13:33:54,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 113 [2021-11-19 13:33:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:33:54,284 INFO L225 Difference]: With dead ends: 3109 [2021-11-19 13:33:54,284 INFO L226 Difference]: Without dead ends: 1600 [2021-11-19 13:33:54,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-11-19 13:33:54,292 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 95 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:33:54,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1851 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 13:33:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-11-19 13:33:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1564. [2021-11-19 13:33:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1483 states have (on average 1.2852326365475388) internal successors, (1906), 1498 states have internal predecessors, (1906), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 13:33:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 2011 transitions. [2021-11-19 13:33:54,420 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 2011 transitions. Word has length 113 [2021-11-19 13:33:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:33:54,421 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 2011 transitions. [2021-11-19 13:33:54,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:33:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 2011 transitions. [2021-11-19 13:33:54,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 13:33:54,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:33:54,424 INFO L514 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:33:54,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:54,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:54,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:33:55,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:55,046 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:33:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:33:55,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1776847847, now seen corresponding path program 2 times [2021-11-19 13:33:55,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:33:55,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770786043] [2021-11-19 13:33:55,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:33:55,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:33:55,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:33:55,049 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:33:55,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:33:56,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:33:56,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:33:56,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:33:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:33:56,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 13:33:57,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:33:57,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770786043] [2021-11-19 13:33:57,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770786043] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:57,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086053470] [2021-11-19 13:33:57,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:33:57,573 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:33:57,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:33:57,580 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:33:57,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 13:35:26,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:35:26,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:35:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:35:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 13:35:27,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 13:35:27,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086053470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:35:27,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314028071] [2021-11-19 13:35:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:35:27,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:35:27,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:35:27,644 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:35:27,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 13:40:06,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:40:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:40:06,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 13:40:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 13:40:06,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 13:40:07,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314028071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:40:07,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:40:07,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 27 [2021-11-19 13:40:07,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494991356] [2021-11-19 13:40:07,503 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:40:07,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 13:40:07,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:40:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 13:40:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-11-19 13:40:07,505 INFO L87 Difference]: Start difference. First operand 1564 states and 2011 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:40:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:40:11,073 INFO L93 Difference]: Finished difference Result 3253 states and 4218 transitions. [2021-11-19 13:40:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 13:40:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 121 [2021-11-19 13:40:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:40:11,085 INFO L225 Difference]: With dead ends: 3253 [2021-11-19 13:40:11,085 INFO L226 Difference]: Without dead ends: 1700 [2021-11-19 13:40:11,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1077, Invalid=2829, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 13:40:11,090 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 322 mSDsluCounter, 3751 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 4027 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:40:11,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 4027 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 13:40:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2021-11-19 13:40:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1628. [2021-11-19 13:40:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1547 states have (on average 1.2915319974143504) internal successors, (1998), 1562 states have internal predecessors, (1998), 50 states have call successors, (50), 23 states have call predecessors, (50), 27 states have return successors, (55), 42 states have call predecessors, (55), 48 states have call successors, (55) [2021-11-19 13:40:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2103 transitions. [2021-11-19 13:40:11,180 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2103 transitions. Word has length 121 [2021-11-19 13:40:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:40:11,180 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 2103 transitions. [2021-11-19 13:40:11,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 2 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 13:40:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2103 transitions. [2021-11-19 13:40:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:40:11,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:40:11,183 INFO L514 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:40:11,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:11,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:11,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:40:11,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:40:11,799 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-19 13:40:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:40:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash -189338137, now seen corresponding path program 3 times [2021-11-19 13:40:11,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:40:11,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174930998] [2021-11-19 13:40:11,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:40:11,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:40:11,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:40:11,802 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:40:11,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 13:40:27,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 13:40:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:40:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 13:40:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:40:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-19 13:40:27,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 213 proven. 108 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-19 13:40:29,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:29,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174930998] [2021-11-19 13:40:29,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174930998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:40:29,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2122018610] [2021-11-19 13:40:29,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:40:29,845 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:40:29,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:40:29,845 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:40:29,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ede4d042-6047-4c6b-b0ea-c7b3d00c251a/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process