./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF --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 4a058bd9944921e52018f99044f11f694f824f3f09daf510330544b4558ba193 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:19,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:19,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:19,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:19,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:19,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:19,731 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:19,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:19,736 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:19,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:19,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:19,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:19,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:19,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:19,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:19,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:19,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:19,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:19,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:19,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:19,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:19,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:19,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:19,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:19,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:19,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:19,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:19,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:19,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:19,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:19,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:19,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:19,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:19,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:19,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:19,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:19,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:19,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:19,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:19,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:19,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:19,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:31:19,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:19,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:19,833 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:19,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:19,834 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:19,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:19,835 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:19,835 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:31:19,835 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:19,835 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:19,836 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:31:19,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:31:19,837 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:19,837 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:31:19,837 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:31:19,838 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:31:19,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:19,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:19,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:31:19,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:19,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:19,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:19,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:19,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:19,840 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:19,841 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:19,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:19,841 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:19,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:19,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:19,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:19,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:19,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:19,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:19,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:19,845 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:31:19,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:31:19,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:19,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:19,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:19,846 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_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a058bd9944921e52018f99044f11f694f824f3f09daf510330544b4558ba193 [2021-11-13 01:31:20,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:20,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:20,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:20,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:20,168 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:20,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i [2021-11-13 01:31:20,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/4273ca020/8c335e4b129f4f9481d16c90b98e75b5/FLAGa6891263b [2021-11-13 01:31:20,893 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:31:20,899 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i [2021-11-13 01:31:20,934 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/4273ca020/8c335e4b129f4f9481d16c90b98e75b5/FLAGa6891263b [2021-11-13 01:31:21,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/4273ca020/8c335e4b129f4f9481d16c90b98e75b5 [2021-11-13 01:31:21,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:31:21,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:31:21,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:21,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:31:21,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:31:21,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:21" (1/1) ... [2021-11-13 01:31:21,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770232ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:21, skipping insertion in model container [2021-11-13 01:31:21,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:21" (1/1) ... [2021-11-13 01:31:21,130 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:31:21,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:21,834 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44118,44131] [2021-11-13 01:31:21,846 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44660,44673] [2021-11-13 01:31:21,945 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56247,56260] [2021-11-13 01:31:21,946 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56368,56381] [2021-11-13 01:31:21,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:21,974 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) [2021-11-13 01:31:21,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6211636d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:21, skipping insertion in model container [2021-11-13 01:31:21,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:21,976 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:31:21,978 INFO L158 Benchmark]: Toolchain (without parser) took 870.60ms. Allocated memory is still 100.7MB. Free memory was 55.5MB in the beginning and 61.0MB in the end (delta: -5.5MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-11-13 01:31:21,978 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 100.7MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:31:21,979 INFO L158 Benchmark]: CACSL2BoogieTranslator took 862.79ms. Allocated memory is still 100.7MB. Free memory was 55.3MB in the beginning and 61.0MB in the end (delta: -5.7MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2021-11-13 01:31:21,981 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 100.7MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 862.79ms. Allocated memory is still 100.7MB. Free memory was 55.3MB in the beginning and 61.0MB in the end (delta: -5.7MB). Peak memory consumption was 5.0MB. 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_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF --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 4a058bd9944921e52018f99044f11f694f824f3f09daf510330544b4558ba193 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:31:24,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:31:24,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:31:24,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:31:24,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:31:24,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:31:24,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:31:24,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:31:24,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:31:24,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:31:24,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:31:24,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:31:24,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:31:24,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:31:24,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:31:24,434 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:31:24,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:31:24,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:31:24,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:31:24,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:31:24,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:31:24,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:31:24,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:31:24,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:31:24,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:31:24,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:31:24,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:31:24,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:31:24,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:31:24,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:31:24,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:31:24,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:31:24,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:31:24,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:31:24,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:31:24,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:31:24,477 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:31:24,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:31:24,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:31:24,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:31:24,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:31:24,494 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:31:24,543 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:31:24,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:31:24,545 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:31:24,545 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:31:24,545 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:31:24,545 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:31:24,546 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:31:24,546 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:31:24,546 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:31:24,546 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:31:24,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:31:24,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:31:24,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:31:24,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:31:24,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:31:24,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:31:24,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:31:24,551 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:31:24,551 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:31:24,551 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:31:24,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:31:24,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:31:24,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:31:24,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:31:24,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:31:24,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:31:24,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:31:24,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:24,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:31:24,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:31:24,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:31:24,554 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:31:24,554 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:24,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:31:24,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:31:24,556 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:31:24,556 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_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4a058bd9944921e52018f99044f11f694f824f3f09daf510330544b4558ba193 [2021-11-13 01:31:24,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:31:25,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:31:25,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:31:25,029 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:31:25,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:31:25,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i [2021-11-13 01:31:25,123 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/fd63a5f2c/131db41ff7da470d935d9f752fb9329a/FLAGdc76d2713 [2021-11-13 01:31:25,908 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:31:25,908 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i [2021-11-13 01:31:25,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/fd63a5f2c/131db41ff7da470d935d9f752fb9329a/FLAGdc76d2713 [2021-11-13 01:31:26,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/data/fd63a5f2c/131db41ff7da470d935d9f752fb9329a [2021-11-13 01:31:26,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:31:26,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:31:26,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:26,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:31:26,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:31:26,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:26" (1/1) ... [2021-11-13 01:31:26,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45031757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:26, skipping insertion in model container [2021-11-13 01:31:26,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:31:26" (1/1) ... [2021-11-13 01:31:26,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:31:26,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:26,869 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44118,44131] [2021-11-13 01:31:26,894 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44660,44673] [2021-11-13 01:31:27,087 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56247,56260] [2021-11-13 01:31:27,088 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56368,56381] [2021-11-13 01:31:27,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:27,137 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:31:27,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:31:27,183 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44118,44131] [2021-11-13 01:31:27,189 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44660,44673] [2021-11-13 01:31:27,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56247,56260] [2021-11-13 01:31:27,274 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56368,56381] [2021-11-13 01:31:27,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:27,291 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:31:27,343 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44118,44131] [2021-11-13 01:31:27,345 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[44660,44673] [2021-11-13 01:31:27,416 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56247,56260] [2021-11-13 01:31:27,417 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test6-2.i[56368,56381] [2021-11-13 01:31:27,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:31:27,507 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:31:27,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27 WrapperNode [2021-11-13 01:31:27,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:31:27,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:27,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:31:27,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:31:27,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:31:27,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:31:27,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:31:27,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:31:27,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,690 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:31:27,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:31:27,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:31:27,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:31:27,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (1/1) ... [2021-11-13 01:31:27,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:31:27,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:27,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:31:27,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:31:27,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 01:31:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 01:31:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:31:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-13 01:31:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:31:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:31:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 01:31:27,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:31:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2021-11-13 01:31:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2021-11-13 01:31:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:31:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:31:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:31:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2021-11-13 01:31:27,889 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2021-11-13 01:31:27,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:31:27,890 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2021-11-13 01:31:27,890 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2021-11-13 01:31:27,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:31:27,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:31:33,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:31:33,817 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-13 01:31:33,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:33 BoogieIcfgContainer [2021-11-13 01:31:33,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:31:33,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:31:33,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:31:33,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:31:33,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:31:26" (1/3) ... [2021-11-13 01:31:33,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4cb160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:33, skipping insertion in model container [2021-11-13 01:31:33,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:31:27" (2/3) ... [2021-11-13 01:31:33,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f4cb160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:31:33, skipping insertion in model container [2021-11-13 01:31:33,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:31:33" (3/3) ... [2021-11-13 01:31:33,836 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test6-2.i [2021-11-13 01:31:33,846 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:31:33,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-13 01:31:33,931 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:31:33,937 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 [2021-11-13 01:31:33,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-13 01:31:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 01:31:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 01:31:33,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:33,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:33,971 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)] === [2021-11-13 01:31:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:33,977 INFO L85 PathProgramCache]: Analyzing trace with hash -720802776, now seen corresponding path program 1 times [2021-11-13 01:31:33,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:33,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940531989] [2021-11-13 01:31:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:33,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:33,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:34,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:31:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:34,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:31:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:34,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:34,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:34,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940531989] [2021-11-13 01:31:34,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940531989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:34,453 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:34,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:31:34,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951800520] [2021-11-13 01:31:34,456 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:31:34,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:34,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:31:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:31:34,514 INFO L87 Difference]: Start difference. First operand has 258 states, 234 states have (on average 1.6367521367521367) internal successors, (383), 238 states have internal predecessors, (383), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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) [2021-11-13 01:31:34,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:34,620 INFO L93 Difference]: Finished difference Result 511 states and 836 transitions. [2021-11-13 01:31:34,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:31:34,622 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 [2021-11-13 01:31:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:34,635 INFO L225 Difference]: With dead ends: 511 [2021-11-13 01:31:34,635 INFO L226 Difference]: Without dead ends: 251 [2021-11-13 01:31:34,641 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 [2021-11-13 01:31:34,645 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.95ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:34,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 7.95ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:31:34,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-11-13 01:31:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-11-13 01:31:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 228 states have (on average 1.3026315789473684) internal successors, (297), 232 states have internal predecessors, (297), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-13 01:31:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 327 transitions. [2021-11-13 01:31:34,727 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 327 transitions. Word has length 8 [2021-11-13 01:31:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:34,734 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 327 transitions. [2021-11-13 01:31:34,734 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) [2021-11-13 01:31:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 327 transitions. [2021-11-13 01:31:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 01:31:34,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:34,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:34,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:34,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:34,966 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)] === [2021-11-13 01:31:34,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1810590275, now seen corresponding path program 1 times [2021-11-13 01:31:34,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:34,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177521601] [2021-11-13 01:31:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:34,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:34,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:34,970 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:34,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:31:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:35,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:35,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:35,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:35,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177521601] [2021-11-13 01:31:35,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177521601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:35,457 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:35,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 01:31:35,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635492459] [2021-11-13 01:31:35,458 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:35,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:31:35,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:35,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:31:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:31:35,461 INFO L87 Difference]: Start difference. First operand 251 states and 327 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) [2021-11-13 01:31:37,878 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:40,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:40,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:40,650 INFO L93 Difference]: Finished difference Result 651 states and 857 transitions. [2021-11-13 01:31:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:40,652 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 [2021-11-13 01:31:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:40,657 INFO L225 Difference]: With dead ends: 651 [2021-11-13 01:31:40,657 INFO L226 Difference]: Without dead ends: 398 [2021-11-13 01:31:40,660 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 [2021-11-13 01:31:40,662 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 186 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4949.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.09ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5117.48ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:40,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 924 Invalid, 141 Unknown, 0 Unchecked, 10.09ms Time], IncrementalHoareTripleChecker [19 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 5117.48ms Time] [2021-11-13 01:31:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-13 01:31:40,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 361. [2021-11-13 01:31:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 335 states have (on average 1.31044776119403) internal successors, (439), 340 states have internal predecessors, (439), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:31:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 474 transitions. [2021-11-13 01:31:40,704 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 474 transitions. Word has length 10 [2021-11-13 01:31:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:40,705 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 474 transitions. [2021-11-13 01:31:40,705 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) [2021-11-13 01:31:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 474 transitions. [2021-11-13 01:31:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 01:31:40,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:40,707 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:31:40,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:40,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:40,927 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)] === [2021-11-13 01:31:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1195077116, now seen corresponding path program 1 times [2021-11-13 01:31:40,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:40,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019422327] [2021-11-13 01:31:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:40,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:40,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:40,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:40,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:31:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:41,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:41,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:31:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:31:41,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:31:41,351 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-13 01:31:41,352 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 [2021-11-13 01:31:41,431 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-13 01:31:41,432 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 [2021-11-13 01:31:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:41,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:41,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:41,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019422327] [2021-11-13 01:31:41,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019422327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:41,585 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:41,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:31:41,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336780119] [2021-11-13 01:31:41,586 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:31:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:31:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:41,587 INFO L87 Difference]: Start difference. First operand 361 states and 474 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) [2021-11-13 01:31:45,621 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:31:48,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:48,625 INFO L93 Difference]: Finished difference Result 762 states and 1008 transitions. [2021-11-13 01:31:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:31:48,626 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 [2021-11-13 01:31:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:48,631 INFO L225 Difference]: With dead ends: 762 [2021-11-13 01:31:48,631 INFO L226 Difference]: Without dead ends: 552 [2021-11-13 01:31:48,632 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 [2021-11-13 01:31:48,634 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 435 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6672.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.23ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6947.36ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:48,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 965 Invalid, 241 Unknown, 0 Unchecked, 9.23ms Time], IncrementalHoareTripleChecker [14 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 6947.36ms Time] [2021-11-13 01:31:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-13 01:31:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 360. [2021-11-13 01:31:48,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 334 states have (on average 1.3083832335329342) internal successors, (437), 339 states have internal predecessors, (437), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:31:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 472 transitions. [2021-11-13 01:31:48,668 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 472 transitions. Word has length 13 [2021-11-13 01:31:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:48,668 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 472 transitions. [2021-11-13 01:31:48,669 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) [2021-11-13 01:31:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 472 transitions. [2021-11-13 01:31:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 01:31:48,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:48,671 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] [2021-11-13 01:31:48,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:48,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:48,887 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)] === [2021-11-13 01:31:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:48,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1739977374, now seen corresponding path program 1 times [2021-11-13 01:31:48,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:48,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712068658] [2021-11-13 01:31:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:48,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:48,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:48,892 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:48,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:31:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:49,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:31:49,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:49,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:49,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:49,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712068658] [2021-11-13 01:31:49,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712068658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:49,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:49,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:31:49,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648792311] [2021-11-13 01:31:49,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:49,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:31:49,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:49,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:31:49,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:31:49,436 INFO L87 Difference]: Start difference. First operand 360 states and 472 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) [2021-11-13 01:31:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:49,578 INFO L93 Difference]: Finished difference Result 718 states and 948 transitions. [2021-11-13 01:31:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:31:49,579 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 [2021-11-13 01:31:49,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:49,582 INFO L225 Difference]: With dead ends: 718 [2021-11-13 01:31:49,582 INFO L226 Difference]: Without dead ends: 368 [2021-11-13 01:31:49,583 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 [2021-11-13 01:31:49,585 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 261 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.13ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.49ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:49,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 691 Invalid, 69 Unknown, 0 Unchecked, 4.13ms Time], IncrementalHoareTripleChecker [30 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 102.49ms Time] [2021-11-13 01:31:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-13 01:31:49,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 366. [2021-11-13 01:31:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 340 states have (on average 1.2558823529411764) internal successors, (427), 345 states have internal predecessors, (427), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:31:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 462 transitions. [2021-11-13 01:31:49,610 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 462 transitions. Word has length 47 [2021-11-13 01:31:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:49,611 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 462 transitions. [2021-11-13 01:31:49,611 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) [2021-11-13 01:31:49,611 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 462 transitions. [2021-11-13 01:31:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 01:31:49,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:49,613 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] [2021-11-13 01:31:49,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:49,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:49,827 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)] === [2021-11-13 01:31:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1265789014, now seen corresponding path program 1 times [2021-11-13 01:31:49,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:49,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588074163] [2021-11-13 01:31:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:49,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:49,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:49,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:49,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:31:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:50,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:50,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:50,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:50,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:50,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588074163] [2021-11-13 01:31:50,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588074163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:50,368 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:50,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 01:31:50,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840301839] [2021-11-13 01:31:50,368 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:50,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:31:50,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:31:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:31:50,370 INFO L87 Difference]: Start difference. First operand 366 states and 462 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) [2021-11-13 01:31:50,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:50,524 INFO L93 Difference]: Finished difference Result 378 states and 474 transitions. [2021-11-13 01:31:50,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:31:50,525 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 [2021-11-13 01:31:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:50,528 INFO L225 Difference]: With dead ends: 378 [2021-11-13 01:31:50,529 INFO L226 Difference]: Without dead ends: 376 [2021-11-13 01:31:50,529 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 [2021-11-13 01:31:50,531 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 17 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.14ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:50,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 1858 Invalid, 42 Unknown, 0 Unchecked, 6.14ms Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 104.34ms Time] [2021-11-13 01:31:50,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-13 01:31:50,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2021-11-13 01:31:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 347 states have (on average 1.2536023054755043) internal successors, (435), 353 states have internal predecessors, (435), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 01:31:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 472 transitions. [2021-11-13 01:31:50,558 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 472 transitions. Word has length 47 [2021-11-13 01:31:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:50,559 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 472 transitions. [2021-11-13 01:31:50,559 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) [2021-11-13 01:31:50,560 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 472 transitions. [2021-11-13 01:31:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 01:31:50,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:50,562 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] [2021-11-13 01:31:50,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-13 01:31:50,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:50,779 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)] === [2021-11-13 01:31:50,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:50,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1360052348, now seen corresponding path program 1 times [2021-11-13 01:31:50,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:50,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644254984] [2021-11-13 01:31:50,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:50,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:50,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:50,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:50,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:31:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:51,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:51,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:51,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644254984] [2021-11-13 01:31:51,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644254984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:51,802 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:51,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 9 [2021-11-13 01:31:51,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101515932] [2021-11-13 01:31:51,803 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:51,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 01:31:51,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:51,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 01:31:51,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:31:51,804 INFO L87 Difference]: Start difference. First operand 376 states and 472 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) [2021-11-13 01:31:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:52,207 INFO L93 Difference]: Finished difference Result 719 states and 913 transitions. [2021-11-13 01:31:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:31:52,208 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 [2021-11-13 01:31:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:52,213 INFO L225 Difference]: With dead ends: 719 [2021-11-13 01:31:52,213 INFO L226 Difference]: Without dead ends: 389 [2021-11-13 01:31:52,214 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 [2021-11-13 01:31:52,215 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 71 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 301.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1712 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.99ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 343.71ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:52,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1712 Invalid, 164 Unknown, 0 Unchecked, 8.99ms Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 343.71ms Time] [2021-11-13 01:31:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-13 01:31:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 380. [2021-11-13 01:31:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 349 states have (on average 1.2521489971346704) internal successors, (437), 356 states have internal predecessors, (437), 20 states have call successors, (20), 6 states have call predecessors, (20), 7 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-11-13 01:31:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 477 transitions. [2021-11-13 01:31:52,243 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 477 transitions. Word has length 62 [2021-11-13 01:31:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:52,243 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 477 transitions. [2021-11-13 01:31:52,244 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) [2021-11-13 01:31:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 477 transitions. [2021-11-13 01:31:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 01:31:52,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:52,247 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] [2021-11-13 01:31:52,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:52,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:52,467 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)] === [2021-11-13 01:31:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1778039099, now seen corresponding path program 1 times [2021-11-13 01:31:52,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:52,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859879578] [2021-11-13 01:31:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:52,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:52,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:52,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:52,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:31:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:52,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:52,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:52,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:53,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:53,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859879578] [2021-11-13 01:31:53,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859879578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:53,218 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:31:53,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 01:31:53,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094070892] [2021-11-13 01:31:53,219 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:53,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:31:53,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:31:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:31:53,221 INFO L87 Difference]: Start difference. First operand 380 states and 477 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) [2021-11-13 01:31:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:53,360 INFO L93 Difference]: Finished difference Result 724 states and 919 transitions. [2021-11-13 01:31:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:31:53,361 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 [2021-11-13 01:31:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:53,369 INFO L225 Difference]: With dead ends: 724 [2021-11-13 01:31:53,370 INFO L226 Difference]: Without dead ends: 391 [2021-11-13 01:31:53,371 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 [2021-11-13 01:31:53,373 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 12 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:53,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 625 Invalid, 32 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 78.38ms Time] [2021-11-13 01:31:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-13 01:31:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2021-11-13 01:31:53,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 358 states have (on average 1.2569832402234637) internal successors, (450), 366 states have internal predecessors, (450), 20 states have call successors, (20), 7 states have call predecessors, (20), 9 states have return successors, (21), 18 states have call predecessors, (21), 19 states have call successors, (21) [2021-11-13 01:31:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 491 transitions. [2021-11-13 01:31:53,407 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 491 transitions. Word has length 67 [2021-11-13 01:31:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:53,409 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 491 transitions. [2021-11-13 01:31:53,410 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) [2021-11-13 01:31:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 491 transitions. [2021-11-13 01:31:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 01:31:53,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:53,422 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] [2021-11-13 01:31:53,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:53,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:31:53,635 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)] === [2021-11-13 01:31:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1248071707, now seen corresponding path program 1 times [2021-11-13 01:31:53,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:53,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277464492] [2021-11-13 01:31:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:53,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:53,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:53,638 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:53,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:31:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:53,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:31:53,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:54,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:31:54,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:54,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [277464492] [2021-11-13 01:31:54,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [277464492] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:54,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [975375111] [2021-11-13 01:31:54,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:54,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:54,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:31:54,567 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:31:54,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 01:31:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:31:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:31:55,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 01:31:55,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [975375111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:55,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051841150] [2021-11-13 01:31:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:55,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:55,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:55,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:55,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 01:31:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:56,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:31:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 01:31:56,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 01:31:56,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051841150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:31:56,359 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:31:56,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 8, 7] total 21 [2021-11-13 01:31:56,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144604713] [2021-11-13 01:31:56,360 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:31:56,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:31:56,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:31:56,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:31:56,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-11-13 01:31:56,361 INFO L87 Difference]: Start difference. First operand 391 states and 491 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) [2021-11-13 01:31:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:31:57,096 INFO L93 Difference]: Finished difference Result 2188 states and 2820 transitions. [2021-11-13 01:31:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:31:57,097 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 [2021-11-13 01:31:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:31:57,116 INFO L225 Difference]: With dead ends: 2188 [2021-11-13 01:31:57,117 INFO L226 Difference]: Without dead ends: 1844 [2021-11-13 01:31:57,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:31:57,119 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 1676 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 475.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.97ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 580.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:31:57,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 2151 Invalid, 250 Unknown, 0 Unchecked, 13.97ms Time], IncrementalHoareTripleChecker [80 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 580.00ms Time] [2021-11-13 01:31:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-11-13 01:31:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1397. [2021-11-13 01:31:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1296 states have (on average 1.2708333333333333) internal successors, (1647), 1313 states have internal predecessors, (1647), 68 states have call successors, (68), 25 states have call predecessors, (68), 29 states have return successors, (71), 58 states have call predecessors, (71), 64 states have call successors, (71) [2021-11-13 01:31:57,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1786 transitions. [2021-11-13 01:31:57,221 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1786 transitions. Word has length 69 [2021-11-13 01:31:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:31:57,222 INFO L470 AbstractCegarLoop]: Abstraction has 1397 states and 1786 transitions. [2021-11-13 01:31:57,222 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) [2021-11-13 01:31:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1786 transitions. [2021-11-13 01:31:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 01:31:57,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:31:57,225 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] [2021-11-13 01:31:57,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:57,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:57,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:31:57,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:57,842 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)] === [2021-11-13 01:31:57,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:31:57,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2003267831, now seen corresponding path program 1 times [2021-11-13 01:31:57,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:31:57,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2049039214] [2021-11-13 01:31:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:57,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:31:57,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:31:57,852 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:31:57,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:31:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:31:58,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:31:58,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:31:58,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:31:58,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2049039214] [2021-11-13 01:31:58,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2049039214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:58,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1286560809] [2021-11-13 01:31:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:58,897 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:31:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:31:58,899 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:31:58,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-13 01:31:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:31:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:31:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:31:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:31:59,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:31:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:31:59,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1286560809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:31:59,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548614173] [2021-11-13 01:31:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:31:59,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:31:59,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:31:59,839 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:31:59,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 01:32:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:00,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:32:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:00,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:00,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:00,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 01:32:00,325 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-13 01:32:00,326 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 [2021-11-13 01:32:00,419 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-13 01:32:00,420 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 [2021-11-13 01:32:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:32:00,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 01:32:00,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548614173] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:00,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-13 01:32:00,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-11-13 01:32:00,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918299186] [2021-11-13 01:32:00,672 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:00,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:32:00,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:00,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:32:00,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:32:00,674 INFO L87 Difference]: Start difference. First operand 1397 states and 1786 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) [2021-11-13 01:32:05,258 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 [] [2021-11-13 01:32:06,589 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 01:32:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:11,961 INFO L93 Difference]: Finished difference Result 2058 states and 2681 transitions. [2021-11-13 01:32:11,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:32:11,964 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 [2021-11-13 01:32:11,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:11,977 INFO L225 Difference]: With dead ends: 2058 [2021-11-13 01:32:11,977 INFO L226 Difference]: Without dead ends: 1858 [2021-11-13 01:32:11,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:32:11,982 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 209 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10749.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.12ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11092.16ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:11,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1352 Invalid, 295 Unknown, 0 Unchecked, 6.12ms Time], IncrementalHoareTripleChecker [5 Valid, 289 Invalid, 1 Unknown, 0 Unchecked, 11092.16ms Time] [2021-11-13 01:32:11,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-11-13 01:32:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1689. [2021-11-13 01:32:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1581 states have (on average 1.2852624920936115) internal successors, (2032), 1600 states have internal predecessors, (2032), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 01:32:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2185 transitions. [2021-11-13 01:32:12,103 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2185 transitions. Word has length 101 [2021-11-13 01:32:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:12,105 INFO L470 AbstractCegarLoop]: Abstraction has 1689 states and 2185 transitions. [2021-11-13 01:32:12,105 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) [2021-11-13 01:32:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2185 transitions. [2021-11-13 01:32:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 01:32:12,107 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:12,107 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] [2021-11-13 01:32:12,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:12,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-13 01:32:12,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:12,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:12,724 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)] === [2021-11-13 01:32:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -568346325, now seen corresponding path program 1 times [2021-11-13 01:32:12,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:12,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479928417] [2021-11-13 01:32:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:12,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:12,726 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:12,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:32:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:32:13,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 01:32:13,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:13,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479928417] [2021-11-13 01:32:13,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479928417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:13,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377263539] [2021-11-13 01:32:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:13,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:32:13,923 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:32:13,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:32:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:32:14,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:32:14,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 01:32:14,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [377263539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:32:14,696 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:32:14,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6, 6] total 11 [2021-11-13 01:32:14,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500801752] [2021-11-13 01:32:14,697 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:32:14,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:32:14,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:14,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:32:14,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:32:14,698 INFO L87 Difference]: Start difference. First operand 1689 states and 2185 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) [2021-11-13 01:32:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:14,799 INFO L93 Difference]: Finished difference Result 3336 states and 4328 transitions. [2021-11-13 01:32:14,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:32:14,800 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 [2021-11-13 01:32:14,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:14,810 INFO L225 Difference]: With dead ends: 3336 [2021-11-13 01:32:14,810 INFO L226 Difference]: Without dead ends: 1694 [2021-11-13 01:32:14,814 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 [2021-11-13 01:32:14,815 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 0 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.51ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:14,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 625 Invalid, 6 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 27.51ms Time] [2021-11-13 01:32:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2021-11-13 01:32:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1694. [2021-11-13 01:32:14,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1586 states have (on average 1.2843631778058007) internal successors, (2037), 1605 states have internal predecessors, (2037), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 01:32:14,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2190 transitions. [2021-11-13 01:32:14,901 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2190 transitions. Word has length 113 [2021-11-13 01:32:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:14,901 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 2190 transitions. [2021-11-13 01:32:14,901 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) [2021-11-13 01:32:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2190 transitions. [2021-11-13 01:32:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 01:32:14,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:14,905 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] [2021-11-13 01:32:14,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:15,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:15,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:15,319 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)] === [2021-11-13 01:32:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:15,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1803392937, now seen corresponding path program 1 times [2021-11-13 01:32:15,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:15,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400251134] [2021-11-13 01:32:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:15,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:15,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:15,323 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:15,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:32:15,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:32:15,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 01:32:16,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:16,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400251134] [2021-11-13 01:32:16,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400251134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:16,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1917204103] [2021-11-13 01:32:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:16,351 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:16,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:32:16,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:32:16,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-13 01:32:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:16,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:32:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:32:17,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 01:32:17,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1917204103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:17,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278773416] [2021-11-13 01:32:17,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:32:17,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:32:17,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:32:17,344 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:32:17,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 01:32:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:32:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:32:17,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 01:32:17,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:32:18,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278773416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:18,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:32:18,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 14 [2021-11-13 01:32:18,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600277000] [2021-11-13 01:32:18,249 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:32:18,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 01:32:18,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:32:18,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 01:32:18,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-13 01:32:18,251 INFO L87 Difference]: Start difference. First operand 1694 states and 2190 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) [2021-11-13 01:32:19,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:32:19,108 INFO L93 Difference]: Finished difference Result 3433 states and 4464 transitions. [2021-11-13 01:32:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 01:32:19,109 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 [2021-11-13 01:32:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:32:19,120 INFO L225 Difference]: With dead ends: 3433 [2021-11-13 01:32:19,120 INFO L226 Difference]: Without dead ends: 1762 [2021-11-13 01:32:19,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:32:19,125 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 86 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.18ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.02ms IncrementalHoareTripleChecker+Time [2021-11-13 01:32:19,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 2481 Invalid, 155 Unknown, 0 Unchecked, 4.18ms Time], IncrementalHoareTripleChecker [33 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 296.02ms Time] [2021-11-13 01:32:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-11-13 01:32:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1726. [2021-11-13 01:32:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1618 states have (on average 1.288627935723115) internal successors, (2085), 1637 states have internal predecessors, (2085), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 01:32:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2238 transitions. [2021-11-13 01:32:19,209 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2238 transitions. Word has length 113 [2021-11-13 01:32:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:32:19,210 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2238 transitions. [2021-11-13 01:32:19,210 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) [2021-11-13 01:32:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2238 transitions. [2021-11-13 01:32:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 01:32:19,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:32:19,212 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] [2021-11-13 01:32:19,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:19,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:19,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:32:19,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:32:19,829 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)] === [2021-11-13 01:32:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:32:19,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1978009513, now seen corresponding path program 2 times [2021-11-13 01:32:19,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:32:19,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282185304] [2021-11-13 01:32:19,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:32:19,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:32:19,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:32:19,832 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:32:19,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:32:20,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:32:20,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:32:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:32:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:21,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 01:32:22,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:32:22,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282185304] [2021-11-13 01:32:22,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282185304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:22,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839883079] [2021-11-13 01:32:22,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:32:22,039 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:32:22,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:32:22,043 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:32:22,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-13 01:32:48,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:32:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:32:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:32:48,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:32:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 67 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:32:48,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:32:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 01:32:49,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839883079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:32:49,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788742205] [2021-11-13 01:32:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:32:49,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:32:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:32:49,379 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:32:49,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 01:39:40,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:39:40,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 01:39:40,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 76 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:39:40,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 01:39:41,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788742205] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:41,616 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:39:41,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 27 [2021-11-13 01:39:41,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748723748] [2021-11-13 01:39:41,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:39:41,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 01:39:41,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:39:41,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 01:39:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:39:41,620 INFO L87 Difference]: Start difference. First operand 1726 states and 2238 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) [2021-11-13 01:39:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:39:45,812 INFO L93 Difference]: Finished difference Result 3577 states and 4672 transitions. [2021-11-13 01:39:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 01:39:45,813 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 [2021-11-13 01:39:45,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:39:45,826 INFO L225 Difference]: With dead ends: 3577 [2021-11-13 01:39:45,826 INFO L226 Difference]: Without dead ends: 1862 [2021-11-13 01:39:45,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 695 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1077, Invalid=2829, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 01:39:45,833 INFO L933 BasicCegarLoop]: 322 mSDtfsCounter, 304 mSDsluCounter, 4697 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 898.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 5019 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.70ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1024.99ms IncrementalHoareTripleChecker+Time [2021-11-13 01:39:45,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 5019 Invalid, 528 Unknown, 0 Unchecked, 8.70ms Time], IncrementalHoareTripleChecker [122 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 1024.99ms Time] [2021-11-13 01:39:45,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-11-13 01:39:45,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1790. [2021-11-13 01:39:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1682 states have (on average 1.2942925089179549) internal successors, (2177), 1701 states have internal predecessors, (2177), 75 states have call successors, (75), 25 states have call predecessors, (75), 29 states have return successors, (78), 63 states have call predecessors, (78), 71 states have call successors, (78) [2021-11-13 01:39:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2330 transitions. [2021-11-13 01:39:45,942 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2330 transitions. Word has length 121 [2021-11-13 01:39:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:39:45,942 INFO L470 AbstractCegarLoop]: Abstraction has 1790 states and 2330 transitions. [2021-11-13 01:39:45,943 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) [2021-11-13 01:39:45,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2330 transitions. [2021-11-13 01:39:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 01:39:45,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:39:45,945 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] [2021-11-13 01:39:45,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:46,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:46,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:39:46,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:39:46,560 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)] === [2021-11-13 01:39:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:39:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash -64378967, now seen corresponding path program 3 times [2021-11-13 01:39:46,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:39:46,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400440180] [2021-11-13 01:39:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:39:46,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:39:46,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:39:46,562 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:39:46,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 01:39:59,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-13 01:39:59,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:39:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 01:39:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-13 01:40:00,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 213 proven. 108 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-13 01:40:02,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:40:02,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400440180] [2021-11-13 01:40:02,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400440180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:40:02,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [730294127] [2021-11-13 01:40:02,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:40:02,347 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:40:02,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:40:02,348 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:40:02,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3f3d729d-1d26-4c4d-b3ab-c96a2c68a8d9/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process