./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7a14ff88669e01083ca46db0c80d319fe5a2f969bf71d428fc27ed5e7149831c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:33:53,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:33:53,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:33:53,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:33:53,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:33:53,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:33:53,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:33:53,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:33:53,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:33:53,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:33:53,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:33:53,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:33:53,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:33:53,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:33:53,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:33:53,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:33:53,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:33:53,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:33:53,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:33:53,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:33:53,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:33:53,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:33:53,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:33:53,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:33:53,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:33:53,840 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:33:53,840 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:33:53,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:33:53,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:33:53,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:33:53,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:33:53,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:33:53,850 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:33:53,851 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:33:53,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:33:53,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:33:53,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:33:53,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:33:53,855 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:33:53,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:33:53,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:33:53,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:33:53,910 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:33:53,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:33:53,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:33:53,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:33:53,913 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:33:53,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:33:53,913 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:33:53,914 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:33:53,921 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:33:53,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:33:53,923 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:33:53,923 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:33:53,923 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:33:53,924 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:33:53,924 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:33:53,924 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:33:53,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:33:53,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:33:53,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:33:53,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:33:53,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:33:53,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:33:53,927 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:33:53,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:33:53,928 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:33:53,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:33:53,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:33:53,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:33:53,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:33:53,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:33:53,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:33:53,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:33:53,932 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:33:53,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:33:53,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:33:53,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:33:53,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:33:53,934 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_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a14ff88669e01083ca46db0c80d319fe5a2f969bf71d428fc27ed5e7149831c [2021-11-19 13:33:54,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:33:54,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:33:54,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:33:54,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:33:54,269 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:33:54,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i [2021-11-19 13:33:54,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/2f8e298e4/ef4dcc81f8d54dd0b8c25e4d09b04c2a/FLAGe607a9758 [2021-11-19 13:33:55,244 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:33:55,249 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i [2021-11-19 13:33:55,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/2f8e298e4/ef4dcc81f8d54dd0b8c25e4d09b04c2a/FLAGe607a9758 [2021-11-19 13:33:55,703 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/2f8e298e4/ef4dcc81f8d54dd0b8c25e4d09b04c2a [2021-11-19 13:33:55,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:33:55,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:33:55,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:55,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:33:55,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:33:55,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:55" (1/1) ... [2021-11-19 13:33:55,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682901f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:55, skipping insertion in model container [2021-11-19 13:33:55,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:33:55" (1/1) ... [2021-11-19 13:33:55,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:33:55,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:33:56,167 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4510,4523] [2021-11-19 13:33:56,175 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4570,4583] [2021-11-19 13:33:56,204 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:33:56,211 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:33:57,250 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,252 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,252 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,253 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,255 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,274 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,275 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,283 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,286 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:57,802 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:33:57,804 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:33:57,805 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:33:57,806 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:33:57,808 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:33:57,809 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:33:57,810 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:33:57,811 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:33:57,812 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:33:57,813 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:33:58,135 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:33:58,268 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:58,268 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:33:58,390 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:33:58,473 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:33:58,475 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@523442ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:33:58, skipping insertion in model container [2021-11-19 13:33:58,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:33:58,476 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:33:58,478 INFO L158 Benchmark]: Toolchain (without parser) took 2769.84ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 63.5MB in the beginning and 59.5MB in the end (delta: 4.0MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. [2021-11-19 13:33:58,479 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 94.4MB. Free memory was 68.9MB in the beginning and 68.8MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:33:58,481 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2767.27ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 63.2MB in the beginning and 59.5MB in the end (delta: 3.7MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. [2021-11-19 13:33:58,483 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 94.4MB. Free memory was 68.9MB in the beginning and 68.8MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2767.27ms. Allocated memory was 94.4MB in the beginning and 113.2MB in the end (delta: 18.9MB). Free memory was 63.2MB in the beginning and 59.5MB in the end (delta: 3.7MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6990]: 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_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7a14ff88669e01083ca46db0c80d319fe5a2f969bf71d428fc27ed5e7149831c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:34:01,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:34:01,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:34:01,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:34:01,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:34:01,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:34:01,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:34:01,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:34:01,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:34:01,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:34:01,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:34:01,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:34:01,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:34:01,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:34:01,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:34:01,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:34:01,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:34:01,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:34:01,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:34:01,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:34:01,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:34:01,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:34:01,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:34:01,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:34:01,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:34:01,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:34:01,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:34:01,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:34:01,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:34:01,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:34:01,183 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:34:01,184 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:34:01,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:34:01,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:34:01,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:34:01,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:34:01,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:34:01,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:34:01,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:34:01,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:34:01,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:34:01,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:34:01,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:34:01,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:34:01,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:34:01,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:34:01,290 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:34:01,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:34:01,291 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:34:01,291 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:34:01,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:34:01,291 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:34:01,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:34:01,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:34:01,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:34:01,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:34:01,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:34:01,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:34:01,296 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:34:01,297 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:34:01,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:34:01,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:34:01,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:34:01,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:34:01,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:34:01,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:34:01,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:34:01,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:34:01,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:34:01,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:34:01,300 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:34:01,300 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:34:01,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:34:01,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:34:01,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:34:01,301 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_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a14ff88669e01083ca46db0c80d319fe5a2f969bf71d428fc27ed5e7149831c [2021-11-19 13:34:01,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:34:01,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:34:01,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:34:01,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:34:01,833 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:34:01,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i [2021-11-19 13:34:01,939 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/777ad21f2/6d9df069c0ca4b6db92b41b56bf9e205/FLAGdbfbdcc71 [2021-11-19 13:34:03,098 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:34:03,101 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i [2021-11-19 13:34:03,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/777ad21f2/6d9df069c0ca4b6db92b41b56bf9e205/FLAGdbfbdcc71 [2021-11-19 13:34:03,195 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/data/777ad21f2/6d9df069c0ca4b6db92b41b56bf9e205 [2021-11-19 13:34:03,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:34:03,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:34:03,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:03,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:34:03,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:34:03,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:03" (1/1) ... [2021-11-19 13:34:03,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1caed6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:03, skipping insertion in model container [2021-11-19 13:34:03,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:34:03" (1/1) ... [2021-11-19 13:34:03,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:34:03,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:34:03,763 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4510,4523] [2021-11-19 13:34:03,772 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4570,4583] [2021-11-19 13:34:03,812 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:34:03,822 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:34:05,119 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,120 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,121 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,122 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,123 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,142 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,143 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,146 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,147 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:05,745 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:34:05,747 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:34:05,749 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:34:05,750 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:34:05,752 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:34:05,753 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:34:05,754 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:34:05,755 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:34:05,755 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:34:05,756 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:34:06,003 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:34:06,181 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,187 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,352 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:06,451 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:34:06,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:34:06,533 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4510,4523] [2021-11-19 13:34:06,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4570,4583] [2021-11-19 13:34:06,538 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:34:06,542 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:34:06,613 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,615 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,616 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,616 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,617 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,660 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,660 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,662 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,662 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,728 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:34:06,729 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:34:06,730 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:34:06,731 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:34:06,735 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:34:06,736 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:34:06,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:34:06,737 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:34:06,738 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:34:06,745 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:34:06,779 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:34:06,882 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,882 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:06,928 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:07,009 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:34:07,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4510,4523] [2021-11-19 13:34:07,042 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/sv-benchmarks/c/aws-c-common/aws_byte_buf_write_from_whole_buffer_harness.i[4570,4583] [2021-11-19 13:34:07,044 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:34:07,046 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:34:07,098 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,099 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,099 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,100 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,101 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,107 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,108 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,109 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,110 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,151 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:34:07,152 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:34:07,153 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:34:07,154 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:34:07,155 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:34:07,156 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:34:07,157 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:34:07,157 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:34:07,158 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:34:07,159 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:34:07,192 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:34:07,320 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,321 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:34:07,360 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:34:07,656 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:34:07,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07 WrapperNode [2021-11-19 13:34:07,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:34:07,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:34:07,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:34:07,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:34:07,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:07,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:07,928 INFO L137 Inliner]: procedures = 713, calls = 2658, calls flagged for inlining = 59, calls inlined = 6, statements flattened = 899 [2021-11-19 13:34:07,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:34:07,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:34:07,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:34:07,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:34:07,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:07,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:07,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:07,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:08,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:08,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:08,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:08,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:34:08,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:34:08,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:34:08,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:34:08,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (1/1) ... [2021-11-19 13:34:08,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:34:08,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:34:08,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:34:08,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:34:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-11-19 13:34:08,294 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-11-19 13:34:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:34:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-11-19 13:34:08,294 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-11-19 13:34:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:34:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-19 13:34:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-19 13:34:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:34:08,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:34:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 13:34:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:34:08,296 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-11-19 13:34:08,296 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-11-19 13:34:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:34:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_impl [2021-11-19 13:34:08,297 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_impl [2021-11-19 13:34:08,297 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 13:34:08,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-11-19 13:34:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:34:08,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:34:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-11-19 13:34:08,298 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-11-19 13:34:08,298 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 13:34:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-11-19 13:34:08,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-11-19 13:34:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-19 13:34:08,299 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:34:08,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:34:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure my_memcpy [2021-11-19 13:34:08,300 INFO L138 BoogieDeclarations]: Found implementation of procedure my_memcpy [2021-11-19 13:34:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:34:08,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:34:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_write [2021-11-19 13:34:08,301 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_write [2021-11-19 13:34:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-19 13:34:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 13:34:08,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:34:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-11-19 13:34:08,302 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-11-19 13:34:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 13:34:08,302 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 13:34:08,302 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-11-19 13:34:08,303 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-11-19 13:34:08,303 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-11-19 13:34:08,303 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-11-19 13:34:08,763 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:34:08,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:34:15,580 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:34:15,599 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:34:15,599 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:34:15,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:34:15 BoogieIcfgContainer [2021-11-19 13:34:15,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:34:15,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:34:15,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:34:15,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:34:15,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:34:03" (1/3) ... [2021-11-19 13:34:15,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c9142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:34:15, skipping insertion in model container [2021-11-19 13:34:15,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:34:07" (2/3) ... [2021-11-19 13:34:15,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a5c9142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:34:15, skipping insertion in model container [2021-11-19 13:34:15,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:34:15" (3/3) ... [2021-11-19 13:34:15,619 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_write_from_whole_buffer_harness.i [2021-11-19 13:34:15,626 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:34:15,626 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:34:15,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:34:15,724 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:34:15,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:34:15,753 INFO L276 IsEmpty]: Start isEmpty. Operand has 175 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 107 states have internal predecessors, (128), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2021-11-19 13:34:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 13:34:15,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:15,780 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:34:15,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:15,786 INFO L85 PathProgramCache]: Analyzing trace with hash -170695640, now seen corresponding path program 1 times [2021-11-19 13:34:15,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:15,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998469174] [2021-11-19 13:34:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:15,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:15,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:15,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:15,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:34:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:17,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:34:17,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2021-11-19 13:34:17,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-19 13:34:17,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:17,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998469174] [2021-11-19 13:34:17,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998469174] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:17,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:17,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 13:34:17,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747561323] [2021-11-19 13:34:17,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:17,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:34:17,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:18,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:34:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:34:18,031 INFO L87 Difference]: Start difference. First operand has 175 states, 105 states have (on average 1.2190476190476192) internal successors, (128), 107 states have internal predecessors, (128), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) Second operand has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 13:34:18,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:18,087 INFO L93 Difference]: Finished difference Result 346 states and 501 transitions. [2021-11-19 13:34:18,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:34:18,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 156 [2021-11-19 13:34:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:18,103 INFO L225 Difference]: With dead ends: 346 [2021-11-19 13:34:18,103 INFO L226 Difference]: Without dead ends: 170 [2021-11-19 13:34:18,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:34:18,115 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:18,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:34:18,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-19 13:34:18,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-19 13:34:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 101 states have (on average 1.198019801980198) internal successors, (121), 103 states have internal predecessors, (121), 53 states have call successors, (53), 15 states have call predecessors, (53), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-19 13:34:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 226 transitions. [2021-11-19 13:34:18,188 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 226 transitions. Word has length 156 [2021-11-19 13:34:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:18,190 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 226 transitions. [2021-11-19 13:34:18,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-19 13:34:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 226 transitions. [2021-11-19 13:34:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 13:34:18,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:18,198 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:34:18,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 13:34:18,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:18,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:18,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:18,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1949598816, now seen corresponding path program 1 times [2021-11-19 13:34:18,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:18,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362861490] [2021-11-19 13:34:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:18,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:18,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:18,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:18,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:34:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:34:19,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-19 13:34:20,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-19 13:34:20,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:20,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362861490] [2021-11-19 13:34:20,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362861490] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:20,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:20,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 13:34:20,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578042770] [2021-11-19 13:34:20,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:20,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:20,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:20,951 INFO L87 Difference]: Start difference. First operand 170 states and 226 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:34:23,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:23,454 INFO L93 Difference]: Finished difference Result 336 states and 452 transitions. [2021-11-19 13:34:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:23,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 156 [2021-11-19 13:34:23,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:23,460 INFO L225 Difference]: With dead ends: 336 [2021-11-19 13:34:23,460 INFO L226 Difference]: Without dead ends: 173 [2021-11-19 13:34:23,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:23,463 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 25 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:23,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 609 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 13:34:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-19 13:34:23,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-11-19 13:34:23,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 103 states have (on average 1.1941747572815533) internal successors, (123), 106 states have internal predecessors, (123), 53 states have call successors, (53), 15 states have call predecessors, (53), 16 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2021-11-19 13:34:23,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 236 transitions. [2021-11-19 13:34:23,493 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 236 transitions. Word has length 156 [2021-11-19 13:34:23,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:23,494 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 236 transitions. [2021-11-19 13:34:23,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:34:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 236 transitions. [2021-11-19 13:34:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 13:34:23,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:23,500 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:34:23,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:23,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:23,726 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:23,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash -71903277, now seen corresponding path program 1 times [2021-11-19 13:34:23,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:23,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507546003] [2021-11-19 13:34:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:23,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:23,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:23,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:23,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:34:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1700 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:34:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-19 13:34:25,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-19 13:34:25,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:25,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507546003] [2021-11-19 13:34:25,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507546003] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:25,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:25,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-19 13:34:25,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972282232] [2021-11-19 13:34:25,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:25,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:34:25,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:25,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:34:25,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 13:34:25,958 INFO L87 Difference]: Start difference. First operand 173 states and 236 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:34:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:26,061 INFO L93 Difference]: Finished difference Result 349 states and 485 transitions. [2021-11-19 13:34:26,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 162 [2021-11-19 13:34:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:26,076 INFO L225 Difference]: With dead ends: 349 [2021-11-19 13:34:26,076 INFO L226 Difference]: Without dead ends: 183 [2021-11-19 13:34:26,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:34:26,080 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 29 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:26,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 659 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:34:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-19 13:34:26,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2021-11-19 13:34:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 105 states have (on average 1.1904761904761905) internal successors, (125), 108 states have internal predecessors, (125), 53 states have call successors, (53), 15 states have call predecessors, (53), 16 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2021-11-19 13:34:26,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 238 transitions. [2021-11-19 13:34:26,128 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 238 transitions. Word has length 162 [2021-11-19 13:34:26,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:26,129 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 238 transitions. [2021-11-19 13:34:26,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:34:26,129 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 238 transitions. [2021-11-19 13:34:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-19 13:34:26,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:26,136 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:34:26,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:26,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:26,362 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1018941163, now seen corresponding path program 1 times [2021-11-19 13:34:26,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:26,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983094225] [2021-11-19 13:34:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:26,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:26,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:26,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:26,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:34:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:34:27,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:27,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 13:34:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-19 13:34:29,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-19 13:34:31,263 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-19 13:34:31,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:31,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983094225] [2021-11-19 13:34:31,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983094225] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:31,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:31,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-19 13:34:31,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560564755] [2021-11-19 13:34:31,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:31,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:34:31,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:31,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:34:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:34:31,267 INFO L87 Difference]: Start difference. First operand 175 states and 238 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 13:34:33,396 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:35,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:36,155 INFO L93 Difference]: Finished difference Result 359 states and 484 transitions. [2021-11-19 13:34:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:34:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) Word has length 162 [2021-11-19 13:34:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:36,161 INFO L225 Difference]: With dead ends: 359 [2021-11-19 13:34:36,161 INFO L226 Difference]: Without dead ends: 184 [2021-11-19 13:34:36,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:36,164 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 34 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:36,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1237 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 2 Unknown, 44 Unchecked, 4.8s Time] [2021-11-19 13:34:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-19 13:34:36,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-11-19 13:34:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 110 states have (on average 1.2) internal successors, (132), 112 states have internal predecessors, (132), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2021-11-19 13:34:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 245 transitions. [2021-11-19 13:34:36,189 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 245 transitions. Word has length 162 [2021-11-19 13:34:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:36,190 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 245 transitions. [2021-11-19 13:34:36,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (28), 3 states have call predecessors, (28), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 13:34:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 245 transitions. [2021-11-19 13:34:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 13:34:36,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:36,194 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:34:36,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:36,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:36,409 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:36,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash 597836491, now seen corresponding path program 1 times [2021-11-19 13:34:36,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:36,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900827111] [2021-11-19 13:34:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:36,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:36,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:36,413 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:36,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:34:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1709 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:34:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-19 13:34:38,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2021-11-19 13:34:39,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:39,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900827111] [2021-11-19 13:34:39,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900827111] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:39,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:39,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-19 13:34:39,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418354792] [2021-11-19 13:34:39,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:39,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:34:39,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:39,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:34:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:34:39,762 INFO L87 Difference]: Start difference. First operand 180 states and 245 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:34:41,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:43,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:46,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:48,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:34:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:34:49,638 INFO L93 Difference]: Finished difference Result 368 states and 516 transitions. [2021-11-19 13:34:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:34:49,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 166 [2021-11-19 13:34:49,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:34:49,645 INFO L225 Difference]: With dead ends: 368 [2021-11-19 13:34:49,645 INFO L226 Difference]: Without dead ends: 200 [2021-11-19 13:34:49,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 324 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:34:49,647 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 42 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:34:49,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 806 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 4 Unknown, 50 Unchecked, 9.7s Time] [2021-11-19 13:34:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-19 13:34:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 189. [2021-11-19 13:34:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 119 states have (on average 1.2100840336134453) internal successors, (144), 121 states have internal predecessors, (144), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2021-11-19 13:34:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 257 transitions. [2021-11-19 13:34:49,671 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 257 transitions. Word has length 166 [2021-11-19 13:34:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:34:49,677 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 257 transitions. [2021-11-19 13:34:49,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 13:34:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 257 transitions. [2021-11-19 13:34:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 13:34:49,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:34:49,697 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:34:49,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:34:49,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:34:49,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:34:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:34:49,922 INFO L85 PathProgramCache]: Analyzing trace with hash -108760115, now seen corresponding path program 1 times [2021-11-19 13:34:49,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:34:49,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244863724] [2021-11-19 13:34:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:34:49,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:34:49,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:34:49,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:34:49,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:34:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:34:51,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 13:34:51,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:34:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-19 13:34:53,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:34:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 13:34:56,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:34:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244863724] [2021-11-19 13:34:56,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244863724] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:34:56,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:34:56,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 13:34:56,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839477927] [2021-11-19 13:34:56,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:34:56,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:34:56,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:34:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:34:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:34:56,023 INFO L87 Difference]: Start difference. First operand 189 states and 257 transitions. Second operand has 12 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:34:58,129 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:00,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:05,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:07,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:08,776 INFO L93 Difference]: Finished difference Result 376 states and 532 transitions. [2021-11-19 13:35:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:35:08,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 166 [2021-11-19 13:35:08,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:08,783 INFO L225 Difference]: With dead ends: 376 [2021-11-19 13:35:08,783 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 13:35:08,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 312 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:35:08,786 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 38 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2088 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:08,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2088 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 4 Unknown, 384 Unchecked, 10.9s Time] [2021-11-19 13:35:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 13:35:08,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2021-11-19 13:35:08,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 123 states have internal predecessors, (144), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2021-11-19 13:35:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-11-19 13:35:08,812 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 166 [2021-11-19 13:35:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:08,812 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-11-19 13:35:08,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:35:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-11-19 13:35:08,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 13:35:08,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:08,817 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:35:08,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:09,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:09,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1272996617, now seen corresponding path program 1 times [2021-11-19 13:35:09,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:09,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165318893] [2021-11-19 13:35:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:09,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:09,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:09,041 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:09,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:35:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:10,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1707 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:35:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-19 13:35:10,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 13:35:11,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:11,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165318893] [2021-11-19 13:35:11,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165318893] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:11,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:11,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 13:35:11,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824516478] [2021-11-19 13:35:11,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:11,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:35:11,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:11,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:35:11,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:35:11,564 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:35:12,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:12,186 INFO L93 Difference]: Finished difference Result 380 states and 522 transitions. [2021-11-19 13:35:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:35:12,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 166 [2021-11-19 13:35:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:12,190 INFO L225 Difference]: With dead ends: 380 [2021-11-19 13:35:12,190 INFO L226 Difference]: Without dead ends: 201 [2021-11-19 13:35:12,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:35:12,193 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 12 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:12,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1613 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:35:12,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-19 13:35:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2021-11-19 13:35:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 121 states have (on average 1.1900826446280992) internal successors, (144), 123 states have internal predecessors, (144), 53 states have call successors, (53), 16 states have call predecessors, (53), 16 states have return successors, (60), 52 states have call predecessors, (60), 52 states have call successors, (60) [2021-11-19 13:35:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 257 transitions. [2021-11-19 13:35:12,225 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 257 transitions. Word has length 166 [2021-11-19 13:35:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:12,226 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 257 transitions. [2021-11-19 13:35:12,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-19 13:35:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 257 transitions. [2021-11-19 13:35:12,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 13:35:12,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:12,233 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:35:12,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:12,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:12,457 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash -264674876, now seen corresponding path program 1 times [2021-11-19 13:35:12,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:12,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792644113] [2021-11-19 13:35:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:12,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:12,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:12,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:12,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:35:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1711 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:35:13,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-19 13:35:14,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-19 13:35:14,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:14,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792644113] [2021-11-19 13:35:14,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792644113] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:14,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:14,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 13:35:14,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790912320] [2021-11-19 13:35:14,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:14,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:35:14,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:35:14,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:35:14,939 INFO L87 Difference]: Start difference. First operand 191 states and 257 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:35:17,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:17,229 INFO L93 Difference]: Finished difference Result 342 states and 470 transitions. [2021-11-19 13:35:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:35:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 168 [2021-11-19 13:35:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:17,233 INFO L225 Difference]: With dead ends: 342 [2021-11-19 13:35:17,234 INFO L226 Difference]: Without dead ends: 194 [2021-11-19 13:35:17,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:35:17,236 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 23 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:17,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 617 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 13:35:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-19 13:35:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-19 13:35:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 126 states have internal predecessors, (146), 53 states have call successors, (53), 16 states have call predecessors, (53), 17 states have return successors, (67), 52 states have call predecessors, (67), 52 states have call successors, (67) [2021-11-19 13:35:17,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 266 transitions. [2021-11-19 13:35:17,256 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 266 transitions. Word has length 168 [2021-11-19 13:35:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:17,256 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 266 transitions. [2021-11-19 13:35:17,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:35:17,257 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 266 transitions. [2021-11-19 13:35:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 13:35:17,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:17,260 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:35:17,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:17,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:17,473 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:17,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:17,474 INFO L85 PathProgramCache]: Analyzing trace with hash -560305425, now seen corresponding path program 1 times [2021-11-19 13:35:17,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:17,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415646939] [2021-11-19 13:35:17,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:17,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:17,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:17,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:17,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:35:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:18,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 13:35:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:19,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-19 13:35:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-19 13:35:20,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:21,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2021-11-19 13:35:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-19 13:35:21,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:21,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415646939] [2021-11-19 13:35:21,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415646939] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:21,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:21,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11] total 18 [2021-11-19 13:35:21,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189515288] [2021-11-19 13:35:21,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:21,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 13:35:21,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 13:35:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:35:21,932 INFO L87 Difference]: Start difference. First operand 194 states and 266 transitions. Second operand has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-19 13:35:24,094 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:26,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:28,848 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:30,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:31,219 INFO L93 Difference]: Finished difference Result 389 states and 528 transitions. [2021-11-19 13:35:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 13:35:31,221 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 174 [2021-11-19 13:35:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:31,224 INFO L225 Difference]: With dead ends: 389 [2021-11-19 13:35:31,224 INFO L226 Difference]: Without dead ends: 227 [2021-11-19 13:35:31,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-19 13:35:31,227 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 29 mSDsluCounter, 1917 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2153 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:31,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 2153 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 4 Unknown, 125 Unchecked, 8.9s Time] [2021-11-19 13:35:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-19 13:35:31,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 215. [2021-11-19 13:35:31,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 144 states have (on average 1.2013888888888888) internal successors, (173), 146 states have internal predecessors, (173), 53 states have call successors, (53), 17 states have call predecessors, (53), 17 states have return successors, (59), 52 states have call predecessors, (59), 52 states have call successors, (59) [2021-11-19 13:35:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 285 transitions. [2021-11-19 13:35:31,244 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 285 transitions. Word has length 174 [2021-11-19 13:35:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:31,245 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 285 transitions. [2021-11-19 13:35:31,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.333333333333333) internal successors, (76), 10 states have internal predecessors, (76), 5 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2021-11-19 13:35:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 285 transitions. [2021-11-19 13:35:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-19 13:35:31,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:31,248 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:35:31,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:31,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:31,473 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:31,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:31,474 INFO L85 PathProgramCache]: Analyzing trace with hash 316577719, now seen corresponding path program 1 times [2021-11-19 13:35:31,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:31,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849696616] [2021-11-19 13:35:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:31,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:31,476 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:31,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:35:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:32,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1727 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 13:35:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-19 13:35:35,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-11-19 13:35:37,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:37,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849696616] [2021-11-19 13:35:37,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849696616] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:37,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:37,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 19 [2021-11-19 13:35:37,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280193309] [2021-11-19 13:35:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:37,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 13:35:37,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 13:35:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-19 13:35:37,739 INFO L87 Difference]: Start difference. First operand 215 states and 285 transitions. Second operand has 12 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:35:39,855 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:41,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, RoundingMode, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:47,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:49,055 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:35:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:50,422 INFO L93 Difference]: Finished difference Result 378 states and 515 transitions. [2021-11-19 13:35:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 13:35:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 178 [2021-11-19 13:35:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:50,433 INFO L225 Difference]: With dead ends: 378 [2021-11-19 13:35:50,433 INFO L226 Difference]: Without dead ends: 218 [2021-11-19 13:35:50,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-19 13:35:50,436 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 38 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:50,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 2083 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 280 Invalid, 4 Unknown, 373 Unchecked, 10.7s Time] [2021-11-19 13:35:50,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-19 13:35:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 208. [2021-11-19 13:35:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 137 states have (on average 1.197080291970803) internal successors, (164), 139 states have internal predecessors, (164), 53 states have call successors, (53), 17 states have call predecessors, (53), 17 states have return successors, (59), 52 states have call predecessors, (59), 52 states have call successors, (59) [2021-11-19 13:35:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 276 transitions. [2021-11-19 13:35:50,455 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 276 transitions. Word has length 178 [2021-11-19 13:35:50,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:50,455 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 276 transitions. [2021-11-19 13:35:50,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.818181818181818) internal successors, (75), 11 states have internal predecessors, (75), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:35:50,456 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 276 transitions. [2021-11-19 13:35:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-19 13:35:50,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:50,458 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:35:50,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-19 13:35:50,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:50,674 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:50,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1836456453, now seen corresponding path program 1 times [2021-11-19 13:35:50,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:50,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661928771] [2021-11-19 13:35:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:35:50,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:50,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:50,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:35:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:35:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 13:35:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:35:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-19 13:35:52,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:35:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-11-19 13:35:53,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:35:53,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661928771] [2021-11-19 13:35:53,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661928771] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:35:53,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:35:53,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2021-11-19 13:35:53,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419465718] [2021-11-19 13:35:53,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:35:53,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 13:35:53,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:53,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 13:35:53,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:35:53,020 INFO L87 Difference]: Start difference. First operand 208 states and 276 transitions. Second operand has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:35:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:35:53,558 INFO L93 Difference]: Finished difference Result 366 states and 495 transitions. [2021-11-19 13:35:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 13:35:53,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 178 [2021-11-19 13:35:53,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:35:53,564 INFO L225 Difference]: With dead ends: 366 [2021-11-19 13:35:53,564 INFO L226 Difference]: Without dead ends: 213 [2021-11-19 13:35:53,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:35:53,567 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 12 mSDsluCounter, 1412 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:35:53,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1621 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 13:35:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-19 13:35:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 208. [2021-11-19 13:35:53,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 139 states have internal predecessors, (163), 53 states have call successors, (53), 17 states have call predecessors, (53), 17 states have return successors, (59), 52 states have call predecessors, (59), 52 states have call successors, (59) [2021-11-19 13:35:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 275 transitions. [2021-11-19 13:35:53,602 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 275 transitions. Word has length 178 [2021-11-19 13:35:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:35:53,603 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 275 transitions. [2021-11-19 13:35:53,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:35:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 275 transitions. [2021-11-19 13:35:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 13:35:53,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:35:53,606 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:35:53,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:35:53,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:35:53,821 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:35:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:35:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1421332384, now seen corresponding path program 2 times [2021-11-19 13:35:53,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:35:53,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971644516] [2021-11-19 13:35:53,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:35:53,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:35:53,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:35:53,827 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:35:53,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:36:04,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:04,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:04,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1732 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:04,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-19 13:36:04,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-19 13:36:05,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:05,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971644516] [2021-11-19 13:36:05,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1971644516] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:05,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:05,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-19 13:36:05,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553958290] [2021-11-19 13:36:05,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:05,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 13:36:05,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:05,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 13:36:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:05,635 INFO L87 Difference]: Start difference. First operand 208 states and 275 transitions. Second operand has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:36:07,785 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:36:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:08,025 INFO L93 Difference]: Finished difference Result 345 states and 467 transitions. [2021-11-19 13:36:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 13:36:08,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) Word has length 180 [2021-11-19 13:36:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:08,032 INFO L225 Difference]: With dead ends: 345 [2021-11-19 13:36:08,032 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 13:36:08,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:36:08,035 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 42 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:08,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 801 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-19 13:36:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 13:36:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-19 13:36:08,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 142 states have internal predecessors, (165), 53 states have call successors, (53), 17 states have call predecessors, (53), 18 states have return successors, (65), 52 states have call predecessors, (65), 52 states have call successors, (65) [2021-11-19 13:36:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 283 transitions. [2021-11-19 13:36:08,061 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 283 transitions. Word has length 180 [2021-11-19 13:36:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:08,062 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 283 transitions. [2021-11-19 13:36:08,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.6) internal successors, (63), 6 states have internal predecessors, (63), 4 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:36:08,062 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 283 transitions. [2021-11-19 13:36:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-19 13:36:08,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:08,066 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:36:08,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:08,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:08,290 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1911044341, now seen corresponding path program 2 times [2021-11-19 13:36:08,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:08,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104151533] [2021-11-19 13:36:08,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 13:36:08,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:08,293 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:08,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:36:19,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 13:36:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:19,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:36:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-19 13:36:19,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-19 13:36:20,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:20,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104151533] [2021-11-19 13:36:20,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104151533] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:36:20,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:36:20,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-19 13:36:20,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096633079] [2021-11-19 13:36:20,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:20,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:36:20,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:20,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:36:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:36:20,236 INFO L87 Difference]: Start difference. First operand 211 states and 283 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:36:20,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:20,369 INFO L93 Difference]: Finished difference Result 345 states and 467 transitions. [2021-11-19 13:36:20,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:36:20,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 186 [2021-11-19 13:36:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:20,372 INFO L225 Difference]: With dead ends: 345 [2021-11-19 13:36:20,372 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 13:36:20,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:36:20,374 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 22 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:20,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 636 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:36:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 13:36:20,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-19 13:36:20,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 142 states have internal predecessors, (165), 53 states have call successors, (53), 17 states have call predecessors, (53), 18 states have return successors, (64), 52 states have call predecessors, (64), 52 states have call successors, (64) [2021-11-19 13:36:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 282 transitions. [2021-11-19 13:36:20,391 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 282 transitions. Word has length 186 [2021-11-19 13:36:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 282 transitions. [2021-11-19 13:36:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:36:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 282 transitions. [2021-11-19 13:36:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 13:36:20,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:20,395 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:36:20,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:20,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:20,610 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash -619213770, now seen corresponding path program 3 times [2021-11-19 13:36:20,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:20,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381516432] [2021-11-19 13:36:20,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:36:20,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:20,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:20,614 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:20,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:36:30,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 13:36:30,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:36:30,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 13:36:31,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-19 13:36:32,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 56 proven. 7 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-19 13:36:33,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:33,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381516432] [2021-11-19 13:36:33,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381516432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:33,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [298724279] [2021-11-19 13:36:33,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 13:36:33,369 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:33,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:33,373 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:33,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-19 13:37:42,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 13:37:42,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1426 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 13:37:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-19 13:37:43,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-19 13:37:44,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [298724279] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:37:44,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 13:37:44,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 10, 7] total 17 [2021-11-19 13:37:44,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439890227] [2021-11-19 13:37:44,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:37:44,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:37:44,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:37:44,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:37:44,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-19 13:37:44,192 INFO L87 Difference]: Start difference. First operand 211 states and 282 transitions. Second operand has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:37:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:37:44,530 INFO L93 Difference]: Finished difference Result 340 states and 457 transitions. [2021-11-19 13:37:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:37:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 192 [2021-11-19 13:37:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:37:44,534 INFO L225 Difference]: With dead ends: 340 [2021-11-19 13:37:44,534 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 13:37:44,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 749 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:37:44,536 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 2 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1232 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:37:44,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1232 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:37:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 13:37:44,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-19 13:37:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 142 states have internal predecessors, (165), 53 states have call successors, (53), 17 states have call predecessors, (53), 18 states have return successors, (63), 52 states have call predecessors, (63), 52 states have call successors, (63) [2021-11-19 13:37:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 281 transitions. [2021-11-19 13:37:44,552 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 281 transitions. Word has length 192 [2021-11-19 13:37:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:37:44,553 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 281 transitions. [2021-11-19 13:37:44,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 13:37:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 281 transitions. [2021-11-19 13:37:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-19 13:37:44,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:37:44,557 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:37:44,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:44,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:37:44,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:37:44,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:37:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:37:44,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1180055391, now seen corresponding path program 4 times [2021-11-19 13:37:44,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:37:44,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043306207] [2021-11-19 13:37:44,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:37:44,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:37:44,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:37:44,977 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:37:44,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:37:46,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:37:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:37:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 13:37:46,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:53,890 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 13:37:53,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 304 treesize of output 112 [2021-11-19 13:37:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 197 proven. 20 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 13:37:54,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:00,844 INFO L354 Elim1Store]: treesize reduction 1572, result has 0.1 percent of original size [2021-11-19 13:38:00,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 193 treesize of output 1 [2021-11-19 13:38:33,962 WARN L227 SmtUtils]: Spent 29.28s on a formula simplification. DAG size of input: 1166 DAG size of output: 314 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:38:33,967 INFO L354 Elim1Store]: treesize reduction 2882, result has 23.2 percent of original size [2021-11-19 13:38:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 193 treesize of output 923 [2021-11-19 13:43:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-19 13:43:19,034 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:43:19,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043306207] [2021-11-19 13:43:19,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043306207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:43:19,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418606445] [2021-11-19 13:43:19,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 13:43:19,034 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:43:19,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:43:19,036 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:43:19,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-19 13:43:19,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 13:43:19,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 13:43:19,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:43:19,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-19 13:43:21,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-19 13:43:22,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [418606445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:43:22,162 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 13:43:22,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [19, 16] total 38 [2021-11-19 13:43:22,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756527791] [2021-11-19 13:43:22,162 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:43:22,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:43:22,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:43:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:43:22,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 13:43:22,164 INFO L87 Difference]: Start difference. First operand 211 states and 281 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:43:24,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:43:24,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:43:24,883 INFO L93 Difference]: Finished difference Result 315 states and 417 transitions. [2021-11-19 13:43:24,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:43:24,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) Word has length 198 [2021-11-19 13:43:24,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:43:24,886 INFO L225 Difference]: With dead ends: 315 [2021-11-19 13:43:24,886 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 13:43:24,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 742 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=139, Invalid=1343, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 13:43:24,888 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 57 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:43:24,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1383 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-19 13:43:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 13:43:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-19 13:43:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 142 states have internal predecessors, (165), 53 states have call successors, (53), 17 states have call predecessors, (53), 18 states have return successors, (61), 52 states have call predecessors, (61), 52 states have call successors, (61) [2021-11-19 13:43:24,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 279 transitions. [2021-11-19 13:43:24,900 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 279 transitions. Word has length 198 [2021-11-19 13:43:24,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:43:24,901 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 279 transitions. [2021-11-19 13:43:24,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 5 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 13:43:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 279 transitions. [2021-11-19 13:43:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-19 13:43:24,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:43:24,904 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-19 13:43:24,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:25,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:43:25,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:43:25,314 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:43:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:43:25,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1174350860, now seen corresponding path program 1 times [2021-11-19 13:43:25,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:43:25,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099300571] [2021-11-19 13:43:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:43:25,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:43:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:43:25,317 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:43:25,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d59c1c1-121a-4904-ac0a-27ce324fbbbf/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:43:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:43:26,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 13:43:26,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:43:33,335 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-11-19 13:43:33,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 304 treesize of output 112 [2021-11-19 13:43:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 227 proven. 20 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-19 13:43:33,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:43:39,279 INFO L354 Elim1Store]: treesize reduction 1572, result has 0.1 percent of original size [2021-11-19 13:43:39,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 193 treesize of output 1 [2021-11-19 13:44:06,024 WARN L227 SmtUtils]: Spent 22.40s on a formula simplification. DAG size of input: 1166 DAG size of output: 314 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:44:06,027 INFO L354 Elim1Store]: treesize reduction 2882, result has 23.2 percent of original size [2021-11-19 13:44:06,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 193 treesize of output 923