./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:34:44,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:34:44,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:34:44,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:34:44,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:34:44,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:34:44,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:34:44,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:34:44,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:34:44,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:34:44,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:34:44,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:34:44,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:34:44,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:34:44,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:34:44,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:34:44,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:34:44,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:34:44,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:34:44,583 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:34:44,586 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:34:44,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:34:44,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:34:44,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:34:44,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:34:44,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:34:44,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:34:44,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:34:44,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:34:44,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:34:44,602 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:34:44,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:34:44,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:34:44,607 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:34:44,615 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:34:44,616 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:34:44,617 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:34:44,620 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:34:44,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:34:44,622 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:34:44,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:34:44,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:34:44,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:34:44,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:34:44,681 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:34:44,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:34:44,682 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:34:44,682 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:34:44,682 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:34:44,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:34:44,683 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:34:44,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:34:44,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:34:44,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:34:44,685 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:34:44,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:34:44,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:34:44,686 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:34:44,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:34:44,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:34:44,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:34:44,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:34:44,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:34:44,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:34:44,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:34:44,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:34:44,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:34:44,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:34:44,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:34:44,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:34:44,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:44,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:34:44,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:34:44,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:34:44,695 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:34:44,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:34:44,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:34:44,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:34:44,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:34:44,696 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_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e [2021-11-13 01:34:45,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:34:45,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:34:45,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:34:45,076 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:34:45,077 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:34:45,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-13 01:34:45,181 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/09a1c44fc/ff2ef93be47d48ea96115d005e7c1041/FLAG13b610ba9 [2021-11-13 01:34:46,114 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:34:46,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-13 01:34:46,168 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/09a1c44fc/ff2ef93be47d48ea96115d005e7c1041/FLAG13b610ba9 [2021-11-13 01:34:46,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/09a1c44fc/ff2ef93be47d48ea96115d005e7c1041 [2021-11-13 01:34:46,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:34:46,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:34:46,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:46,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:34:46,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:34:46,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:46" (1/1) ... [2021-11-13 01:34:46,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e341dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:46, skipping insertion in model container [2021-11-13 01:34:46,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:46" (1/1) ... [2021-11-13 01:34:46,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:34:46,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:47,164 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-13 01:34:47,172 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-13 01:34:47,199 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:34:47,206 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:34:48,348 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,349 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,350 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,352 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,353 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,373 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,374 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,377 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,378 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,390 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,392 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,393 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,393 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:48,927 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:34:48,928 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:34:48,930 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:34:48,931 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:34:48,933 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:34:48,934 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:34:48,935 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:34:48,936 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:34:48,936 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:34:48,937 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:34:49,124 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:34:49,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:49,174 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:34:49,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c70bb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:49, skipping insertion in model container [2021-11-13 01:34:49,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:49,176 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:34:49,178 INFO L158 Benchmark]: Toolchain (without parser) took 2568.35ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 72.3MB in the beginning and 78.2MB in the end (delta: -5.9MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2021-11-13 01:34:49,179 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 111.1MB. Free memory was 66.1MB in the beginning and 66.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:34:49,181 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2564.98ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 72.0MB in the beginning and 78.2MB in the end (delta: -6.1MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. [2021-11-13 01:34:49,183 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 111.1MB. Free memory was 66.1MB in the beginning and 66.0MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2564.98ms. Allocated memory was 111.1MB in the beginning and 136.3MB in the end (delta: 25.2MB). Free memory was 72.0MB in the beginning and 78.2MB in the end (delta: -6.1MB). Peak memory consumption was 20.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7039]: 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_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:34:52,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:34:52,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:34:52,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:34:52,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:34:52,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:34:52,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:34:52,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:34:52,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:34:52,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:34:52,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:34:52,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:34:52,162 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:34:52,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:34:52,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:34:52,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:34:52,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:34:52,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:34:52,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:34:52,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:34:52,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:34:52,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:34:52,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:34:52,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:34:52,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:34:52,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:34:52,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:34:52,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:34:52,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:34:52,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:34:52,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:34:52,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:34:52,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:34:52,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:34:52,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:34:52,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:34:52,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:34:52,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:34:52,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:34:52,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:34:52,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:34:52,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:34:52,279 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:34:52,281 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:34:52,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:34:52,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:34:52,283 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:34:52,283 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:34:52,284 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:34:52,284 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:34:52,284 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:34:52,285 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:34:52,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:34:52,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:34:52,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:34:52,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:34:52,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:34:52,289 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:34:52,290 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:34:52,290 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:34:52,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:34:52,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:34:52,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:34:52,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:34:52,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:34:52,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:34:52,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:52,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:34:52,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:34:52,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:34:52,294 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:34:52,294 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:34:52,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:34:52,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:34:52,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:34:52,295 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_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb1e95e9d6379d31cbb3e207d6fe85ddf495edebf9b764e927537f63dbf829e [2021-11-13 01:34:52,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:34:52,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:34:52,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:34:52,832 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:34:52,833 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:34:52,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-13 01:34:52,922 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/a3a5a90ef/bce658cef8424fee92c6810a0fdd369c/FLAGd9a95ccf8 [2021-11-13 01:34:53,863 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:34:53,864 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i [2021-11-13 01:34:53,931 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/a3a5a90ef/bce658cef8424fee92c6810a0fdd369c/FLAGd9a95ccf8 [2021-11-13 01:34:54,331 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/data/a3a5a90ef/bce658cef8424fee92c6810a0fdd369c [2021-11-13 01:34:54,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:34:54,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:34:54,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:54,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:34:54,349 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:34:54,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:54" (1/1) ... [2021-11-13 01:34:54,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2566a532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:54, skipping insertion in model container [2021-11-13 01:34:54,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:34:54" (1/1) ... [2021-11-13 01:34:54,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:34:54,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:54,986 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-13 01:34:54,994 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-13 01:34:55,017 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:34:55,023 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:34:56,107 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,108 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,109 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,110 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,112 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,134 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,135 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,138 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,139 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,142 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,144 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,145 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,146 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:56,660 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:34:56,662 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:34:56,664 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:34:56,666 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:34:56,669 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:34:56,670 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:34:56,671 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:34:56,672 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:34:56,674 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:34:56,675 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:34:56,990 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:34:57,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:57,104 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:34:57,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:34:57,165 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-13 01:34:57,169 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-13 01:34:57,171 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:34:57,172 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:34:57,273 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,278 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,278 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,279 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,288 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,302 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,302 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,305 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,307 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,313 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,314 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,315 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,319 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,391 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:34:57,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:34:57,393 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:34:57,395 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:34:57,402 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:34:57,403 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:34:57,404 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:34:57,405 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:34:57,406 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:34:57,406 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:34:57,443 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:34:57,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:57,483 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:34:57,500 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4494,4507] [2021-11-13 01:34:57,501 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/sv-benchmarks/c/aws-c-common/aws_linked_list_next_harness.i[4554,4567] [2021-11-13 01:34:57,503 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:34:57,504 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:34:57,579 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,579 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,580 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,581 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,581 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,589 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,590 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,590 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,591 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,592 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,593 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,594 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,594 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:34:57,636 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:34:57,637 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:34:57,638 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:34:57,639 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:34:57,640 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:34:57,641 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:34:57,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:34:57,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:34:57,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:34:57,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:34:57,670 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:34:57,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:34:57,943 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:34:57,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57 WrapperNode [2021-11-13 01:34:57,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:34:57,945 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:57,945 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:34:57,945 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:34:57,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:34:58,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:34:58,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:34:58,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:34:58,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:34:58,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:34:58,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:34:58,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:34:58,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (1/1) ... [2021-11-13 01:34:58,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:34:58,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:34:58,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:34:58,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:34:58,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:34:58,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:34:58,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:34:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:34:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-13 01:34:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-13 01:34:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:34:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:34:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:34:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 01:34:58,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 01:34:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:34:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:34:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:34:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-13 01:34:58,370 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-13 01:34:59,100 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:34:59,100 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 01:34:59,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:59 BoogieIcfgContainer [2021-11-13 01:34:59,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:34:59,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:34:59,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:34:59,109 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:34:59,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:34:54" (1/3) ... [2021-11-13 01:34:59,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bf52a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:59, skipping insertion in model container [2021-11-13 01:34:59,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:34:57" (2/3) ... [2021-11-13 01:34:59,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bf52a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:34:59, skipping insertion in model container [2021-11-13 01:34:59,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:34:59" (3/3) ... [2021-11-13 01:34:59,113 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_next_harness.i [2021-11-13 01:34:59,120 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:34:59,120 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:34:59,181 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:34:59,189 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:34:59,189 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:34:59,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 01:34:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 01:34:59,216 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:34:59,217 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:34:59,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:34:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:34:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 829036907, now seen corresponding path program 1 times [2021-11-13 01:34:59,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:34:59,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186056793] [2021-11-13 01:34:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:34:59,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:34:59,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:34:59,252 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:34:59,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:34:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:34:59,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:34:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:34:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:34:59,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:34:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:34:59,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:34:59,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186056793] [2021-11-13 01:34:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186056793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:34:59,893 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:34:59,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 01:34:59,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106070409] [2021-11-13 01:34:59,897 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:34:59,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:34:59,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:34:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:34:59,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:34:59,952 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 01:35:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:35:00,006 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2021-11-13 01:35:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:35:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-11-13 01:35:00,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:35:00,025 INFO L225 Difference]: With dead ends: 94 [2021-11-13 01:35:00,025 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 01:35:00,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:35:00,034 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:35:00,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:35:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 01:35:00,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-13 01:35:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 29 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 01:35:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-13 01:35:00,089 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2021-11-13 01:35:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:35:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-13 01:35:00,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 01:35:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-13 01:35:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 01:35:00,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:35:00,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:35:00,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-13 01:35:00,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:35:00,314 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:35:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:35:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -192031447, now seen corresponding path program 1 times [2021-11-13 01:35:00,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:35:00,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [41242117] [2021-11-13 01:35:00,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:35:00,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:35:00,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:35:00,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:35:00,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:35:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:35:00,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 01:35:00,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:35:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:35:04,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:35:19,982 WARN L227 SmtUtils]: Spent 11.06s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:35:44,995 WARN L227 SmtUtils]: Spent 11.67s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:35:52,820 WARN L227 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:35:52,823 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-13 01:35:52,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-13 01:35:54,533 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-13 01:35:54,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-13 01:35:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:35:59,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:35:59,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [41242117] [2021-11-13 01:35:59,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [41242117] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:35:59,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:35:59,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 29 [2021-11-13 01:35:59,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655717565] [2021-11-13 01:35:59,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:35:59,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 01:35:59,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:35:59,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 01:35:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=724, Unknown=3, NotChecked=0, Total=812 [2021-11-13 01:35:59,872 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 01:36:03,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:03,048 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-13 01:36:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 01:36:03,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-11-13 01:36:03,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:03,054 INFO L225 Difference]: With dead ends: 84 [2021-11-13 01:36:03,054 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 01:36:03,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=105, Invalid=884, Unknown=3, NotChecked=0, Total=992 [2021-11-13 01:36:03,056 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 29 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2060.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 2179.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:03,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 856 Invalid, 306 Unknown, 0 Unchecked, 15.60ms Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 92 Unchecked, 2179.53ms Time] [2021-11-13 01:36:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 01:36:03,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-11-13 01:36:03,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 45 states have internal predecessors, (49), 15 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-13 01:36:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-13 01:36:03,079 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 28 [2021-11-13 01:36:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:03,080 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-13 01:36:03,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 01:36:03,081 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-13 01:36:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 01:36:03,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:03,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:03,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-13 01:36:03,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:03,284 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1001378073, now seen corresponding path program 1 times [2021-11-13 01:36:03,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:03,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603979269] [2021-11-13 01:36:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:03,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:03,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:03,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:36:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 01:36:03,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:08,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:12,148 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 01:36:12,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-13 01:36:12,185 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:36:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-13 01:36:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:36:12,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:12,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603979269] [2021-11-13 01:36:12,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603979269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:12,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1241916239] [2021-11-13 01:36:12,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:12,230 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:36:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:36:12,237 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:36:12,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-13 01:36:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:36:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:18,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:20,798 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 01:36:20,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-13 01:36:20,832 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:36:20,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-13 01:36:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:36:20,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1241916239] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:20,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757667410] [2021-11-13 01:36:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:20,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:20,899 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:20,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 01:36:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 01:36:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:22,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:25,389 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 01:36:25,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-13 01:36:25,442 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:36:25,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-13 01:36:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:36:25,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757667410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:25,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:36:25,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13, 11, 12, 11] total 25 [2021-11-13 01:36:25,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028639908] [2021-11-13 01:36:25,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:25,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 01:36:25,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 01:36:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:36:25,489 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 25 states have internal predecessors, (44), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:36:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:33,679 INFO L93 Difference]: Finished difference Result 146 states and 181 transitions. [2021-11-13 01:36:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 01:36:33,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 25 states have internal predecessors, (44), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 28 [2021-11-13 01:36:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:33,684 INFO L225 Difference]: With dead ends: 146 [2021-11-13 01:36:33,684 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 01:36:33,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 01:36:33,688 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 70 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1422.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.24ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1499.76ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:33,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 503 Invalid, 280 Unknown, 0 Unchecked, 6.24ms Time], IncrementalHoareTripleChecker [25 Valid, 155 Invalid, 0 Unknown, 100 Unchecked, 1499.76ms Time] [2021-11-13 01:36:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 01:36:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-11-13 01:36:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 15 states have call successors, (15), 8 states have call predecessors, (15), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2021-11-13 01:36:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2021-11-13 01:36:33,707 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 28 [2021-11-13 01:36:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:33,708 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2021-11-13 01:36:33,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 25 states have internal predecessors, (44), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:36:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2021-11-13 01:36:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 01:36:33,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:33,711 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:33,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:33,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-13 01:36:34,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:34,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:34,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1394405083, now seen corresponding path program 1 times [2021-11-13 01:36:34,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:34,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025550907] [2021-11-13 01:36:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:34,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:34,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:34,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:34,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:36:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:36:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:36:34,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:36:35,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:36:35,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025550907] [2021-11-13 01:36:35,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025550907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:35,573 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:35,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 01:36:35,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21300948] [2021-11-13 01:36:35,573 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:35,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:35,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:36:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:35,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:35,575 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:36:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:35,807 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2021-11-13 01:36:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-13 01:36:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:35,810 INFO L225 Difference]: With dead ends: 158 [2021-11-13 01:36:35,810 INFO L226 Difference]: Without dead ends: 71 [2021-11-13 01:36:35,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:35,812 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 207.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:35,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 189 Invalid, 25 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 215.59ms Time] [2021-11-13 01:36:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-13 01:36:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-11-13 01:36:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 12 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 01:36:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-11-13 01:36:35,827 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 28 [2021-11-13 01:36:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:35,827 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-11-13 01:36:35,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 01:36:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-11-13 01:36:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:36:35,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:35,830 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:36:35,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:36,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:36:36,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:36:36,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 854159971, now seen corresponding path program 1 times [2021-11-13 01:36:36,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:36:36,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815525589] [2021-11-13 01:36:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:36,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:36:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:36:36,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:36:36,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:36:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:36,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 01:36:36,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:47,245 INFO L354 Elim1Store]: treesize reduction 192, result has 28.1 percent of original size [2021-11-13 01:36:47,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 237 treesize of output 189 [2021-11-13 01:36:48,351 INFO L354 Elim1Store]: treesize reduction 47, result has 59.8 percent of original size [2021-11-13 01:36:48,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 157 [2021-11-13 01:36:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:49,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:49,662 WARN L227 SmtUtils]: Spent 10.95s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:37:49,663 INFO L354 Elim1Store]: treesize reduction 25, result has 84.3 percent of original size [2021-11-13 01:37:49,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 203 [2021-11-13 01:37:53,258 INFO L354 Elim1Store]: treesize reduction 23, result has 79.3 percent of original size [2021-11-13 01:37:53,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 220 [2021-11-13 01:38:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:38:31,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:38:31,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815525589] [2021-11-13 01:38:31,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815525589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:38:31,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2120825517] [2021-11-13 01:38:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:38:31,673 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:38:31,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:38:31,675 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:38:31,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-13 01:38:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:38:31,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 01:38:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:08,387 INFO L354 Elim1Store]: treesize reduction 97, result has 41.2 percent of original size [2021-11-13 01:39:08,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 237 treesize of output 182 [2021-11-13 01:39:09,967 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-13 01:39:09,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 143 treesize of output 137 [2021-11-13 01:39:10,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:39:10,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:39:19,209 INFO L354 Elim1Store]: treesize reduction 45, result has 2.2 percent of original size [2021-11-13 01:39:19,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 1 [2021-11-13 01:39:30,522 WARN L227 SmtUtils]: Spent 10.90s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:39:30,523 INFO L354 Elim1Store]: treesize reduction 25, result has 84.3 percent of original size [2021-11-13 01:39:30,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 203 [2021-11-13 01:39:33,771 INFO L354 Elim1Store]: treesize reduction 23, result has 79.3 percent of original size [2021-11-13 01:39:33,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 213 treesize of output 220 [2021-11-13 01:39:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:39:47,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2120825517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:39:47,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706400824] [2021-11-13 01:39:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:39:47,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:39:47,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:39:47,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:39:47,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 01:39:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:39:47,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 01:39:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:39:47,851 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 01:39:47,851 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 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-13 01:39:48,085 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 01:39:48,086 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 1 case distinctions, treesize of input 51 treesize of output 38 [2021-11-13 01:39:48,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-11-13 01:40:23,983 INFO L354 Elim1Store]: treesize reduction 146, result has 28.1 percent of original size [2021-11-13 01:40:23,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 243 treesize of output 181 [2021-11-13 01:40:25,411 INFO L354 Elim1Store]: treesize reduction 130, result has 23.1 percent of original size [2021-11-13 01:40:25,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 169 treesize of output 129 [2021-11-13 01:40:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:40:25,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:40:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:40:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706400824] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:40:31,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-13 01:40:31,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17, 16, 21, 16, 15] total 51 [2021-11-13 01:40:31,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724958025] [2021-11-13 01:40:31,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:40:31,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 01:40:31,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:40:31,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 01:40:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2331, Unknown=17, NotChecked=0, Total=2550 [2021-11-13 01:40:31,912 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 01:40:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:40:51,939 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-11-13 01:40:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 01:40:51,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-11-13 01:40:51,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:40:51,944 INFO L225 Difference]: With dead ends: 76 [2021-11-13 01:40:51,944 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 01:40:51,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 125.9s TimeCoverageRelationStatistics Valid=226, Invalid=2832, Unknown=22, NotChecked=0, Total=3080 [2021-11-13 01:40:51,947 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4268.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.18ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 4505.66ms IncrementalHoareTripleChecker+Time [2021-11-13 01:40:51,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 313 Invalid, 286 Unknown, 0 Unchecked, 4.18ms Time], IncrementalHoareTripleChecker [28 Valid, 216 Invalid, 0 Unknown, 42 Unchecked, 4505.66ms Time] [2021-11-13 01:40:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 01:40:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-13 01:40:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.12) internal successors, (56), 52 states have internal predecessors, (56), 13 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-13 01:40:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2021-11-13 01:40:51,962 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 42 [2021-11-13 01:40:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:40:51,962 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2021-11-13 01:40:51,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 01:40:51,963 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2021-11-13 01:40:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:40:51,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:40:51,965 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:40:51,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:52,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:52,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:40:52,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:40:52,591 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:40:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:40:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash 44813345, now seen corresponding path program 1 times [2021-11-13 01:40:52,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:40:52,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135573843] [2021-11-13 01:40:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:40:52,592 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:40:52,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:40:52,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:40:52,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:40:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:40:52,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 01:40:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:40:55,776 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 36 treesize of output 28 [2021-11-13 01:41:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:05,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:15,973 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 01:41:15,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2021-11-13 01:41:19,295 INFO L354 Elim1Store]: treesize reduction 29, result has 71.8 percent of original size [2021-11-13 01:41:19,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2021-11-13 01:41:19,364 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:41:19,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-13 01:41:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:41:20,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:20,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135573843] [2021-11-13 01:41:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135573843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:20,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1597286992] [2021-11-13 01:41:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:20,558 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:20,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:41:20,559 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:41:20,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 01:41:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:20,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 01:41:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:24,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-13 01:41:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:41:40,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:46,868 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 01:41:46,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2021-11-13 01:41:48,730 INFO L354 Elim1Store]: treesize reduction 29, result has 71.8 percent of original size [2021-11-13 01:41:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2021-11-13 01:41:48,802 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:41:48,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 54 [2021-11-13 01:41:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:41:49,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1597286992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:49,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781938283] [2021-11-13 01:41:49,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:49,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:41:49,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:49,532 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:41:49,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 01:41:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:49,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 01:41:49,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:50,026 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 01:41:50,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-13 01:41:50,234 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 01:41:50,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 38 [2021-11-13 01:41:50,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2021-11-13 01:42:03,968 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-13 01:42:03,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-11-13 01:42:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:42:21,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 01:42:24,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781938283] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:42:24,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-13 01:42:24,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 15, 18, 15, 10] total 47 [2021-11-13 01:42:24,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880804794] [2021-11-13 01:42:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:24,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:42:24,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:42:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1951, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 01:42:24,082 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 01:42:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:29,755 INFO L93 Difference]: Finished difference Result 119 states and 140 transitions. [2021-11-13 01:42:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:42:29,758 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-13 01:42:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:29,759 INFO L225 Difference]: With dead ends: 119 [2021-11-13 01:42:29,760 INFO L226 Difference]: Without dead ends: 79 [2021-11-13 01:42:29,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 188 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 01:42:29,762 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 29 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3475.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.75ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3648.32ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:29,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 169 Invalid, 208 Unknown, 0 Unchecked, 2.75ms Time], IncrementalHoareTripleChecker [18 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 3648.32ms Time] [2021-11-13 01:42:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-13 01:42:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-11-13 01:42:29,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 57 states have internal predecessors, (61), 13 states have call successors, (13), 8 states have call predecessors, (13), 10 states have return successors, (16), 12 states have call predecessors, (16), 12 states have call successors, (16) [2021-11-13 01:42:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-11-13 01:42:29,777 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 42 [2021-11-13 01:42:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:29,778 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-11-13 01:42:29,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 01:42:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-11-13 01:42:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:42:29,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:29,780 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 01:42:29,789 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-13 01:42:29,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:30,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:30,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:42:30,383 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:30,384 INFO L85 PathProgramCache]: Analyzing trace with hash -348213665, now seen corresponding path program 1 times [2021-11-13 01:42:30,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:30,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886502036] [2021-11-13 01:42:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:30,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:30,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:30,385 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:30,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:42:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:30,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:42:30,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:33,906 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 32 treesize of output 24 [2021-11-13 01:42:33,937 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 21 treesize of output 13 [2021-11-13 01:42:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:42:36,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:41,525 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 01:42:41,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-13 01:42:41,595 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:42:41,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-13 01:42:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:42:41,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:41,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886502036] [2021-11-13 01:42:41,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886502036] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:41,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1404692495] [2021-11-13 01:42:41,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:41,676 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:42:41,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:42:41,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:42:41,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-13 01:42:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 01:42:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:45,602 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 32 treesize of output 24 [2021-11-13 01:42:45,632 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 21 treesize of output 13 [2021-11-13 01:42:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:42:46,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:51,090 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 01:42:51,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-13 01:42:51,149 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:42:51,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-13 01:42:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:42:51,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1404692495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:51,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220452464] [2021-11-13 01:42:51,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:42:51,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:42:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:42:51,228 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:42:51,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 01:42:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:42:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 01:42:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:52,973 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 32 treesize of output 24 [2021-11-13 01:42:53,001 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 21 treesize of output 13 [2021-11-13 01:42:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:42:53,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:58,245 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 01:42:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-13 01:42:58,316 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 01:42:58,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-13 01:42:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:42:58,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220452464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:58,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:42:58,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12, 10, 11, 10] total 17 [2021-11-13 01:42:58,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221119578] [2021-11-13 01:42:58,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:42:58,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 01:42:58,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 01:42:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-13 01:42:58,398 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-13 01:43:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:08,023 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2021-11-13 01:43:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:43:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2021-11-13 01:43:08,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:08,026 INFO L225 Difference]: With dead ends: 134 [2021-11-13 01:43:08,026 INFO L226 Difference]: Without dead ends: 84 [2021-11-13 01:43:08,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:43:08,028 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 74 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3913.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.87ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 4034.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:08,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 317 Invalid, 340 Unknown, 0 Unchecked, 4.87ms Time], IncrementalHoareTripleChecker [46 Valid, 251 Invalid, 0 Unknown, 43 Unchecked, 4034.34ms Time] [2021-11-13 01:43:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-13 01:43:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-11-13 01:43:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 54 states have internal predecessors, (59), 12 states have call successors, (12), 8 states have call predecessors, (12), 9 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-13 01:43:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-11-13 01:43:08,043 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 42 [2021-11-13 01:43:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:08,043 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-11-13 01:43:08,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 6 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-13 01:43:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-11-13 01:43:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 01:43:08,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:08,046 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:08,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:08,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:08,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:08,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:43:08,650 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash -541770688, now seen corresponding path program 1 times [2021-11-13 01:43:08,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:08,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873868281] [2021-11-13 01:43:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:08,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:08,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:08,654 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:08,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:43:08,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:43:08,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:43:09,373 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 29 treesize of output 21 [2021-11-13 01:43:09,401 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 18 treesize of output 10 [2021-11-13 01:43:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:43:09,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:43:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:43:10,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:43:10,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873868281] [2021-11-13 01:43:10,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873868281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:43:10,818 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:43:10,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 01:43:10,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901709831] [2021-11-13 01:43:10,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:43:10,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:43:10,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:43:10,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:43:10,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:43:10,820 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:43:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:43:12,333 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-13 01:43:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:43:12,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2021-11-13 01:43:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:43:12,336 INFO L225 Difference]: With dead ends: 80 [2021-11-13 01:43:12,336 INFO L226 Difference]: Without dead ends: 78 [2021-11-13 01:43:12,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:43:12,338 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1063.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.34ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1105.88ms IncrementalHoareTripleChecker+Time [2021-11-13 01:43:12,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 314 Invalid, 69 Unknown, 0 Unchecked, 2.34ms Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 1105.88ms Time] [2021-11-13 01:43:12,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-13 01:43:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-13 01:43:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 57 states have internal predecessors, (62), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-13 01:43:12,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-11-13 01:43:12,352 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 48 [2021-11-13 01:43:12,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:43:12,353 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-11-13 01:43:12,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 01:43:12,353 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-11-13 01:43:12,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 01:43:12,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:43:12,355 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:43:12,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:43:12,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:43:12,564 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:43:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:43:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash -266250434, now seen corresponding path program 1 times [2021-11-13 01:43:12,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:43:12,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118653864] [2021-11-13 01:43:12,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:43:12,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:43:12,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:43:12,566 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:43:12,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:43:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:43:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-13 01:43:12,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:44:03,052 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:44:17,581 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:44:40,814 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:44:59,204 WARN L227 SmtUtils]: Spent 8.38s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:45:29,009 WARN L227 SmtUtils]: Spent 10.26s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:45:51,776 WARN L227 SmtUtils]: Spent 10.47s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:46:28,551 WARN L227 SmtUtils]: Spent 12.34s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:46:42,289 WARN L227 SmtUtils]: Spent 12.38s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:46:58,580 WARN L227 SmtUtils]: Spent 12.86s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:47:13,306 WARN L227 SmtUtils]: Spent 12.81s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:47:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:47:16,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:47:42,947 WARN L227 SmtUtils]: Spent 11.08s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:48:05,804 WARN L227 SmtUtils]: Spent 12.62s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 01:48:14,503 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:48:14,504 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-13 01:48:14,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-13 01:48:16,607 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-13 01:48:16,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-13 01:48:31,514 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 49 DAG size of output: 44 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:48:31,515 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-13 01:48:31,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-13 01:48:33,625 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-13 01:48:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-13 01:48:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 01:48:42,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:48:42,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118653864] [2021-11-13 01:48:42,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118653864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:48:42,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988152486] [2021-11-13 01:48:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:48:42,251 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:48:42,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:48:42,254 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:48:42,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9d0ab63-ac19-4356-9ef2-ee4ff7054c38/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-13 01:48:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:48:42,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 01:48:42,687 INFO L286 TraceCheckSpWp]: Computing forward predicates...