./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:30:11,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:30:11,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:30:11,612 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:30:11,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:30:11,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:30:11,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:30:11,619 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:30:11,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:30:11,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:30:11,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:30:11,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:30:11,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:30:11,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:30:11,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:30:11,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:30:11,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:30:11,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:30:11,646 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:30:11,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:30:11,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:30:11,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:30:11,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:30:11,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:30:11,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:30:11,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:30:11,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:30:11,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:30:11,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:30:11,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:30:11,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:30:11,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:30:11,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:30:11,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:30:11,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:30:11,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:30:11,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:30:11,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:30:11,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:30:11,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:30:11,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:30:11,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 13:30:11,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:30:11,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:30:11,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:30:11,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:30:11,737 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:30:11,737 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:30:11,737 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:30:11,737 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:30:11,744 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:30:11,744 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:30:11,745 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:30:11,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:30:11,746 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:30:11,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:30:11,746 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:30:11,747 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:30:11,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:30:11,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:30:11,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:30:11,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:30:11,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:30:11,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:30:11,749 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:30:11,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:30:11,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:30:11,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:30:11,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:30:11,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:30:11,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:11,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:30:11,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:30:11,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:30:11,753 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:30:11,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:30:11,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:30:11,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:30:11,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:30:11,754 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f [2021-11-19 13:30:11,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:30:12,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:30:12,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:30:12,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:30:12,010 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:30:12,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-19 13:30:12,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/fc6e44845/c1f50dcb1d05408182dc1d9fe5381008/FLAG83430a638 [2021-11-19 13:30:12,847 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:30:12,848 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-19 13:30:12,888 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/fc6e44845/c1f50dcb1d05408182dc1d9fe5381008/FLAG83430a638 [2021-11-19 13:30:13,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/fc6e44845/c1f50dcb1d05408182dc1d9fe5381008 [2021-11-19 13:30:13,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:30:13,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:30:13,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:13,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:30:13,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:30:13,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:13" (1/1) ... [2021-11-19 13:30:13,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6506bab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:13, skipping insertion in model container [2021-11-19 13:30:13,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:13" (1/1) ... [2021-11-19 13:30:13,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:30:13,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:13,454 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-19 13:30:13,460 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-19 13:30:13,481 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:30:13,486 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:30:14,355 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,357 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,357 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,359 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,360 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,378 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,380 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,382 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,383 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,385 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,386 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,387 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,388 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:14,833 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:30:14,834 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:30:14,836 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:30:14,841 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:30:14,844 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:30:14,849 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:30:14,850 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:30:14,851 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:30:14,852 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:30:14,852 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:30:15,005 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:30:15,049 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:15,076 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 13:30:15,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7217e9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:15, skipping insertion in model container [2021-11-19 13:30:15,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:15,078 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:30:15,080 INFO L158 Benchmark]: Toolchain (without parser) took 2003.32ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 64.0MB in the beginning and 73.5MB in the end (delta: -9.5MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2021-11-19 13:30:15,081 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory was 59.9MB in the beginning and 59.8MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:30:15,083 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1995.91ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 63.8MB in the beginning and 73.5MB in the end (delta: -9.7MB). Peak memory consumption was 16.6MB. Max. memory is 16.1GB. [2021-11-19 13:30:15,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory was 59.9MB in the beginning and 59.8MB in the end (delta: 41.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1995.91ms. Allocated memory was 104.9MB in the beginning and 132.1MB in the end (delta: 27.3MB). Free memory was 63.8MB in the beginning and 73.5MB in the end (delta: -9.7MB). Peak memory consumption was 16.6MB. 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_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:30:17,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:30:17,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:30:17,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:30:17,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:30:17,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:30:17,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:30:17,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:30:17,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:30:17,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:30:17,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:30:17,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:30:17,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:30:17,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:30:17,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:30:17,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:30:17,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:30:17,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:30:17,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:30:17,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:30:17,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:30:17,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:30:17,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:30:17,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:30:17,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:30:17,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:30:17,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:30:17,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:30:17,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:30:17,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:30:17,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:30:17,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:30:17,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:30:17,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:30:17,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:30:17,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:30:17,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:30:17,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:30:17,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:30:17,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:30:17,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:30:17,598 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 13:30:17,641 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:30:17,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:30:17,642 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:30:17,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:30:17,643 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:30:17,643 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:30:17,643 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:30:17,643 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:30:17,643 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:30:17,644 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:30:17,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:30:17,646 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:30:17,646 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:30:17,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:30:17,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:30:17,647 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:30:17,647 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:30:17,647 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:30:17,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:30:17,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:30:17,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:30:17,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:30:17,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:30:17,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:30:17,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:17,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:30:17,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:30:17,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:30:17,649 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:30:17,649 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:30:17,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:30:17,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:30:17,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:30:17,650 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_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aec0bb8b8715e014581c4eef5e1e25c7e0452a528f8abdf2f2a721d17b0fa7f [2021-11-19 13:30:18,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:30:18,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:30:18,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:30:18,052 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:30:18,052 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:30:18,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-19 13:30:18,131 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/6e4f6bd3b/74c629a6d6e746b4b74a1728ba7a187f/FLAGb6bbed709 [2021-11-19 13:30:19,081 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:30:19,082 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i [2021-11-19 13:30:19,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/6e4f6bd3b/74c629a6d6e746b4b74a1728ba7a187f/FLAGb6bbed709 [2021-11-19 13:30:19,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/data/6e4f6bd3b/74c629a6d6e746b4b74a1728ba7a187f [2021-11-19 13:30:19,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:30:19,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:30:19,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:19,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:30:19,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:30:19,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73816e4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:19, skipping insertion in model container [2021-11-19 13:30:19,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:30:19" (1/1) ... [2021-11-19 13:30:19,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:30:19,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:20,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-19 13:30:20,064 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-19 13:30:20,092 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:30:20,099 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:30:20,968 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:20,969 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:20,971 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:20,972 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:20,974 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,003 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,004 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,006 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,006 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,008 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,009 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,010 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,011 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,392 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:30:21,393 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:30:21,394 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:30:21,395 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:30:21,397 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:30:21,397 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:30:21,398 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:30:21,399 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:30:21,399 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:30:21,400 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:30:21,626 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:30:21,667 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:21,695 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:30:21,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:30:21,754 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-19 13:30:21,757 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-19 13:30:21,759 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:30:21,759 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:30:21,826 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,826 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,827 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,827 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,828 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,834 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,835 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,839 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,839 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,840 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,841 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,841 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,842 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:21,908 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:30:21,909 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:30:21,910 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:30:21,911 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:30:21,912 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:30:21,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:30:21,913 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:30:21,914 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:30:21,914 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:30:21,915 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:30:21,950 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:30:21,982 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:21,995 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:30:22,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4494,4507] [2021-11-19 13:30:22,024 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/sv-benchmarks/c/aws-c-common/aws_linked_list_prev_harness.i[4554,4567] [2021-11-19 13:30:22,026 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 13:30:22,028 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 13:30:22,061 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,061 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,062 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,062 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,063 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,069 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,070 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,071 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,071 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,072 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,073 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,073 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,073 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 13:30:22,137 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 13:30:22,138 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 13:30:22,139 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 13:30:22,140 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 13:30:22,140 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 13:30:22,141 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 13:30:22,141 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 13:30:22,142 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 13:30:22,142 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 13:30:22,143 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 13:30:22,163 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 13:30:22,176 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:30:22,485 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:30:22,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22 WrapperNode [2021-11-19 13:30:22,486 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:30:22,487 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:22,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:30:22,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:30:22,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,649 INFO L137 Inliner]: procedures = 700, calls = 1041, calls flagged for inlining = 50, calls inlined = 4, statements flattened = 58 [2021-11-19 13:30:22,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:30:22,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:30:22,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:30:22,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:30:22,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:30:22,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:30:22,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:30:22,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:30:22,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (1/1) ... [2021-11-19 13:30:22,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:30:22,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:30:22,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:30:22,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:30:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 13:30:22,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:30:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 13:30:22,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 13:30:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 13:30:22,807 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 13:30:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:30:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 13:30:22,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:30:22,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:30:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 13:30:22,808 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 13:30:22,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 13:30:22,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 13:30:22,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 13:30:22,823 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_prev_is_valid [2021-11-19 13:30:22,823 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_prev_is_valid [2021-11-19 13:30:23,154 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:30:23,156 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:30:23,407 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:30:23,415 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:30:23,415 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 13:30:23,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:23 BoogieIcfgContainer [2021-11-19 13:30:23,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:30:23,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:30:23,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:30:23,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:30:23,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:30:19" (1/3) ... [2021-11-19 13:30:23,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2dafd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:23, skipping insertion in model container [2021-11-19 13:30:23,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:30:22" (2/3) ... [2021-11-19 13:30:23,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b2dafd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:30:23, skipping insertion in model container [2021-11-19 13:30:23,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:30:23" (3/3) ... [2021-11-19 13:30:23,427 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_prev_harness.i [2021-11-19 13:30:23,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:30:23,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:30:23,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:30:23,493 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 13:30:23,494 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:30:23,513 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) [2021-11-19 13:30:23,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:30:23,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:23,521 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] [2021-11-19 13:30:23,521 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1117195627, now seen corresponding path program 1 times [2021-11-19 13:30:23,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:23,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766790400] [2021-11-19 13:30:23,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:23,553 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:23,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:23,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:23,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:30:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:23,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:30:23,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:23,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:30:24,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:24,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766790400] [2021-11-19 13:30:24,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766790400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:30:24,073 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:30:24,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:30:24,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828735361] [2021-11-19 13:30:24,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:24,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:30:24,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:24,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:30:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:30:24,133 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) [2021-11-19 13:30:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:24,183 INFO L93 Difference]: Finished difference Result 94 states and 124 transitions. [2021-11-19 13:30:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:30:24,185 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 [2021-11-19 13:30:24,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:24,195 INFO L225 Difference]: With dead ends: 94 [2021-11-19 13:30:24,195 INFO L226 Difference]: Without dead ends: 45 [2021-11-19 13:30:24,199 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 [2021-11-19 13:30:24,205 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:24,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:30:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-19 13:30:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-19 13:30:24,278 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) [2021-11-19 13:30:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2021-11-19 13:30:24,284 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 28 [2021-11-19 13:30:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:24,287 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2021-11-19 13:30:24,287 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) [2021-11-19 13:30:24,288 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2021-11-19 13:30:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:30:24,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:24,291 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] [2021-11-19 13:30:24,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:30:24,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:24,509 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash 96127273, now seen corresponding path program 1 times [2021-11-19 13:30:24,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:24,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255500667] [2021-11-19 13:30:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:24,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:24,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:24,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:24,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:30:24,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 13:30:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:27,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:30:41,500 WARN L227 SmtUtils]: Spent 10.08s 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) [2021-11-19 13:30:51,852 WARN L227 SmtUtils]: Spent 10.09s 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) [2021-11-19 13:30:54,723 INFO L354 Elim1Store]: treesize reduction 27, result has 76.5 percent of original size [2021-11-19 13:30:54,724 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 80 treesize of output 131 [2021-11-19 13:30:55,044 INFO L354 Elim1Store]: treesize reduction 19, result has 75.9 percent of original size [2021-11-19 13:30:55,044 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 119 treesize of output 136 [2021-11-19 13:30:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:30:56,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:30:56,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255500667] [2021-11-19 13:30:56,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255500667] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:30:56,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:30:56,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [15] total 29 [2021-11-19 13:30:56,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530091399] [2021-11-19 13:30:56,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:30:56,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 13:30:56,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:30:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 13:30:56,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=726, Unknown=1, NotChecked=0, Total=812 [2021-11-19 13:30:56,334 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) [2021-11-19 13:30:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:30:57,233 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2021-11-19 13:30:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 13:30:57,234 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 [2021-11-19 13:30:57,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:30:57,238 INFO L225 Difference]: With dead ends: 84 [2021-11-19 13:30:57,239 INFO L226 Difference]: Without dead ends: 82 [2021-11-19 13:30:57,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=105, Invalid=886, Unknown=1, NotChecked=0, Total=992 [2021-11-19 13:30:57,241 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 29 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:30:57,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 856 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 92 Unchecked, 0.6s Time] [2021-11-19 13:30:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-19 13:30:57,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-11-19 13:30:57,259 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) [2021-11-19 13:30:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-11-19 13:30:57,261 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 28 [2021-11-19 13:30:57,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:30:57,262 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-11-19 13:30:57,262 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) [2021-11-19 13:30:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-11-19 13:30:57,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:30:57,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:30:57,264 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] [2021-11-19 13:30:57,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-19 13:30:57,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:30:57,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:30:57,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:30:57,465 INFO L85 PathProgramCache]: Analyzing trace with hash -713219353, now seen corresponding path program 1 times [2021-11-19 13:30:57,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:30:57,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878099841] [2021-11-19 13:30:57,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:30:57,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:30:57,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:30:57,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:30:57,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:30:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:30:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 13:30:57,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:30:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:30:59,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:03,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:31:03,294 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 40 treesize of output 43 [2021-11-19 13:31:03,326 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:31:03,327 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 39 treesize of output 34 [2021-11-19 13:31:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:31:03,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:31:03,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878099841] [2021-11-19 13:31:03,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878099841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760057561] [2021-11-19 13:31:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:03,363 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:31:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:31:03,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:31:03,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-19 13:31:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:03,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 13:31:03,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:04,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:07,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:31:07,704 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 40 treesize of output 43 [2021-11-19 13:31:07,727 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:31:07,728 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 39 treesize of output 34 [2021-11-19 13:31:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:31:07,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [760057561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:07,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231962117] [2021-11-19 13:31:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:31:07,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:31:07,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:31:07,792 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:31:07,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 13:31:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:31:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:31:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:31:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:31:08,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:31:11,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:31:11,468 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 40 treesize of output 43 [2021-11-19 13:31:11,496 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:31:11,496 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 39 treesize of output 34 [2021-11-19 13:31:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:31:11,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231962117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:31:11,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:31:11,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13, 11, 13, 11] total 22 [2021-11-19 13:31:11,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960915732] [2021-11-19 13:31:11,529 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:31:11,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-19 13:31:11,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:31:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-19 13:31:11,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-11-19 13:31:11,531 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 13:31:16,109 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:18,245 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:31:41,497 WARN L227 SmtUtils]: Spent 20.56s on a formula simplification. DAG size of input: 51 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:31:58,353 WARN L227 SmtUtils]: Spent 16.58s on a formula simplification. DAG size of input: 59 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:32:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:17,798 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2021-11-19 13:32:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 13:32:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 28 [2021-11-19 13:32:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:17,801 INFO L225 Difference]: With dead ends: 133 [2021-11-19 13:32:17,801 INFO L226 Difference]: Without dead ends: 82 [2021-11-19 13:32:17,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 64.1s TimeCoverageRelationStatistics Valid=245, Invalid=1004, Unknown=11, NotChecked=0, Total=1260 [2021-11-19 13:32:17,804 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 65 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 30 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:17,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 249 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 183 Invalid, 2 Unknown, 107 Unchecked, 4.9s Time] [2021-11-19 13:32:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-19 13:32:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2021-11-19 13:32:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (19), 14 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-19 13:32:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2021-11-19 13:32:17,822 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 28 [2021-11-19 13:32:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:17,823 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2021-11-19 13:32:17,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 13:32:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2021-11-19 13:32:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-19 13:32:17,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:17,825 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] [2021-11-19 13:32:17,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:18,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:18,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-19 13:32:18,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:18,428 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1106246363, now seen corresponding path program 1 times [2021-11-19 13:32:18,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:18,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257938064] [2021-11-19 13:32:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:18,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:18,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:18,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:18,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:32:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:18,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:32:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:18,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:18,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:18,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257938064] [2021-11-19 13:32:18,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257938064] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:32:18,807 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:32:18,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 13:32:18,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414433248] [2021-11-19 13:32:18,808 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:32:18,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:32:18,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:32:18,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:32:18,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:32:18,809 INFO L87 Difference]: Start difference. First operand 77 states and 95 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) [2021-11-19 13:32:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:32:18,878 INFO L93 Difference]: Finished difference Result 149 states and 179 transitions. [2021-11-19 13:32:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:32:18,880 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 [2021-11-19 13:32:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:32:18,881 INFO L225 Difference]: With dead ends: 149 [2021-11-19 13:32:18,881 INFO L226 Difference]: Without dead ends: 67 [2021-11-19 13:32:18,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:32:18,883 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:32:18,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 191 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:32:18,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-19 13:32:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-19 13:32:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 41 states have (on average 1.146341463414634) internal successors, (47), 43 states have internal predecessors, (47), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 13:32:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-19 13:32:18,904 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 28 [2021-11-19 13:32:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:32:18,904 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-19 13:32:18,904 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) [2021-11-19 13:32:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-19 13:32:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 13:32:18,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:32:18,913 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] [2021-11-19 13:32:18,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:32:19,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:32:19,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:32:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:32:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash 695086179, now seen corresponding path program 1 times [2021-11-19 13:32:19,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:32:19,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850231291] [2021-11-19 13:32:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:19,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:32:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:32:19,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:32:19,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:32:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:19,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 13:32:19,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:32:22,201 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-19 13:32:22,201 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 221 treesize of output 174 [2021-11-19 13:32:22,450 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-19 13:32:22,450 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 145 treesize of output 133 [2021-11-19 13:32:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:32:22,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:32:27,535 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-19 13:32:27,535 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 136 treesize of output 1 [2021-11-19 13:32:41,610 WARN L227 SmtUtils]: Spent 9.03s 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) [2021-11-19 13:32:41,611 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-19 13:32:41,611 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 136 treesize of output 223 [2021-11-19 13:32:42,767 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-19 13:32:42,768 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 239 treesize of output 236 [2021-11-19 13:32:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:32:57,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:32:57,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850231291] [2021-11-19 13:32:57,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850231291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:32:57,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033825644] [2021-11-19 13:32:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:32:57,863 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:32:57,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:32:57,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:32:57,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 13:32:58,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:32:58,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-19 13:32:58,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:00,148 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-19 13:33:00,149 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 221 treesize of output 174 [2021-11-19 13:33:00,510 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-19 13:33:00,510 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 145 treesize of output 133 [2021-11-19 13:33:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:00,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:15,687 WARN L227 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 29 DAG size of output: 4 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 13:33:15,688 INFO L354 Elim1Store]: treesize reduction 46, result has 8.0 percent of original size [2021-11-19 13:33:15,688 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 136 treesize of output 76 [2021-11-19 13:33:15,704 INFO L354 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2021-11-19 13:33:15,705 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 1 [2021-11-19 13:33:24,898 WARN L227 SmtUtils]: Spent 9.07s 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) [2021-11-19 13:33:24,899 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-19 13:33:24,899 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 136 treesize of output 223 [2021-11-19 13:33:25,961 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-19 13:33:25,962 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 239 treesize of output 236 [2021-11-19 13:33:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:33:55,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033825644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:33:55,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276625155] [2021-11-19 13:33:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:33:55,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:33:55,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:33:55,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:33:55,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 13:33:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:33:55,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-19 13:33:55,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:33:56,401 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-19 13:33:56,401 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 221 treesize of output 174 [2021-11-19 13:33:56,659 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-19 13:33:56,660 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 135 treesize of output 131 [2021-11-19 13:33:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:33:56,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:33:58,318 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-19 13:33:58,318 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 136 treesize of output 1 [2021-11-19 13:34:07,216 WARN L227 SmtUtils]: Spent 8.81s 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) [2021-11-19 13:34:07,217 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-19 13:34:07,217 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 136 treesize of output 223 [2021-11-19 13:34:08,180 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-19 13:34:08,180 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 239 treesize of output 236 [2021-11-19 13:35:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:35:11,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276625155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:35:11,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:35:11,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18, 16, 18, 16] total 31 [2021-11-19 13:35:11,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011486663] [2021-11-19 13:35:11,661 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:35:11,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 13:35:11,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:35:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 13:35:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=847, Unknown=2, NotChecked=0, Total=930 [2021-11-19 13:35:11,664 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 31 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 13:35:19,496 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:35:30,229 WARN L227 SmtUtils]: Spent 10.51s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:35:41,864 WARN L227 SmtUtils]: Spent 10.51s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:35:52,569 WARN L227 SmtUtils]: Spent 10.50s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:36:03,597 WARN L227 SmtUtils]: Spent 10.53s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:36:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:04,091 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-19 13:36:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 13:36:04,092 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 42 [2021-11-19 13:36:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:04,094 INFO L225 Difference]: With dead ends: 94 [2021-11-19 13:36:04,094 INFO L226 Difference]: Without dead ends: 88 [2021-11-19 13:36:04,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 208 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 62.5s TimeCoverageRelationStatistics Valid=167, Invalid=1811, Unknown=2, NotChecked=0, Total=1980 [2021-11-19 13:36:04,096 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:04,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 865 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 273 Invalid, 0 Unknown, 149 Unchecked, 1.3s Time] [2021-11-19 13:36:04,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-19 13:36:04,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-11-19 13:36:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 13 states have call successors, (13), 9 states have call predecessors, (13), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 13:36:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-19 13:36:04,109 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 42 [2021-11-19 13:36:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:04,110 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-19 13:36:04,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 8 states have call successors, (12), 4 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-19 13:36:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-19 13:36:04,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 13:36:04,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:04,112 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] [2021-11-19 13:36:04,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:04,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-19 13:36:04,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-19 13:36:04,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:04,726 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -114260447, now seen corresponding path program 1 times [2021-11-19 13:36:04,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:04,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406298176] [2021-11-19 13:36:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:04,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:04,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:04,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:04,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:36:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:04,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 13:36:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:05,366 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 34 treesize of output 26 [2021-11-19 13:36:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:07,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:09,241 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-19 13:36:09,241 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 41 treesize of output 13 [2021-11-19 13:36:14,180 INFO L354 Elim1Store]: treesize reduction 27, result has 76.5 percent of original size [2021-11-19 13:36:14,181 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 41 treesize of output 104 [2021-11-19 13:36:14,231 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:36:14,231 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 88 treesize of output 65 [2021-11-19 13:36:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:14,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:14,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406298176] [2021-11-19 13:36:14,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406298176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:14,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471411201] [2021-11-19 13:36:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:14,622 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:14,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:14,622 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:14,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-19 13:36:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 13:36:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:15,142 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 23 treesize of output 15 [2021-11-19 13:36:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:16,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:17,458 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-19 13:36:17,459 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 41 treesize of output 13 [2021-11-19 13:36:21,964 INFO L354 Elim1Store]: treesize reduction 27, result has 76.5 percent of original size [2021-11-19 13:36:21,965 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 41 treesize of output 104 [2021-11-19 13:36:22,011 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:36:22,011 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 88 treesize of output 65 [2021-11-19 13:36:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:22,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1471411201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:22,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110338673] [2021-11-19 13:36:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:22,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:22,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:22,200 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:22,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 13:36:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 13:36:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:22,557 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 34 treesize of output 26 [2021-11-19 13:36:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 13:36:23,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:25,234 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-11-19 13:36:25,234 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 41 treesize of output 13 [2021-11-19 13:36:29,716 INFO L354 Elim1Store]: treesize reduction 27, result has 76.5 percent of original size [2021-11-19 13:36:29,716 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 41 treesize of output 104 [2021-11-19 13:36:29,764 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:36:29,764 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 88 treesize of output 65 [2021-11-19 13:36:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:29,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110338673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:29,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:36:29,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 17, 15, 16, 15] total 30 [2021-11-19 13:36:29,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753340242] [2021-11-19 13:36:29,901 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:36:29,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-19 13:36:29,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-19 13:36:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-11-19 13:36:29,903 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 30 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 8 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-19 13:36:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:32,407 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2021-11-19 13:36:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 13:36:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 8 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 42 [2021-11-19 13:36:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:32,410 INFO L225 Difference]: With dead ends: 131 [2021-11-19 13:36:32,410 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 13:36:32,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 203 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 13:36:32,413 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:32,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 657 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 134 Invalid, 0 Unknown, 150 Unchecked, 0.6s Time] [2021-11-19 13:36:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 13:36:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-11-19 13:36:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 60 states have internal predecessors, (66), 13 states have call successors, (13), 9 states have call predecessors, (13), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 13:36:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-11-19 13:36:32,425 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 42 [2021-11-19 13:36:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:32,426 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-11-19 13:36:32,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.36) internal successors, (59), 26 states have internal predecessors, (59), 8 states have call successors, (12), 3 states have call predecessors, (12), 8 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-19 13:36:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-11-19 13:36:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-19 13:36:32,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:32,428 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] [2021-11-19 13:36:32,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:32,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:32,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-19 13:36:33,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:33,041 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:33,041 INFO L85 PathProgramCache]: Analyzing trace with hash -507287457, now seen corresponding path program 1 times [2021-11-19 13:36:33,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:33,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887094023] [2021-11-19 13:36:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:33,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:33,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:33,043 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:33,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:36:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 13:36:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:33,974 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 [2021-11-19 13:36:33,977 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 [2021-11-19 13:36:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:34,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:37,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:36:37,418 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 40 treesize of output 43 [2021-11-19 13:36:37,449 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:36:37,449 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 39 treesize of output 34 [2021-11-19 13:36:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:37,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:37,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887094023] [2021-11-19 13:36:37,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887094023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:37,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819474042] [2021-11-19 13:36:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:37,479 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:36:37,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:36:37,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:36:37,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 13:36:37,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:37,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 13:36:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:38,528 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 [2021-11-19 13:36:38,532 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 [2021-11-19 13:36:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:38,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:41,515 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:36:41,516 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 40 treesize of output 35 [2021-11-19 13:36:41,534 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-19 13:36:41,535 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 31 treesize of output 19 [2021-11-19 13:36:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:41,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819474042] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:41,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833866586] [2021-11-19 13:36:41,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:41,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:36:41,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:36:41,552 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:36:41,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 13:36:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 13:36:41,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:42,080 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 [2021-11-19 13:36:42,083 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 [2021-11-19 13:36:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:42,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:45,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:36:45,005 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 40 treesize of output 43 [2021-11-19 13:36:45,035 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:36:45,035 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 39 treesize of output 34 [2021-11-19 13:36:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 13:36:45,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833866586] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:36:45,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:36:45,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 12, 10] total 18 [2021-11-19 13:36:45,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775933587] [2021-11-19 13:36:45,066 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:36:45,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 13:36:45,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:45,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 13:36:45,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-19 13:36:45,068 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 13:36:53,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:36:55,014 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 13:36:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:55,395 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2021-11-19 13:36:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 13:36:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 42 [2021-11-19 13:36:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:55,398 INFO L225 Difference]: With dead ends: 136 [2021-11-19 13:36:55,398 INFO L226 Difference]: Without dead ends: 86 [2021-11-19 13:36:55,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 229 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=114, Invalid=534, Unknown=2, NotChecked=0, Total=650 [2021-11-19 13:36:55,400 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 43 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:55,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 346 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 292 Invalid, 2 Unknown, 39 Unchecked, 5.2s Time] [2021-11-19 13:36:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-19 13:36:55,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-11-19 13:36:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 55 states have internal predecessors, (60), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 13:36:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2021-11-19 13:36:55,412 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 42 [2021-11-19 13:36:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:55,413 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2021-11-19 13:36:55,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 6 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 13:36:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2021-11-19 13:36:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-19 13:36:55,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:55,414 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] [2021-11-19 13:36:55,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:55,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-19 13:36:55,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 13:36:56,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:56,021 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:56,021 INFO L85 PathProgramCache]: Analyzing trace with hash 709260864, now seen corresponding path program 1 times [2021-11-19 13:36:56,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:56,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807176103] [2021-11-19 13:36:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:56,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:56,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:56,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:56,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:36:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:36:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:36:56,330 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 37 treesize of output 25 [2021-11-19 13:36:56,333 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 22 treesize of output 10 [2021-11-19 13:36:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:56,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:36:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:36:56,630 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:36:56,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807176103] [2021-11-19 13:36:56,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807176103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:36:56,631 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:36:56,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-19 13:36:56,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743334777] [2021-11-19 13:36:56,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:36:56,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:36:56,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:36:56,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:36:56,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:36:56,632 INFO L87 Difference]: Start difference. First operand 76 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) [2021-11-19 13:36:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:36:57,045 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-19 13:36:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:36:57,046 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 [2021-11-19 13:36:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:36:57,047 INFO L225 Difference]: With dead ends: 82 [2021-11-19 13:36:57,047 INFO L226 Difference]: Without dead ends: 80 [2021-11-19 13:36:57,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 13:36:57,049 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 10 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 13:36:57,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 314 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 13:36:57,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-19 13:36:57,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-19 13:36:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.105263157894737) internal successors, (63), 58 states have internal predecessors, (63), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-19 13:36:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-19 13:36:57,061 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 48 [2021-11-19 13:36:57,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:36:57,061 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-19 13:36:57,061 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) [2021-11-19 13:36:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-19 13:36:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:36:57,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:36:57,063 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] [2021-11-19 13:36:57,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:36:57,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:36:57,280 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:36:57,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:36:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash -593356994, now seen corresponding path program 1 times [2021-11-19 13:36:57,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:36:57,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039268640] [2021-11-19 13:36:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:36:57,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:36:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:36:57,282 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:36:57,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:36:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:36:57,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 13:36:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:37:01,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:16,141 WARN L227 SmtUtils]: Spent 10.12s 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) [2021-11-19 13:37:26,947 WARN L227 SmtUtils]: Spent 10.14s 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) [2021-11-19 13:37:31,999 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-19 13:37:31,999 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 80 treesize of output 135 [2021-11-19 13:37:32,502 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-19 13:37:32,503 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 123 treesize of output 147 [2021-11-19 13:37:41,902 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-19 13:37:41,903 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 80 treesize of output 135 [2021-11-19 13:37:42,342 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-19 13:37:42,342 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 123 treesize of output 147 [2021-11-19 13:37:43,424 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:37:43,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:37:43,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039268640] [2021-11-19 13:37:43,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039268640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:37:43,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688383475] [2021-11-19 13:37:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:37:43,426 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:37:43,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:37:43,426 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:37:43,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 13:37:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:37:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 13:37:43,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:37:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:37:48,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:37:56,539 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-19 13:37:56,540 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 80 treesize of output 135 [2021-11-19 13:37:56,985 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-19 13:37:56,985 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 123 treesize of output 147 [2021-11-19 13:38:05,990 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-19 13:38:05,990 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 80 treesize of output 135 [2021-11-19 13:38:06,454 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-19 13:38:06,455 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 123 treesize of output 147 [2021-11-19 13:38:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:38:08,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688383475] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:38:08,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168735683] [2021-11-19 13:38:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:38:08,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:38:08,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:38:08,735 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:38:08,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 13:38:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:38:08,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-19 13:38:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:38:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 13:38:13,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:38:27,238 WARN L227 SmtUtils]: Spent 10.12s 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) [2021-11-19 13:38:37,766 WARN L227 SmtUtils]: Spent 10.12s 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) [2021-11-19 13:38:45,987 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-19 13:38:45,988 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 80 treesize of output 135 [2021-11-19 13:38:46,460 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-19 13:38:46,460 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 123 treesize of output 147 [2021-11-19 13:38:54,513 INFO L354 Elim1Store]: treesize reduction 23, result has 80.0 percent of original size [2021-11-19 13:38:54,513 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 80 treesize of output 135 [2021-11-19 13:38:54,947 INFO L354 Elim1Store]: treesize reduction 12, result has 84.8 percent of original size [2021-11-19 13:38:54,948 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 123 treesize of output 147 [2021-11-19 13:39:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 13:39:01,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168735683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:01,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:39:01,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 20, 16, 23, 20] total 42 [2021-11-19 13:39:01,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858509756] [2021-11-19 13:39:01,242 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:39:01,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 13:39:01,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:01,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 13:39:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1559, Unknown=2, NotChecked=0, Total=1722 [2021-11-19 13:39:01,245 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 42 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 34 states have internal predecessors, (94), 14 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-19 13:39:27,690 WARN L227 SmtUtils]: Spent 20.27s on a formula simplification. DAG size of input: 29 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:39:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:27,701 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2021-11-19 13:39:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 13:39:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 34 states have internal predecessors, (94), 14 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) Word has length 63 [2021-11-19 13:39:27,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:27,704 INFO L225 Difference]: With dead ends: 91 [2021-11-19 13:39:27,704 INFO L226 Difference]: Without dead ends: 89 [2021-11-19 13:39:27,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 298 SyntacticMatches, 37 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 86.7s TimeCoverageRelationStatistics Valid=286, Invalid=2681, Unknown=3, NotChecked=0, Total=2970 [2021-11-19 13:39:27,706 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:27,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 715 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 217 Invalid, 0 Unknown, 180 Unchecked, 1.2s Time] [2021-11-19 13:39:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-19 13:39:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-11-19 13:39:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 60 states have internal predecessors, (64), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-19 13:39:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-11-19 13:39:27,724 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 63 [2021-11-19 13:39:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:27,725 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-11-19 13:39:27,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 34 states have internal predecessors, (94), 14 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (31), 11 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-19 13:39:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-11-19 13:39:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:39:27,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:27,727 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:27,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:27,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:28,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 13:39:28,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:28,331 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1402703620, now seen corresponding path program 1 times [2021-11-19 13:39:28,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:28,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357392531] [2021-11-19 13:39:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:28,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:28,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:28,333 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:28,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 13:39:28,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:28,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 13:39:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 13:39:32,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:35,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:39:35,693 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 40 treesize of output 43 [2021-11-19 13:39:35,724 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:39:35,724 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 39 treesize of output 34 [2021-11-19 13:39:38,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:39:38,183 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 40 treesize of output 43 [2021-11-19 13:39:38,216 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:39:38,217 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 39 treesize of output 34 [2021-11-19 13:39:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:39:38,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:38,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357392531] [2021-11-19 13:39:38,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357392531] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:38,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [862486901] [2021-11-19 13:39:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:38,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:39:38,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:39:38,270 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:39:38,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-19 13:39:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:38,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 13:39:38,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 13:39:40,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:44,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:39:44,685 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 40 treesize of output 43 [2021-11-19 13:39:44,722 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:39:44,722 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 39 treesize of output 34 [2021-11-19 13:39:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 13:39:44,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [862486901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:39:44,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354919365] [2021-11-19 13:39:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:44,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:39:44,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:39:44,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:39:44,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 13:39:44,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 13:39:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 13:39:46,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:50,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 13:39:50,382 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 40 treesize of output 43 [2021-11-19 13:39:50,413 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 13:39:50,413 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 39 treesize of output 34 [2021-11-19 13:39:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:39:50,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354919365] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:50,484 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-19 13:39:50,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [13, 12, 13, 13] total 31 [2021-11-19 13:39:50,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723473865] [2021-11-19 13:39:50,485 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:50,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 13:39:50,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:50,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 13:39:50,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-11-19 13:39:50,486 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 7 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 13:39:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:51,728 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2021-11-19 13:39:51,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 13:39:51,730 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 7 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 63 [2021-11-19 13:39:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:51,731 INFO L225 Difference]: With dead ends: 113 [2021-11-19 13:39:51,731 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 13:39:51,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 317 SyntacticMatches, 27 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-11-19 13:39:51,733 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 34 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:51,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 497 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 123 Invalid, 0 Unknown, 210 Unchecked, 0.5s Time] [2021-11-19 13:39:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 13:39:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-11-19 13:39:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-19 13:39:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-11-19 13:39:51,745 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 63 [2021-11-19 13:39:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:51,745 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-11-19 13:39:51,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 7 states have call successors, (17), 3 states have call predecessors, (17), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-19 13:39:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-11-19 13:39:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 13:39:51,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:51,747 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:51,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:51,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:52,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-19 13:39:52,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 13:39:52,357 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:52,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1795730630, now seen corresponding path program 1 times [2021-11-19 13:39:52,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:52,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841478537] [2021-11-19 13:39:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:52,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:52,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:52,359 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:52,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 13:39:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:52,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 13:39:52,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:39:52,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:39:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 13:39:52,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:39:52,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841478537] [2021-11-19 13:39:52,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841478537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:39:52,954 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:39:52,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 13:39:52,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071811054] [2021-11-19 13:39:52,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:39:52,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 13:39:52,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:39:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 13:39:52,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:39:52,956 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 13:39:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:39:52,995 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2021-11-19 13:39:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:39:52,996 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 63 [2021-11-19 13:39:52,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:39:52,997 INFO L225 Difference]: With dead ends: 110 [2021-11-19 13:39:52,997 INFO L226 Difference]: Without dead ends: 80 [2021-11-19 13:39:52,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:39:52,999 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:39:52,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 193 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:39:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-19 13:39:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-19 13:39:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 13:39:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-11-19 13:39:53,009 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 63 [2021-11-19 13:39:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:39:53,009 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-11-19 13:39:53,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-19 13:39:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-11-19 13:39:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 13:39:53,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:39:53,012 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:39:53,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-19 13:39:53,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:39:53,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:39:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:39:53,229 INFO L85 PathProgramCache]: Analyzing trace with hash 180273006, now seen corresponding path program 1 times [2021-11-19 13:39:53,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:39:53,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875947372] [2021-11-19 13:39:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:39:53,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:39:53,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:39:53,230 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:39:53,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 13:39:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:39:53,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 13:39:53,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:39:58,152 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-19 13:39:58,153 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 221 treesize of output 174 [2021-11-19 13:39:58,410 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-19 13:39:58,410 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 135 treesize of output 131 [2021-11-19 13:39:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 13:39:58,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:40:05,596 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-19 13:40:05,597 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 136 treesize of output 1 [2021-11-19 13:40:19,582 WARN L227 SmtUtils]: Spent 9.00s 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) [2021-11-19 13:40:19,583 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-19 13:40:19,583 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 136 treesize of output 223 [2021-11-19 13:40:20,779 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-19 13:40:20,780 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 239 treesize of output 236 [2021-11-19 13:40:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 13:40:30,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:40:30,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875947372] [2021-11-19 13:40:30,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875947372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:40:30,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [755086841] [2021-11-19 13:40:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:40:30,704 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 13:40:30,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 13:40:30,705 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 13:40:30,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-19 13:40:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:40:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 13:40:31,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:41:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:41:31,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:41:47,509 WARN L227 SmtUtils]: Spent 11.80s 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) [2021-11-19 13:42:11,945 WARN L227 SmtUtils]: Spent 13.00s 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) [2021-11-19 13:42:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 13:42:16,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [755086841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:42:16,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367751280] [2021-11-19 13:42:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:42:16,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 13:42:16,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:42:16,007 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 13:42:16,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 13:42:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:42:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 13:42:16,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:42:28,715 INFO L354 Elim1Store]: treesize reduction 85, result has 43.0 percent of original size [2021-11-19 13:42:28,715 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 221 treesize of output 174 [2021-11-19 13:42:29,473 INFO L354 Elim1Store]: treesize reduction 59, result has 47.8 percent of original size [2021-11-19 13:42:29,474 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 145 treesize of output 133 [2021-11-19 13:42:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:42:29,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:42:40,048 INFO L354 Elim1Store]: treesize reduction 49, result has 2.0 percent of original size [2021-11-19 13:42:40,048 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 136 treesize of output 1 [2021-11-19 13:42:49,926 WARN L227 SmtUtils]: Spent 9.67s 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) [2021-11-19 13:42:49,926 INFO L354 Elim1Store]: treesize reduction 27, result has 84.6 percent of original size [2021-11-19 13:42:49,927 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 136 treesize of output 223 [2021-11-19 13:42:51,633 INFO L354 Elim1Store]: treesize reduction 29, result has 77.2 percent of original size [2021-11-19 13:42:51,633 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 239 treesize of output 236 [2021-11-19 13:43:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 13:43:12,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367751280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 13:43:12,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 13:43:12,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 20, 17, 24, 22] total 60 [2021-11-19 13:43:12,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005538103] [2021-11-19 13:43:12,370 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 13:43:12,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-19 13:43:12,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:43:12,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-19 13:43:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3290, Unknown=10, NotChecked=0, Total=3540 [2021-11-19 13:43:12,375 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 60 states, 51 states have (on average 2.549019607843137) internal successors, (130), 50 states have internal predecessors, (130), 18 states have call successors, (45), 5 states have call predecessors, (45), 15 states have return successors, (44), 18 states have call predecessors, (44), 16 states have call successors, (44) [2021-11-19 13:43:24,864 WARN L227 SmtUtils]: Spent 10.56s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:43:36,151 WARN L227 SmtUtils]: Spent 10.52s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:43:52,171 WARN L227 SmtUtils]: Spent 10.58s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:44:03,424 WARN L227 SmtUtils]: Spent 10.62s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 13:44:08,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:44:08,950 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2021-11-19 13:44:08,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 13:44:08,950 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 51 states have (on average 2.549019607843137) internal successors, (130), 50 states have internal predecessors, (130), 18 states have call successors, (45), 5 states have call predecessors, (45), 15 states have return successors, (44), 18 states have call predecessors, (44), 16 states have call successors, (44) Word has length 77 [2021-11-19 13:44:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:44:08,951 INFO L225 Difference]: With dead ends: 93 [2021-11-19 13:44:08,951 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 13:44:08,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 371 SyntacticMatches, 27 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 178.8s TimeCoverageRelationStatistics Valid=371, Invalid=5169, Unknown=10, NotChecked=0, Total=5550 [2021-11-19 13:44:08,954 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 58 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 13:44:08,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 721 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 418 Invalid, 0 Unknown, 338 Unchecked, 4.4s Time] [2021-11-19 13:44:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 13:44:08,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-19 13:44:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 13 states have call successors, (13), 12 states have call predecessors, (13), 13 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-19 13:44:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-11-19 13:44:08,967 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 77 [2021-11-19 13:44:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:44:08,967 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-11-19 13:44:08,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 51 states have (on average 2.549019607843137) internal successors, (130), 50 states have internal predecessors, (130), 18 states have call successors, (45), 5 states have call predecessors, (45), 15 states have return successors, (44), 18 states have call predecessors, (44), 16 states have call successors, (44) [2021-11-19 13:44:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-11-19 13:44:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 13:44:08,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:44:08,970 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:44:09,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 13:44:09,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-19 13:44:09,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-19 13:44:09,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:44:09,584 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:44:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:44:09,585 INFO L85 PathProgramCache]: Analyzing trace with hash -629073620, now seen corresponding path program 1 times [2021-11-19 13:44:09,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:44:09,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816203554] [2021-11-19 13:44:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:44:09,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:44:09,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:44:09,587 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:44:09,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_152ad119-dd4d-4f45-b235-1c776e670769/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 13:44:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:44:09,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 13:44:09,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:44:11,249 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 34 treesize of output 26