./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:23:58,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:23:58,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:23:58,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:23:58,495 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:23:58,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:23:58,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:23:58,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:23:58,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:23:58,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:23:58,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:23:58,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:23:58,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:23:58,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:23:58,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:23:58,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:23:58,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:23:58,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:23:58,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:23:58,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:23:58,511 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:23:58,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:23:58,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:23:58,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:23:58,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:23:58,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:23:58,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:23:58,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:23:58,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:23:58,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:23:58,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:23:58,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:23:58,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:23:58,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:23:58,523 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:23:58,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:23:58,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:23:58,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:23:58,525 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:23:58,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:23:58,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:23:58,527 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:23:58,547 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:23:58,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:23:58,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:23:58,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:23:58,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:23:58,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:23:58,548 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:23:58,549 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:23:58,549 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:23:58,549 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:23:58,549 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:23:58,549 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:23:58,549 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:23:58,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:23:58,550 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:23:58,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:23:58,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:23:58,550 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:23:58,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:23:58,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:23:58,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:23:58,551 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:23:58,551 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:23:58,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:23:58,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:23:58,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:23:58,552 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:23:58,552 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:23:58,552 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:23:58,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:23:58,553 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:23:58,553 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:23:58,553 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:23:58,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:23:58,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:23:58,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:23:58,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:23:58,554 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:23:58,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:23:58,554 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:23:58,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:23:58,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:23:58,554 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-12-14 07:23:58,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:23:58,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:23:58,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:23:58,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:23:58,756 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:23:58,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-14 07:24:01,361 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:24:01,504 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:24:01,504 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-14 07:24:01,509 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data/1973d2f2e/05ea3b7d6f57434897c124652a0c9f8a/FLAGf925e8d98 [2022-12-14 07:24:01,522 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data/1973d2f2e/05ea3b7d6f57434897c124652a0c9f8a [2022-12-14 07:24:01,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:24:01,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:24:01,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:24:01,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:24:01,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:24:01,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:24:01" (1/1) ... [2022-12-14 07:24:01,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a50e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:01, skipping insertion in model container [2022-12-14 07:24:01,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:24:01" (1/1) ... [2022-12-14 07:24:01,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:24:01,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:24:01,679 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:01,681 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:01,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:01,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:01,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:01,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:01,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:01,688 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:01,690 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:01,691 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:01,699 WARN L237 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_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-14 07:24:01,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:24:01,715 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 07:24:01,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4027a25a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:01, skipping insertion in model container [2022-12-14 07:24:01,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:24:01,716 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 07:24:01,717 INFO L158 Benchmark]: Toolchain (without parser) took 192.14ms. Allocated memory is still 115.3MB. Free memory was 82.0MB in the beginning and 71.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:24:01,718 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 115.3MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:24:01,718 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.51ms. Allocated memory is still 115.3MB. Free memory was 82.0MB in the beginning and 71.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:24:01,719 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 115.3MB. Free memory is still 88.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.51ms. Allocated memory is still 115.3MB. Free memory was 82.0MB in the beginning and 71.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 135]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:24:03,140 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:24:03,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:24:03,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:24:03,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:24:03,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:24:03,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:24:03,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:24:03,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:24:03,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:24:03,169 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:24:03,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:24:03,171 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:24:03,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:24:03,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:24:03,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:24:03,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:24:03,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:24:03,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:24:03,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:24:03,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:24:03,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:24:03,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:24:03,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:24:03,187 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:24:03,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:24:03,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:24:03,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:24:03,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:24:03,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:24:03,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:24:03,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:24:03,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:24:03,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:24:03,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:24:03,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:24:03,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:24:03,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:24:03,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:24:03,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:24:03,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:24:03,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 07:24:03,226 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:24:03,226 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:24:03,227 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:24:03,227 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:24:03,228 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:24:03,228 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:24:03,228 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:24:03,228 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:24:03,228 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:24:03,228 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:24:03,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:24:03,229 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:24:03,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:24:03,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:24:03,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:24:03,230 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:24:03,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:24:03,231 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:24:03,231 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 07:24:03,231 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 07:24:03,231 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:24:03,231 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:24:03,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:24:03,232 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 07:24:03,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:24:03,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:24:03,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:24:03,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:24:03,232 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 07:24:03,232 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 07:24:03,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:24:03,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 07:24:03,233 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_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-12-14 07:24:03,451 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:24:03,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:24:03,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:24:03,470 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:24:03,470 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:24:03,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-14 07:24:06,030 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:24:06,198 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:24:06,199 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-12-14 07:24:06,204 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data/6121c4b6f/0bb1525f5f6b48d28415d850214f4ebc/FLAG4dbfc0020 [2022-12-14 07:24:06,215 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/data/6121c4b6f/0bb1525f5f6b48d28415d850214f4ebc [2022-12-14 07:24:06,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:24:06,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:24:06,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:24:06,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:24:06,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:24:06,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350a9ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06, skipping insertion in model container [2022-12-14 07:24:06,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:24:06,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:24:06,357 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,358 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,360 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,361 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,363 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,364 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,364 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,365 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,366 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,367 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,373 WARN L237 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_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-14 07:24:06,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:24:06,390 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 07:24:06,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:24:06,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,402 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,404 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,407 WARN L237 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_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-14 07:24:06,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:24:06,413 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:24:06,423 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,424 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,424 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,425 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,426 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,426 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,427 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,427 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,428 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:24:06,429 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:24:06,432 WARN L237 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_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-12-14 07:24:06,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:24:06,446 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:24:06,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06 WrapperNode [2022-12-14 07:24:06,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:24:06,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:24:06,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:24:06,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:24:06,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,493 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 238 [2022-12-14 07:24:06,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:24:06,494 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:24:06,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:24:06,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:24:06,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,515 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:24:06,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:24:06,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:24:06,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:24:06,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (1/1) ... [2022-12-14 07:24:06,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:24:06,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:24:06,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:24:06,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:24:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:24:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 07:24:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:24:06,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 07:24:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 07:24:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 07:24:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:24:06,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:24:06,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 07:24:06,578 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 07:24:06,672 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:24:06,674 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:24:07,166 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:24:07,258 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:24:07,258 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 07:24:07,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:24:07 BoogieIcfgContainer [2022-12-14 07:24:07,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:24:07,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:24:07,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:24:07,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:24:07,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:24:06" (1/3) ... [2022-12-14 07:24:07,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735b296f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:24:07, skipping insertion in model container [2022-12-14 07:24:07,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:24:06" (2/3) ... [2022-12-14 07:24:07,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@735b296f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:24:07, skipping insertion in model container [2022-12-14 07:24:07,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:24:07" (3/3) ... [2022-12-14 07:24:07,266 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-12-14 07:24:07,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:24:07,279 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 07:24:07,279 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:24:07,340 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 07:24:07,368 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:24:07,381 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 234 transitions, 492 flow [2022-12-14 07:24:07,384 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 234 transitions, 492 flow [2022-12-14 07:24:07,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 234 transitions, 492 flow [2022-12-14 07:24:07,463 INFO L130 PetriNetUnfolder]: 18/231 cut-off events. [2022-12-14 07:24:07,463 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 07:24:07,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 231 events. 18/231 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 231 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 182. Up to 3 conditions per place. [2022-12-14 07:24:07,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2022-12-14 07:24:38,148 INFO L134 LiptonReduction]: Checked pairs total: 4253 [2022-12-14 07:24:38,148 INFO L136 LiptonReduction]: Total number of compositions: 252 [2022-12-14 07:24:38,156 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2022-12-14 07:24:38,232 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1565 states, 1237 states have (on average 4.568310428455942) internal successors, (5651), 1564 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:38,246 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:24:38,251 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@a910c97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:24:38,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-12-14 07:24:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 1565 states, 1237 states have (on average 4.568310428455942) internal successors, (5651), 1564 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:24:38,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:38,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:24:38,260 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 34609, now seen corresponding path program 1 times [2022-12-14 07:24:38,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055731969] [2022-12-14 07:24:38,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:38,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:38,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:38,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:38,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 07:24:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:24:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:38,472 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:24:38,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:24:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:38,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:38,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:38,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055731969] [2022-12-14 07:24:38,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055731969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:38,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:38,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:24:38,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752603028] [2022-12-14 07:24:38,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:38,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:24:38,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:24:38,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:38,521 INFO L87 Difference]: Start difference. First operand has 1565 states, 1237 states have (on average 4.568310428455942) internal successors, (5651), 1564 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:38,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:38,767 INFO L93 Difference]: Finished difference Result 1562 states and 5460 transitions. [2022-12-14 07:24:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:24:38,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 07:24:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:38,802 INFO L225 Difference]: With dead ends: 1562 [2022-12-14 07:24:38,802 INFO L226 Difference]: Without dead ends: 1562 [2022-12-14 07:24:38,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:38,806 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:38,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:24:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2022-12-14 07:24:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1562. [2022-12-14 07:24:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1237 states have (on average 4.413904607922393) internal successors, (5460), 1561 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5460 transitions. [2022-12-14 07:24:38,908 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5460 transitions. Word has length 2 [2022-12-14 07:24:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:38,909 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 5460 transitions. [2022-12-14 07:24:38,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5460 transitions. [2022-12-14 07:24:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:24:38,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:38,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:24:38,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:24:39,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:39,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash 34610, now seen corresponding path program 1 times [2022-12-14 07:24:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:39,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522637138] [2022-12-14 07:24:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:39,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:39,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:39,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 07:24:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:24:39,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:39,378 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:39,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:39,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:39,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:39,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522637138] [2022-12-14 07:24:39,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522637138] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:39,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:39,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:24:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728775125] [2022-12-14 07:24:39,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:39,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:24:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:24:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:39,405 INFO L87 Difference]: Start difference. First operand 1562 states and 5460 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:39,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:39,844 INFO L93 Difference]: Finished difference Result 3121 states and 10917 transitions. [2022-12-14 07:24:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:24:39,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 07:24:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:39,882 INFO L225 Difference]: With dead ends: 3121 [2022-12-14 07:24:39,883 INFO L226 Difference]: Without dead ends: 3121 [2022-12-14 07:24:39,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:39,884 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:39,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:24:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-12-14 07:24:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 1564. [2022-12-14 07:24:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1239 states have (on average 4.411622276029056) internal successors, (5466), 1563 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5466 transitions. [2022-12-14 07:24:39,968 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5466 transitions. Word has length 2 [2022-12-14 07:24:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:39,969 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 5466 transitions. [2022-12-14 07:24:39,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5466 transitions. [2022-12-14 07:24:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:24:39,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:39,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:24:39,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 07:24:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:40,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1079358, now seen corresponding path program 1 times [2022-12-14 07:24:40,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:40,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035255437] [2022-12-14 07:24:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:40,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:40,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:40,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:40,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 07:24:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:24:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:40,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:40,409 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-14 07:24:40,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-14 07:24:40,790 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-14 07:24:40,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 07:24:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:40,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:40,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:40,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035255437] [2022-12-14 07:24:40,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035255437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:40,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:40,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:24:40,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203668615] [2022-12-14 07:24:40,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:40,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:24:40,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:40,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:24:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:40,849 INFO L87 Difference]: Start difference. First operand 1564 states and 5466 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:41,166 INFO L93 Difference]: Finished difference Result 1283 states and 4344 transitions. [2022-12-14 07:24:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:24:41,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:24:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:41,172 INFO L225 Difference]: With dead ends: 1283 [2022-12-14 07:24:41,172 INFO L226 Difference]: Without dead ends: 1283 [2022-12-14 07:24:41,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:41,173 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:41,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:24:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-12-14 07:24:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1283. [2022-12-14 07:24:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1034 states have (on average 4.2011605415860735) internal successors, (4344), 1282 states have internal predecessors, (4344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 4344 transitions. [2022-12-14 07:24:41,240 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 4344 transitions. Word has length 3 [2022-12-14 07:24:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:41,240 INFO L495 AbstractCegarLoop]: Abstraction has 1283 states and 4344 transitions. [2022-12-14 07:24:41,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 4344 transitions. [2022-12-14 07:24:41,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:24:41,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:41,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:24:41,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 07:24:41,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:41,442 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1079359, now seen corresponding path program 1 times [2022-12-14 07:24:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:41,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479447090] [2022-12-14 07:24:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:41,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:41,445 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:41,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 07:24:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:41,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:24:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:41,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:41,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:41,650 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 07:24:41,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-14 07:24:41,687 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 07:24:41,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 90 treesize of output 89 [2022-12-14 07:24:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:41,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 14 [2022-12-14 07:24:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:41,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:41,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:41,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479447090] [2022-12-14 07:24:41,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479447090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:41,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:41,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:24:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675160631] [2022-12-14 07:24:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:24:41,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:24:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:24:41,776 INFO L87 Difference]: Start difference. First operand 1283 states and 4344 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:41,963 INFO L93 Difference]: Finished difference Result 1002 states and 3222 transitions. [2022-12-14 07:24:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:24:41,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:24:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:41,967 INFO L225 Difference]: With dead ends: 1002 [2022-12-14 07:24:41,967 INFO L226 Difference]: Without dead ends: 1002 [2022-12-14 07:24:41,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:24:41,968 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:41,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:24:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-12-14 07:24:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-12-14 07:24:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 829 states have (on average 3.8866103739445115) internal successors, (3222), 1001 states have internal predecessors, (3222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3222 transitions. [2022-12-14 07:24:41,986 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3222 transitions. Word has length 3 [2022-12-14 07:24:41,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:41,986 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 3222 transitions. [2022-12-14 07:24:41,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3222 transitions. [2022-12-14 07:24:41,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:24:41,987 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:41,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:24:41,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 07:24:42,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:42,189 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:42,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1077853, now seen corresponding path program 1 times [2022-12-14 07:24:42,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:42,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664058048] [2022-12-14 07:24:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:42,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:42,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:42,196 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:42,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 07:24:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:42,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:24:42,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:42,390 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:42,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:42,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:42,607 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664058048] [2022-12-14 07:24:42,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664058048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18341850] [2022-12-14 07:24:42,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:42,607 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:24:42,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:24:42,609 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:24:42,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 07:24:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:42,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:24:42,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:42,790 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:42,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:42,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:42,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18341850] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:42,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035903978] [2022-12-14 07:24:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:42,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:42,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:24:42,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:24:42,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:24:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:42,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:24:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:43,036 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:43,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:43,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:43,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035903978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:43,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:24:43,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 07:24:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770785999] [2022-12-14 07:24:43,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:24:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:24:43,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:24:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:24:43,188 INFO L87 Difference]: Start difference. First operand 1002 states and 3222 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:45,315 INFO L93 Difference]: Finished difference Result 3993 states and 12867 transitions. [2022-12-14 07:24:45,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:24:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:24:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:45,331 INFO L225 Difference]: With dead ends: 3993 [2022-12-14 07:24:45,331 INFO L226 Difference]: Without dead ends: 3993 [2022-12-14 07:24:45,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:24:45,332 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 368 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:45,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 15 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 07:24:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2022-12-14 07:24:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 1008. [2022-12-14 07:24:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 835 states have (on average 3.873053892215569) internal successors, (3234), 1007 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 3234 transitions. [2022-12-14 07:24:45,378 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 3234 transitions. Word has length 3 [2022-12-14 07:24:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:45,378 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 3234 transitions. [2022-12-14 07:24:45,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 3234 transitions. [2022-12-14 07:24:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:24:45,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:45,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:24:45,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 07:24:45,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-14 07:24:45,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:24:45,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:45,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1037287893, now seen corresponding path program 1 times [2022-12-14 07:24:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:45,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405910217] [2022-12-14 07:24:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:45,984 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:45,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:45,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 07:24:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:24:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:46,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:46,137 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-14 07:24:46,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-14 07:24:46,384 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-14 07:24:46,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 07:24:46,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:46,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:46,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:46,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405910217] [2022-12-14 07:24:46,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405910217] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:46,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:46,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:24:46,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183542948] [2022-12-14 07:24:46,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:46,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:24:46,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:46,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:24:46,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:46,482 INFO L87 Difference]: Start difference. First operand 1008 states and 3234 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:46,705 INFO L93 Difference]: Finished difference Result 961 states and 3100 transitions. [2022-12-14 07:24:46,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:24:46,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:24:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:46,711 INFO L225 Difference]: With dead ends: 961 [2022-12-14 07:24:46,711 INFO L226 Difference]: Without dead ends: 961 [2022-12-14 07:24:46,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:24:46,712 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:46,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:24:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-12-14 07:24:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 961. [2022-12-14 07:24:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 808 states have (on average 3.8366336633663365) internal successors, (3100), 960 states have internal predecessors, (3100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 3100 transitions. [2022-12-14 07:24:46,727 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 3100 transitions. Word has length 5 [2022-12-14 07:24:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:46,727 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 3100 transitions. [2022-12-14 07:24:46,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 3100 transitions. [2022-12-14 07:24:46,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:24:46,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:46,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:24:46,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 07:24:46,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:46,929 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:46,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:46,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1037287894, now seen corresponding path program 1 times [2022-12-14 07:24:46,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:46,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732918700] [2022-12-14 07:24:46,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:46,936 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:46,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 07:24:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:24:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:47,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:47,110 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 07:24:47,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-14 07:24:47,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 07:24:47,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:47,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 14 [2022-12-14 07:24:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:47,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:47,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:47,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732918700] [2022-12-14 07:24:47,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732918700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:47,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:47,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:24:47,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403478547] [2022-12-14 07:24:47,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:47,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:24:47,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:47,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:24:47,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:24:47,210 INFO L87 Difference]: Start difference. First operand 961 states and 3100 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:47,414 INFO L93 Difference]: Finished difference Result 914 states and 2966 transitions. [2022-12-14 07:24:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:24:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:24:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:47,419 INFO L225 Difference]: With dead ends: 914 [2022-12-14 07:24:47,419 INFO L226 Difference]: Without dead ends: 914 [2022-12-14 07:24:47,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:24:47,420 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:47,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:24:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2022-12-14 07:24:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 914. [2022-12-14 07:24:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 781 states have (on average 3.797695262483995) internal successors, (2966), 913 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2966 transitions. [2022-12-14 07:24:47,434 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2966 transitions. Word has length 5 [2022-12-14 07:24:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:47,434 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 2966 transitions. [2022-12-14 07:24:47,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:47,435 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2966 transitions. [2022-12-14 07:24:47,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:24:47,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:47,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:24:47,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 07:24:47,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:47,636 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2091146500, now seen corresponding path program 1 times [2022-12-14 07:24:47,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:47,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538961014] [2022-12-14 07:24:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:47,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:47,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:47,642 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:47,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 07:24:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:47,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:24:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:47,779 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:24:47,780 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:47,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538961014] [2022-12-14 07:24:47,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538961014] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:47,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:47,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:24:47,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777464479] [2022-12-14 07:24:47,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:47,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:24:47,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:24:47,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:24:47,781 INFO L87 Difference]: Start difference. First operand 914 states and 2966 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:48,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:48,215 INFO L93 Difference]: Finished difference Result 981 states and 3116 transitions. [2022-12-14 07:24:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:24:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:24:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:48,218 INFO L225 Difference]: With dead ends: 981 [2022-12-14 07:24:48,218 INFO L226 Difference]: Without dead ends: 973 [2022-12-14 07:24:48,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:24:48,219 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:48,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:24:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-12-14 07:24:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 972. [2022-12-14 07:24:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 835 states have (on average 3.7077844311377244) internal successors, (3096), 971 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 3096 transitions. [2022-12-14 07:24:48,235 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 3096 transitions. Word has length 6 [2022-12-14 07:24:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:48,235 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 3096 transitions. [2022-12-14 07:24:48,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 3096 transitions. [2022-12-14 07:24:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:24:48,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:48,236 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 07:24:48,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 07:24:48,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:48,438 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:24:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2050456050, now seen corresponding path program 2 times [2022-12-14 07:24:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:24:48,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1388631371] [2022-12-14 07:24:48,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:24:48,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:24:48,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:24:48,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:24:48,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 07:24:48,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:24:48,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:24:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:24:48,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:48,693 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:48,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:48,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:49,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:24:49,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1388631371] [2022-12-14 07:24:49,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1388631371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:49,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1813595202] [2022-12-14 07:24:49,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:24:49,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:24:49,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:24:49,305 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:24:49,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 07:24:49,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:24:49,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:24:49,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:24:49,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:49,540 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:49,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:49,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:50,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1813595202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:50,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507230604] [2022-12-14 07:24:50,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:24:50,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:50,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:24:50,360 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:24:50,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:24:50,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:24:50,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:24:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:24:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:50,536 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:24:50,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:24:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:50,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:50,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507230604] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:24:50,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:24:50,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 07:24:50,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151728] [2022-12-14 07:24:50,745 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:24:50,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:24:50,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:24:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:24:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:24:50,746 INFO L87 Difference]: Start difference. First operand 972 states and 3096 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:24:53,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:24:55,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:24:58,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:00,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:02,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:04,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:06,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:07,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:08,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:10,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:25:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:16,667 INFO L93 Difference]: Finished difference Result 9577 states and 30692 transitions. [2022-12-14 07:25:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:25:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:25:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:16,703 INFO L225 Difference]: With dead ends: 9577 [2022-12-14 07:25:16,703 INFO L226 Difference]: Without dead ends: 9577 [2022-12-14 07:25:16,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:25:16,704 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1295 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1295 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:16,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1295 Valid, 99 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1239 Invalid, 2 Unknown, 0 Unchecked, 24.1s Time] [2022-12-14 07:25:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9577 states. [2022-12-14 07:25:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9577 to 990. [2022-12-14 07:25:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 853 states have (on average 3.6740914419695194) internal successors, (3134), 989 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 3134 transitions. [2022-12-14 07:25:16,775 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 3134 transitions. Word has length 6 [2022-12-14 07:25:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:16,775 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 3134 transitions. [2022-12-14 07:25:16,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 3134 transitions. [2022-12-14 07:25:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:25:16,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:16,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:16,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 07:25:16,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 07:25:17,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 07:25:17,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:17,378 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:25:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 401277272, now seen corresponding path program 1 times [2022-12-14 07:25:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:25:17,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221592658] [2022-12-14 07:25:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:17,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:25:17,380 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:25:17,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 07:25:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:25:17,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:17,523 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 07:25:17,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-14 07:25:17,548 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:25:17,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 07:25:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:17,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:25:17,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:25:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221592658] [2022-12-14 07:25:17,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221592658] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:17,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:17,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:25:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689658631] [2022-12-14 07:25:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:25:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:25:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:25:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:17,559 INFO L87 Difference]: Start difference. First operand 990 states and 3134 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:17,724 INFO L93 Difference]: Finished difference Result 925 states and 2948 transitions. [2022-12-14 07:25:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:25:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:25:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:17,727 INFO L225 Difference]: With dead ends: 925 [2022-12-14 07:25:17,727 INFO L226 Difference]: Without dead ends: 925 [2022-12-14 07:25:17,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:25:17,728 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:17,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:25:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-12-14 07:25:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 925. [2022-12-14 07:25:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 817 states have (on average 3.608323133414933) internal successors, (2948), 924 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2948 transitions. [2022-12-14 07:25:17,754 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2948 transitions. Word has length 7 [2022-12-14 07:25:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:17,755 INFO L495 AbstractCegarLoop]: Abstraction has 925 states and 2948 transitions. [2022-12-14 07:25:17,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2948 transitions. [2022-12-14 07:25:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:25:17,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:17,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:17,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 07:25:17,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:17,956 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:25:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 401277273, now seen corresponding path program 1 times [2022-12-14 07:25:17,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:25:17,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412705969] [2022-12-14 07:25:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:17,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:17,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:25:17,959 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:25:17,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 07:25:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:18,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:25:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:18,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:25:18,141 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 07:25:18,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 07:25:18,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2022-12-14 07:25:18,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:25:18,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 12 treesize of output 14 [2022-12-14 07:25:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:18,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:25:18,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:25:18,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412705969] [2022-12-14 07:25:18,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412705969] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:18,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:18,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:25:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993293734] [2022-12-14 07:25:18,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:18,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:25:18,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:25:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:25:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:25:18,257 INFO L87 Difference]: Start difference. First operand 925 states and 2948 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:18,469 INFO L93 Difference]: Finished difference Result 860 states and 2762 transitions. [2022-12-14 07:25:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:25:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:25:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:18,473 INFO L225 Difference]: With dead ends: 860 [2022-12-14 07:25:18,473 INFO L226 Difference]: Without dead ends: 860 [2022-12-14 07:25:18,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:25:18,474 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:18,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:25:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-12-14 07:25:18,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2022-12-14 07:25:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 781 states have (on average 3.536491677336748) internal successors, (2762), 859 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2762 transitions. [2022-12-14 07:25:18,486 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2762 transitions. Word has length 7 [2022-12-14 07:25:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:18,486 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 2762 transitions. [2022-12-14 07:25:18,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:18,486 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2762 transitions. [2022-12-14 07:25:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:25:18,487 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:18,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:18,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 07:25:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:18,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:25:18,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash -819676497, now seen corresponding path program 1 times [2022-12-14 07:25:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:25:18,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764390317] [2022-12-14 07:25:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:18,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:25:18,689 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:25:18,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 07:25:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:25:18,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:18,827 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:25:18,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:25:18,847 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 07:25:18,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 07:25:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:25:18,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:25:18,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:25:18,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764390317] [2022-12-14 07:25:18,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764390317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:25:18,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:25:18,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:25:18,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615042354] [2022-12-14 07:25:18,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:25:18,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:25:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:25:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:25:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:25:18,865 INFO L87 Difference]: Start difference. First operand 860 states and 2762 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:19,048 INFO L93 Difference]: Finished difference Result 594 states and 1863 transitions. [2022-12-14 07:25:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:25:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:25:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:19,051 INFO L225 Difference]: With dead ends: 594 [2022-12-14 07:25:19,051 INFO L226 Difference]: Without dead ends: 594 [2022-12-14 07:25:19,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:25:19,052 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:19,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:25:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-12-14 07:25:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2022-12-14 07:25:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 554 states have (on average 3.362815884476534) internal successors, (1863), 593 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1863 transitions. [2022-12-14 07:25:19,064 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1863 transitions. Word has length 7 [2022-12-14 07:25:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:19,064 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 1863 transitions. [2022-12-14 07:25:19,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:25:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1863 transitions. [2022-12-14 07:25:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:25:19,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:19,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:19,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 07:25:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:19,265 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:25:19,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash -819676496, now seen corresponding path program 1 times [2022-12-14 07:25:19,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:25:19,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1985397001] [2022-12-14 07:25:19,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:19,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:25:19,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:25:19,269 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:25:19,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 07:25:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:25:19,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:19,503 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:25:19,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:25:19,623 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:25:19,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:25:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:25:19,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 16 [2022-12-14 07:25:19,721 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:25:19,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-14 07:25:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:19,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:25:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:22,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:25:22,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1985397001] [2022-12-14 07:25:22,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1985397001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:25:22,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018142161] [2022-12-14 07:25:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:22,855 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:25:22,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:25:22,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:25:22,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 07:25:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:23,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:25:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:23,145 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:25:23,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:25:23,239 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:25:23,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:25:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:25:23,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 16 [2022-12-14 07:25:23,371 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:25:23,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-14 07:25:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:23,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:25:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:29,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2018142161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:25:29,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903246029] [2022-12-14 07:25:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:25:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:25:29,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:25:29,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 07:25:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:25:29,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:29,723 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:25:29,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:25:29,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:25:29,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 16 [2022-12-14 07:25:29,858 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:25:29,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-14 07:25:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:25:32,760 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:25:32,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-12-14 07:25:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:25:35,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903246029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:25:35,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:25:35,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-12-14 07:25:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410285153] [2022-12-14 07:25:35,767 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:25:35,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:25:35,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:25:35,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:25:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=106, Unknown=3, NotChecked=0, Total=156 [2022-12-14 07:25:35,770 INFO L87 Difference]: Start difference. First operand 594 states and 1863 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:26:31,194 WARN L233 SmtUtils]: Spent 55.23s on a formula simplification. DAG size of input: 87 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:26:44,166 WARN L233 SmtUtils]: Spent 9.88s on a formula simplification. DAG size of input: 66 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:26:55,652 WARN L233 SmtUtils]: Spent 11.32s on a formula simplification. DAG size of input: 68 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:27:54,689 WARN L233 SmtUtils]: Spent 56.85s on a formula simplification. DAG size of input: 76 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:19,270 WARN L233 SmtUtils]: Spent 20.50s on a formula simplification. DAG size of input: 70 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:28:47,811 WARN L233 SmtUtils]: Spent 27.79s on a formula simplification. DAG size of input: 85 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:29:11,769 WARN L233 SmtUtils]: Spent 20.70s on a formula simplification. DAG size of input: 59 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:29:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:14,568 INFO L93 Difference]: Finished difference Result 1548 states and 4873 transitions. [2022-12-14 07:29:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:29:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:29:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:14,573 INFO L225 Difference]: With dead ends: 1548 [2022-12-14 07:29:14,573 INFO L226 Difference]: Without dead ends: 1548 [2022-12-14 07:29:14,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 227.6s TimeCoverageRelationStatistics Valid=115, Invalid=299, Unknown=6, NotChecked=0, Total=420 [2022-12-14 07:29:14,574 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 312 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:14,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 33 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-14 07:29:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2022-12-14 07:29:14,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 822. [2022-12-14 07:29:14,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 782 states have (on average 3.4616368286445014) internal successors, (2707), 821 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:14,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2707 transitions. [2022-12-14 07:29:14,588 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2707 transitions. Word has length 7 [2022-12-14 07:29:14,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:14,588 INFO L495 AbstractCegarLoop]: Abstraction has 822 states and 2707 transitions. [2022-12-14 07:29:14,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:14,588 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2707 transitions. [2022-12-14 07:29:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 07:29:14,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:14,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:14,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 07:29:14,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 07:29:14,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 07:29:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:15,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:29:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:15,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1722502873, now seen corresponding path program 1 times [2022-12-14 07:29:15,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:29:15,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114195981] [2022-12-14 07:29:15,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:15,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:15,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:29:15,198 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:29:15,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 07:29:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:15,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:29:15,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:29:15,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:15,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:29:15,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114195981] [2022-12-14 07:29:15,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114195981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:15,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:15,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:29:15,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054657897] [2022-12-14 07:29:15,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:29:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:15,352 INFO L87 Difference]: Start difference. First operand 822 states and 2707 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:15,639 INFO L93 Difference]: Finished difference Result 818 states and 2662 transitions. [2022-12-14 07:29:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 07:29:15,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:15,643 INFO L225 Difference]: With dead ends: 818 [2022-12-14 07:29:15,643 INFO L226 Difference]: Without dead ends: 818 [2022-12-14 07:29:15,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:15,643 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:15,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:29:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-12-14 07:29:15,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 818. [2022-12-14 07:29:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 772 states have (on average 3.448186528497409) internal successors, (2662), 817 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2662 transitions. [2022-12-14 07:29:15,655 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2662 transitions. Word has length 9 [2022-12-14 07:29:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:15,655 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 2662 transitions. [2022-12-14 07:29:15,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2662 transitions. [2022-12-14 07:29:15,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:29:15,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:15,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:15,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 07:29:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:15,858 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:29:15,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:15,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1557991539, now seen corresponding path program 1 times [2022-12-14 07:29:15,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:29:15,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230292109] [2022-12-14 07:29:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:15,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:15,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:29:15,864 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:29:15,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 07:29:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:15,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:29:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:16,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 07:29:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:16,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:16,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:29:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230292109] [2022-12-14 07:29:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230292109] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:16,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:16,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:29:16,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645845947] [2022-12-14 07:29:16,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:16,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:29:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:29:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:29:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:29:16,037 INFO L87 Difference]: Start difference. First operand 818 states and 2662 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:16,260 INFO L93 Difference]: Finished difference Result 632 states and 1999 transitions. [2022-12-14 07:29:16,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:29:16,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:29:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:16,263 INFO L225 Difference]: With dead ends: 632 [2022-12-14 07:29:16,263 INFO L226 Difference]: Without dead ends: 632 [2022-12-14 07:29:16,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:29:16,263 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:16,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:29:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-12-14 07:29:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2022-12-14 07:29:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 607 states have (on average 3.2932454695222404) internal successors, (1999), 631 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1999 transitions. [2022-12-14 07:29:16,272 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1999 transitions. Word has length 10 [2022-12-14 07:29:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:16,272 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 1999 transitions. [2022-12-14 07:29:16,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1999 transitions. [2022-12-14 07:29:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:29:16,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:16,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:16,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 07:29:16,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:16,473 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:29:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1557991540, now seen corresponding path program 1 times [2022-12-14 07:29:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:29:16,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116645914] [2022-12-14 07:29:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:16,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:16,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:29:16,475 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:29:16,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 07:29:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:29:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:16,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:16,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:29:16,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116645914] [2022-12-14 07:29:16,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116645914] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:16,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:16,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:29:16,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490721447] [2022-12-14 07:29:16,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:16,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:29:16,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:29:16,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:29:16,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:16,575 INFO L87 Difference]: Start difference. First operand 632 states and 1999 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:16,845 INFO L93 Difference]: Finished difference Result 694 states and 2161 transitions. [2022-12-14 07:29:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:29:16,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:29:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:16,847 INFO L225 Difference]: With dead ends: 694 [2022-12-14 07:29:16,847 INFO L226 Difference]: Without dead ends: 665 [2022-12-14 07:29:16,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:29:16,848 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:16,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 4 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:29:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-12-14 07:29:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-12-14 07:29:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 637 states have (on average 3.2888540031397175) internal successors, (2095), 664 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 2095 transitions. [2022-12-14 07:29:16,861 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 2095 transitions. Word has length 10 [2022-12-14 07:29:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:16,861 INFO L495 AbstractCegarLoop]: Abstraction has 665 states and 2095 transitions. [2022-12-14 07:29:16,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 2095 transitions. [2022-12-14 07:29:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:29:16,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:16,861 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 07:29:16,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 07:29:17,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:17,063 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:29:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1218703301, now seen corresponding path program 2 times [2022-12-14 07:29:17,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:29:17,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013325731] [2022-12-14 07:29:17,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:29:17,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:29:17,068 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:29:17,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 07:29:17,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:29:17,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:29:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:29:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:17,327 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:29:17,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:29:17,498 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 07:29:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 07:29:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:29:17,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 16 [2022-12-14 07:29:17,656 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 07:29:17,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 13 [2022-12-14 07:29:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:29:17,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:29:17,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:29:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013325731] [2022-12-14 07:29:17,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013325731] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:17,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:29:17,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:29:17,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743188578] [2022-12-14 07:29:17,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:17,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:29:17,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:29:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:29:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:29:17,722 INFO L87 Difference]: Start difference. First operand 665 states and 2095 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:29:18,002 INFO L93 Difference]: Finished difference Result 429 states and 1349 transitions. [2022-12-14 07:29:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:29:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:29:18,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:29:18,004 INFO L225 Difference]: With dead ends: 429 [2022-12-14 07:29:18,004 INFO L226 Difference]: Without dead ends: 429 [2022-12-14 07:29:18,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:29:18,005 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:29:18,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:29:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-12-14 07:29:18,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 255. [2022-12-14 07:29:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 248 states have (on average 2.975806451612903) internal successors, (738), 254 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 738 transitions. [2022-12-14 07:29:18,011 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 738 transitions. Word has length 10 [2022-12-14 07:29:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:29:18,011 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 738 transitions. [2022-12-14 07:29:18,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 738 transitions. [2022-12-14 07:29:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:29:18,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:29:18,011 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1] [2022-12-14 07:29:18,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 07:29:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:18,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:29:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:29:18,214 INFO L85 PathProgramCache]: Analyzing trace with hash -422571538, now seen corresponding path program 1 times [2022-12-14 07:29:18,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:29:18,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258508906] [2022-12-14 07:29:18,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:18,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:29:18,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:29:18,218 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:29:18,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 07:29:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:18,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:29:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:18,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:29:18,771 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:18,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:29:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:21,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:29:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258508906] [2022-12-14 07:29:21,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258508906] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:29:21,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2070127267] [2022-12-14 07:29:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:21,035 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:29:21,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:29:21,036 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:29:21,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 07:29:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:21,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:29:21,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:21,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:29:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:21,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:29:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:22,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2070127267] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:29:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398004710] [2022-12-14 07:29:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:29:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:29:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:29:22,508 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:29:22,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 07:29:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:29:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:29:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:29:22,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:29:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:22,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:29:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:29:23,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398004710] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:29:23,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:29:23,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 27 [2022-12-14 07:29:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246203826] [2022-12-14 07:29:23,142 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:29:23,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 07:29:23,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:29:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 07:29:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:29:23,143 INFO L87 Difference]: Start difference. First operand 255 states and 738 transitions. Second operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:29:28,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:29:30,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:29:32,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:29:34,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:29:37,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:29:39,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:29:42,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:30:04,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:04,417 INFO L93 Difference]: Finished difference Result 3995 states and 12271 transitions. [2022-12-14 07:30:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 07:30:04,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 07:30:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:04,425 INFO L225 Difference]: With dead ends: 3995 [2022-12-14 07:30:04,426 INFO L226 Difference]: Without dead ends: 3995 [2022-12-14 07:30:04,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=690, Invalid=1202, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:30:04,426 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2617 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 74 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:04,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2617 Valid, 363 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 3064 Invalid, 7 Unknown, 0 Unchecked, 26.6s Time] [2022-12-14 07:30:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-12-14 07:30:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 272. [2022-12-14 07:30:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 265 states have (on average 2.8754716981132074) internal successors, (762), 271 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 762 transitions. [2022-12-14 07:30:04,445 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 762 transitions. Word has length 11 [2022-12-14 07:30:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:04,445 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 762 transitions. [2022-12-14 07:30:04,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:04,445 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 762 transitions. [2022-12-14 07:30:04,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:30:04,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:04,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:04,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 07:30:04,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 07:30:04,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-12-14 07:30:05,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:30:05,049 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:30:05,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:05,050 INFO L85 PathProgramCache]: Analyzing trace with hash -424612998, now seen corresponding path program 1 times [2022-12-14 07:30:05,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:30:05,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072666284] [2022-12-14 07:30:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:30:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:30:05,054 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:30:05,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 07:30:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:05,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:30:05,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:05,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:30:05,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:30:05,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072666284] [2022-12-14 07:30:05,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072666284] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:30:05,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:30:05,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:30:05,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13629846] [2022-12-14 07:30:05,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:30:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:30:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:30:05,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:30:05,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:30:05,375 INFO L87 Difference]: Start difference. First operand 272 states and 762 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:05,753 INFO L93 Difference]: Finished difference Result 353 states and 975 transitions. [2022-12-14 07:30:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:30:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 07:30:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:05,755 INFO L225 Difference]: With dead ends: 353 [2022-12-14 07:30:05,755 INFO L226 Difference]: Without dead ends: 272 [2022-12-14 07:30:05,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:30:05,755 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:05,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 9 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:30:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-14 07:30:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-12-14 07:30:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 265 states have (on average 2.871698113207547) internal successors, (761), 271 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 761 transitions. [2022-12-14 07:30:05,759 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 761 transitions. Word has length 11 [2022-12-14 07:30:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:05,759 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 761 transitions. [2022-12-14 07:30:05,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 761 transitions. [2022-12-14 07:30:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:30:05,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:05,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:30:05,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 07:30:05,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:30:05,961 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:30:05,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash -647477809, now seen corresponding path program 1 times [2022-12-14 07:30:05,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:30:05,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349273142] [2022-12-14 07:30:05,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:05,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:30:05,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:30:05,967 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:30:05,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 07:30:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:30:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:06,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:30:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:06,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:07,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:30:07,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349273142] [2022-12-14 07:30:07,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349273142] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:07,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377449200] [2022-12-14 07:30:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:30:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:30:07,609 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:30:07,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 07:30:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:30:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:07,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:30:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:08,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:08,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [377449200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303343772] [2022-12-14 07:30:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:30:08,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:08,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:08,879 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:30:08,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 07:30:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:30:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:30:08,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:08,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:30:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:09,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:30:09,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303343772] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:09,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:30:09,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 07:30:09,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470925648] [2022-12-14 07:30:09,626 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:30:09,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:30:09,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:30:09,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:30:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:30:09,627 INFO L87 Difference]: Start difference. First operand 272 states and 761 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:30:14,079 INFO L93 Difference]: Finished difference Result 582 states and 1711 transitions. [2022-12-14 07:30:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:30:14,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:30:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:30:14,082 INFO L225 Difference]: With dead ends: 582 [2022-12-14 07:30:14,082 INFO L226 Difference]: Without dead ends: 582 [2022-12-14 07:30:14,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:30:14,082 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 234 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:30:14,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 24 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 07:30:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-12-14 07:30:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 417. [2022-12-14 07:30:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 410 states have (on average 2.9853658536585366) internal successors, (1224), 416 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1224 transitions. [2022-12-14 07:30:14,088 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1224 transitions. Word has length 12 [2022-12-14 07:30:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:30:14,088 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 1224 transitions. [2022-12-14 07:30:14,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1224 transitions. [2022-12-14 07:30:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:30:14,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:30:14,089 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-12-14 07:30:14,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 07:30:14,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-14 07:30:14,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-14 07:30:14,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:14,691 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:30:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:30:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash 7947133, now seen corresponding path program 3 times [2022-12-14 07:30:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:30:14,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237321215] [2022-12-14 07:30:14,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:30:14,693 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:30:14,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:30:14,694 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:30:14,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 07:30:14,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 07:30:14,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:30:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 07:30:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:15,069 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:30:15,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:30:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:15,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:19,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:30:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237321215] [2022-12-14 07:30:19,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237321215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212006133] [2022-12-14 07:30:19,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:30:19,645 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:30:19,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:30:19,646 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:30:19,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 07:30:20,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 07:30:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:30:20,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:30:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:20,730 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:30:20,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:30:21,147 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:21,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:25,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [212006133] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:25,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218697504] [2022-12-14 07:30:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:30:25,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:30:25,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:30:25,927 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:30:25,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 07:30:29,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 07:30:29,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:30:29,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:30:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:30:29,316 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:30:29,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:30:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:29,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:30:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:30:35,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218697504] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:30:35,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:30:35,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 48 [2022-12-14 07:30:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629148191] [2022-12-14 07:30:35,325 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:30:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 07:30:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:30:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 07:30:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=1791, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 07:30:35,327 INFO L87 Difference]: Start difference. First operand 417 states and 1224 transitions. Second operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:30:47,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:30:49,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:30:51,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:30:53,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:30:55,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:30:57,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:30:59,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:01,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:03,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:05,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:07,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:09,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:11,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:13,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:15,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:17,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:19,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:21,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:23,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:25,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:27,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:28,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:30,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:32,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:34,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:36,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:38,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:40,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:31:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:31:59,504 INFO L93 Difference]: Finished difference Result 2721 states and 8305 transitions. [2022-12-14 07:31:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 07:31:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 07:31:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:31:59,510 INFO L225 Difference]: With dead ends: 2721 [2022-12-14 07:31:59,510 INFO L226 Difference]: Without dead ends: 2721 [2022-12-14 07:31:59,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=1100, Invalid=2560, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 07:31:59,511 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3422 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 4499 mSolverCounterSat, 290 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 4499 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:31:59,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3422 Valid, 540 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 4499 Invalid, 27 Unknown, 0 Unchecked, 67.6s Time] [2022-12-14 07:31:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-12-14 07:31:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 430. [2022-12-14 07:31:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 423 states have (on average 2.955082742316785) internal successors, (1250), 429 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1250 transitions. [2022-12-14 07:31:59,528 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1250 transitions. Word has length 13 [2022-12-14 07:31:59,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:31:59,528 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 1250 transitions. [2022-12-14 07:31:59,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:31:59,528 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1250 transitions. [2022-12-14 07:31:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:31:59,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:31:59,529 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:31:59,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-14 07:31:59,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-12-14 07:31:59,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 07:32:00,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:00,133 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:32:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:00,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2032183110, now seen corresponding path program 2 times [2022-12-14 07:32:00,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:00,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001512195] [2022-12-14 07:32:00,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:32:00,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:32:00,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:00,139 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:32:00,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 07:32:00,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:32:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:32:00,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:00,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:32:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:32:00,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:32:00,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:32:00,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001512195] [2022-12-14 07:32:00,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001512195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:32:00,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:32:00,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:32:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056864549] [2022-12-14 07:32:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:32:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:32:00,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:32:00,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:32:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:32:00,452 INFO L87 Difference]: Start difference. First operand 430 states and 1250 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:32:00,708 INFO L93 Difference]: Finished difference Result 366 states and 1048 transitions. [2022-12-14 07:32:00,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:32:00,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 07:32:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:32:00,710 INFO L225 Difference]: With dead ends: 366 [2022-12-14 07:32:00,710 INFO L226 Difference]: Without dead ends: 366 [2022-12-14 07:32:00,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:32:00,711 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:32:00,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:32:00,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-12-14 07:32:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 221. [2022-12-14 07:32:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 218 states have (on average 2.68348623853211) internal successors, (585), 220 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 585 transitions. [2022-12-14 07:32:00,716 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 585 transitions. Word has length 15 [2022-12-14 07:32:00,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:32:00,716 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 585 transitions. [2022-12-14 07:32:00,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:00,717 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 585 transitions. [2022-12-14 07:32:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:32:00,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:32:00,717 INFO L195 NwaCegarLoop]: trace histogram [18, 1, 1, 1] [2022-12-14 07:32:00,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-12-14 07:32:00,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:32:00,919 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:32:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:32:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1022824206, now seen corresponding path program 2 times [2022-12-14 07:32:00,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:32:00,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302799911] [2022-12-14 07:32:00,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:32:00,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:32:00,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:32:00,924 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:32:00,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 07:32:01,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:32:01,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:01,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:32:01,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:01,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:32:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:02,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:10,831 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:10,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:32:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302799911] [2022-12-14 07:32:10,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302799911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:10,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110473114] [2022-12-14 07:32:10,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:32:10,831 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:32:10,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:32:10,832 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:32:10,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 07:32:11,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:32:11,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:11,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:32:11,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:11,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:32:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:11,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:12,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110473114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:12,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404715315] [2022-12-14 07:32:12,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:32:12,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:32:12,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:32:12,754 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:32:12,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 07:32:12,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:32:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:32:12,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 07:32:12,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:32:12,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 07:32:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:13,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:32:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:32:14,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404715315] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:32:14,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:32:14,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 39 [2022-12-14 07:32:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946591518] [2022-12-14 07:32:14,348 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:32:14,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 07:32:14,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:32:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 07:32:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1122, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 07:32:14,349 INFO L87 Difference]: Start difference. First operand 221 states and 585 transitions. Second operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:32:35,978 WARN L233 SmtUtils]: Spent 11.03s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:32:38,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:40,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:42,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:44,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:46,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:48,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:50,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:52,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:54,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:56,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:32:58,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:00,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:02,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:04,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:06,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:08,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:10,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:12,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:33:24,638 WARN L233 SmtUtils]: Spent 10.87s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:33:35,696 WARN L233 SmtUtils]: Spent 9.17s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:33:44,534 WARN L233 SmtUtils]: Spent 7.23s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:34:03,017 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:34:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:39,582 INFO L93 Difference]: Finished difference Result 5841 states and 17745 transitions. [2022-12-14 07:34:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 07:34:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 07:34:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:39,592 INFO L225 Difference]: With dead ends: 5841 [2022-12-14 07:34:39,592 INFO L226 Difference]: Without dead ends: 5841 [2022-12-14 07:34:39,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 86.2s TimeCoverageRelationStatistics Valid=1158, Invalid=2148, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 07:34:39,593 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 7797 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 8382 mSolverCounterSat, 182 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7797 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 8581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 8382 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:39,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7797 Valid, 1080 Invalid, 8581 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [182 Valid, 8382 Invalid, 17 Unknown, 0 Unchecked, 67.5s Time] [2022-12-14 07:34:39,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-12-14 07:34:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 261. [2022-12-14 07:34:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 258 states have (on average 2.5) internal successors, (645), 260 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 645 transitions. [2022-12-14 07:34:39,625 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 645 transitions. Word has length 21 [2022-12-14 07:34:39,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:39,625 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 645 transitions. [2022-12-14 07:34:39,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 645 transitions. [2022-12-14 07:34:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:34:39,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:39,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:39,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 07:34:39,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-12-14 07:34:40,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-14 07:34:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:34:40,228 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:34:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2122214129, now seen corresponding path program 1 times [2022-12-14 07:34:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:34:40,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563947131] [2022-12-14 07:34:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:34:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:34:40,235 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:34:40,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 07:34:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:40,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:34:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:34:40,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:34:40,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:34:40,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563947131] [2022-12-14 07:34:40,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563947131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:40,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:40,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:34:40,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898032425] [2022-12-14 07:34:40,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:40,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:34:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:34:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:34:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:34:40,692 INFO L87 Difference]: Start difference. First operand 261 states and 645 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:41,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:41,191 INFO L93 Difference]: Finished difference Result 384 states and 977 transitions. [2022-12-14 07:34:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:34:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 07:34:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:41,193 INFO L225 Difference]: With dead ends: 384 [2022-12-14 07:34:41,193 INFO L226 Difference]: Without dead ends: 369 [2022-12-14 07:34:41,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:34:41,194 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 57 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:41,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 14 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:34:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-12-14 07:34:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 327. [2022-12-14 07:34:41,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 324 states have (on average 2.496913580246914) internal successors, (809), 326 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 809 transitions. [2022-12-14 07:34:41,198 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 809 transitions. Word has length 24 [2022-12-14 07:34:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:41,199 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 809 transitions. [2022-12-14 07:34:41,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:41,199 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 809 transitions. [2022-12-14 07:34:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:34:41,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:41,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:41,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 07:34:41,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:34:41,401 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:34:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:41,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1275338347, now seen corresponding path program 1 times [2022-12-14 07:34:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:34:41,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807213973] [2022-12-14 07:34:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:41,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:34:41,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:34:41,406 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:34:41,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 07:34:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:34:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:34:41,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:34:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:34:42,200 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:34:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807213973] [2022-12-14 07:34:42,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807213973] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:34:42,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588578369] [2022-12-14 07:34:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:42,200 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:34:42,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:34:42,201 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:34:42,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 07:34:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:34:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:34:42,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:34:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:34:42,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [588578369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:34:42,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964199311] [2022-12-14 07:34:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:42,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:34:42,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:34:42,790 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:34:42,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 07:34:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:34:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:34:43,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:34:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:34:43,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964199311] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:34:43,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:34:43,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 07:34:43,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967209632] [2022-12-14 07:34:43,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:34:43,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:34:43,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:34:43,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:34:43,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:34:43,226 INFO L87 Difference]: Start difference. First operand 327 states and 809 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:44,603 INFO L93 Difference]: Finished difference Result 537 states and 1311 transitions. [2022-12-14 07:34:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:34:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 07:34:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:44,605 INFO L225 Difference]: With dead ends: 537 [2022-12-14 07:34:44,605 INFO L226 Difference]: Without dead ends: 493 [2022-12-14 07:34:44,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:34:44,605 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:44,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 32 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:34:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-12-14 07:34:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 395. [2022-12-14 07:34:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 392 states have (on average 2.438775510204082) internal successors, (956), 394 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 956 transitions. [2022-12-14 07:34:44,616 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 956 transitions. Word has length 25 [2022-12-14 07:34:44,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:44,616 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 956 transitions. [2022-12-14 07:34:44,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:44,616 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 956 transitions. [2022-12-14 07:34:44,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:34:44,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:44,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:44,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-12-14 07:34:44,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 07:34:45,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-12-14 07:34:45,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:34:45,219 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:34:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1362929052, now seen corresponding path program 1 times [2022-12-14 07:34:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:34:45,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722650891] [2022-12-14 07:34:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:34:45,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:34:45,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:34:45,225 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:34:45,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 07:34:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:34:45,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:34:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:34:45,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:34:45,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:34:45,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722650891] [2022-12-14 07:34:45,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722650891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:45,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:45,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:34:45,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086092251] [2022-12-14 07:34:45,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:45,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:34:45,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:34:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:34:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:34:45,503 INFO L87 Difference]: Start difference. First operand 395 states and 956 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:34:45,883 INFO L93 Difference]: Finished difference Result 429 states and 1018 transitions. [2022-12-14 07:34:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:34:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 07:34:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:34:45,885 INFO L225 Difference]: With dead ends: 429 [2022-12-14 07:34:45,885 INFO L226 Difference]: Without dead ends: 416 [2022-12-14 07:34:45,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:34:45,886 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:34:45,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:34:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-12-14 07:34:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 413. [2022-12-14 07:34:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 410 states have (on average 2.4073170731707316) internal successors, (987), 412 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 987 transitions. [2022-12-14 07:34:45,893 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 987 transitions. Word has length 25 [2022-12-14 07:34:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:34:45,894 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 987 transitions. [2022-12-14 07:34:45,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 987 transitions. [2022-12-14 07:34:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:34:45,896 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:34:45,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:34:45,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-12-14 07:34:46,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:34:46,097 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:34:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:34:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1329889472, now seen corresponding path program 2 times [2022-12-14 07:34:46,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:34:46,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649765853] [2022-12-14 07:34:46,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:34:46,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:34:46,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:34:46,103 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:34:46,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 07:34:46,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:34:46,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:34:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:34:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:34:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:34:48,094 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 07:34:48,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 125 [2022-12-14 07:34:48,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:34:48,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 60 [2022-12-14 07:34:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:34:48,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:34:48,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:34:48,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649765853] [2022-12-14 07:34:48,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649765853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:34:48,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:34:48,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 07:34:48,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904099334] [2022-12-14 07:34:48,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:34:48,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:34:48,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:34:48,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:34:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:34:48,502 INFO L87 Difference]: Start difference. First operand 413 states and 987 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:34:52,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:34:55,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:34:57,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:35:00,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 07:35:01,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:01,295 INFO L93 Difference]: Finished difference Result 458 states and 1063 transitions. [2022-12-14 07:35:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:35:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 07:35:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:01,297 INFO L225 Difference]: With dead ends: 458 [2022-12-14 07:35:01,297 INFO L226 Difference]: Without dead ends: 397 [2022-12-14 07:35:01,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:35:01,298 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:01,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 44 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 2 Unknown, 0 Unchecked, 12.7s Time] [2022-12-14 07:35:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-12-14 07:35:01,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 397. [2022-12-14 07:35:01,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 394 states have (on average 2.3578680203045685) internal successors, (929), 396 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:01,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 929 transitions. [2022-12-14 07:35:01,304 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 929 transitions. Word has length 25 [2022-12-14 07:35:01,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:01,304 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 929 transitions. [2022-12-14 07:35:01,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 929 transitions. [2022-12-14 07:35:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:35:01,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:01,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:01,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 07:35:01,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:35:01,506 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:35:01,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:01,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2069085442, now seen corresponding path program 3 times [2022-12-14 07:35:01,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:35:01,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703858960] [2022-12-14 07:35:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:35:01,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:35:01,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:35:01,512 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:35:01,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 07:35:01,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:35:01,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:35:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:02,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:35:02,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:02,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 47 [2022-12-14 07:35:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:35:02,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:35:02,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:35:02,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703858960] [2022-12-14 07:35:02,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703858960] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:35:02,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:35:02,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:35:02,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673323716] [2022-12-14 07:35:02,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:35:02,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:35:02,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:35:02,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:35:02,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:35:02,535 INFO L87 Difference]: Start difference. First operand 397 states and 929 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:03,519 INFO L93 Difference]: Finished difference Result 431 states and 991 transitions. [2022-12-14 07:35:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:35:03,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 07:35:03,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:03,521 INFO L225 Difference]: With dead ends: 431 [2022-12-14 07:35:03,521 INFO L226 Difference]: Without dead ends: 417 [2022-12-14 07:35:03,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:35:03,522 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:03,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 16 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:35:03,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-12-14 07:35:03,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 399. [2022-12-14 07:35:03,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 396 states have (on average 2.3535353535353534) internal successors, (932), 398 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 932 transitions. [2022-12-14 07:35:03,527 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 932 transitions. Word has length 25 [2022-12-14 07:35:03,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:03,527 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 932 transitions. [2022-12-14 07:35:03,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:03,527 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 932 transitions. [2022-12-14 07:35:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 07:35:03,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:03,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:35:03,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-14 07:35:03,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:35:03,728 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:35:03,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:03,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1837028064, now seen corresponding path program 2 times [2022-12-14 07:35:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:35:03,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122949014] [2022-12-14 07:35:03,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:35:03,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:35:03,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:35:03,730 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:35:03,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-14 07:35:04,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:35:04,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:04,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:35:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:04,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 494 [2022-12-14 07:35:04,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:35:04,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:35:04,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 07:35:04,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 47 [2022-12-14 07:35:04,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:35:04,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 07:35:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:35:04,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:04,966 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1945 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (_ bv0 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1945) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset))))))) is different from false [2022-12-14 07:35:05,004 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1945 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_1944 (Array (_ BitVec 32) (_ BitVec 8)))) (not (= (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1944) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1945) c_~q1~0.base)) (.cse1 (bvmul (_ bv4 32) c_~q1_front~0))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) .cse1 c_~q1~0.offset)) (select .cse0 (bvadd (_ bv2 32) .cse1 c_~q1~0.offset))) (select .cse0 (bvadd .cse1 c_~q1~0.offset (_ bv1 32)))) (select .cse0 (bvadd .cse1 c_~q1~0.offset)))) (_ bv0 32)))) is different from false [2022-12-14 07:35:05,396 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:35:05,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 851 treesize of output 794 [2022-12-14 07:35:05,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 688 treesize of output 472 [2022-12-14 07:35:05,598 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:35:05,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 530 treesize of output 497 [2022-12-14 07:35:05,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:35:05,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 418 treesize of output 310 [2022-12-14 07:35:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 1 not checked. [2022-12-14 07:35:07,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:35:07,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122949014] [2022-12-14 07:35:07,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122949014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:07,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1449702431] [2022-12-14 07:35:07,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:35:07,201 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:35:07,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:35:07,202 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:35:07,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 07:35:07,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:35:07,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592200884] [2022-12-14 07:35:07,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:35:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:35:07,621 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:35:07,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 07:35:07,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 1 [2022-12-14 07:35:07,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:35:07,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:07,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 07:35:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:07,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-12-14 07:35:08,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 07:35:09,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 51 treesize of output 47 [2022-12-14 07:35:09,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:35:09,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:35:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:35:09,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:10,318 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:35:10,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 428 treesize of output 371 [2022-12-14 07:35:10,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:35:10,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 312 treesize of output 204 [2022-12-14 07:35:10,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:35:10,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 150 [2022-12-14 07:35:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:35:11,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592200884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:11,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 07:35:11,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 10, 10] total 30 [2022-12-14 07:35:11,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401431730] [2022-12-14 07:35:11,872 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 07:35:11,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 07:35:11,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:35:11,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 07:35:11,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=688, Unknown=2, NotChecked=110, Total=930 [2022-12-14 07:35:11,873 INFO L87 Difference]: Start difference. First operand 399 states and 932 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:21,685 WARN L233 SmtUtils]: Spent 9.24s on a formula simplification. DAG size of input: 87 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:35:36,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 07:35:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:35:39,023 INFO L93 Difference]: Finished difference Result 935 states and 2559 transitions. [2022-12-14 07:35:39,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 07:35:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 07:35:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:35:39,025 INFO L225 Difference]: With dead ends: 935 [2022-12-14 07:35:39,025 INFO L226 Difference]: Without dead ends: 935 [2022-12-14 07:35:39,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=478, Invalid=2381, Unknown=11, NotChecked=210, Total=3080 [2022-12-14 07:35:39,026 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 350 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 73 mSolverCounterUnsat, 60 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 60 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:35:39,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 171 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1304 Invalid, 60 Unknown, 275 Unchecked, 9.6s Time] [2022-12-14 07:35:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-12-14 07:35:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 670. [2022-12-14 07:35:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 667 states have (on average 2.790104947526237) internal successors, (1861), 669 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1861 transitions. [2022-12-14 07:35:39,036 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1861 transitions. Word has length 26 [2022-12-14 07:35:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:35:39,036 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1861 transitions. [2022-12-14 07:35:39,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:35:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1861 transitions. [2022-12-14 07:35:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 07:35:39,037 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:35:39,037 INFO L195 NwaCegarLoop]: trace histogram [24, 1, 1] [2022-12-14 07:35:39,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-14 07:35:39,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 07:35:39,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:35:39,439 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-12-14 07:35:39,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:35:39,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1439406002, now seen corresponding path program 4 times [2022-12-14 07:35:39,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:35:39,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963808899] [2022-12-14 07:35:39,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:35:39,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:35:39,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:35:39,444 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:35:39,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 07:35:39,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:35:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:39,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 07:35:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:40,009 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:35:40,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:35:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:42,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:35:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:56,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:35:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963808899] [2022-12-14 07:35:56,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963808899] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:35:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014401520] [2022-12-14 07:35:56,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:35:56,474 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:35:56,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:35:56,475 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:35:56,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 07:35:56,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:35:56,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:35:56,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 07:35:56,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:35:57,072 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:35:57,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:35:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:35:59,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:36:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:36:01,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014401520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:36:01,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142459826] [2022-12-14 07:36:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:36:01,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:36:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:36:01,638 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:36:01,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d0329c6-5f7f-4ff9-ba4a-3d4d4f273d98/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 07:36:01,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:36:01,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:36:01,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 07:36:01,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:36:02,006 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 07:36:02,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 07:36:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:36:02,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:36:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:36:03,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142459826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:36:03,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:36:03,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 66 [2022-12-14 07:36:03,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786019025] [2022-12-14 07:36:03,727 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:36:03,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 07:36:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:36:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 07:36:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 07:36:03,728 INFO L87 Difference]: Start difference. First operand 670 states and 1861 transitions. Second operand has 68 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:36:47,838 WARN L233 SmtUtils]: Spent 19.37s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:37:07,427 WARN L233 SmtUtils]: Spent 16.53s on a formula simplification that was a NOOP. DAG size: 265 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:37:09,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:11,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:13,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:15,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:17,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:19,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:21,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:23,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:25,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:27,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:29,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:31,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:33,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:35,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:37,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:39,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:41,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:43,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:45,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:47,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:49,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:51,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:53,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:37:55,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:38:18,172 WARN L233 SmtUtils]: Spent 19.52s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:38:39,057 WARN L233 SmtUtils]: Spent 17.96s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:38:57,568 WARN L233 SmtUtils]: Spent 14.67s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:39:10,879 WARN L233 SmtUtils]: Spent 10.31s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)