./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- 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 05:42:42,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:42:42,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:42:42,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:42:42,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:42:42,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:42:42,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:42:42,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:42:42,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:42:42,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:42:42,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:42:42,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:42:42,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:42:42,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:42:42,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:42:42,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:42:42,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:42:42,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:42:42,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:42:42,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:42:42,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:42:42,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:42:42,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:42:42,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:42:42,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:42:42,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:42:42,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:42:42,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:42:42,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:42:42,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:42:42,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:42:42,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:42:42,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:42:42,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:42:42,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:42:42,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:42:42,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:42:42,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:42:42,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:42:42,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:42:42,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:42:42,798 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 05:42:42,818 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:42:42,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:42:42,818 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:42:42,818 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:42:42,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:42:42,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:42:42,820 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:42:42,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:42:42,820 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:42:42,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:42:42,820 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:42:42,820 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:42:42,820 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:42:42,821 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:42:42,821 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:42:42,821 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:42:42,821 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:42:42,821 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:42:42,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:42:42,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:42:42,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:42:42,822 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:42:42,822 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:42:42,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:42:42,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:42:42,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:42:42,823 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:42:42,823 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:42:42,823 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:42:42,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:42:42,824 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:42:42,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:42:42,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:42:42,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:42:42,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:42:42,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:42:42,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:42:42,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:42:42,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:42:42,825 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:42:42,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:42:42,825 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:42:42,825 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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-12-14 05:42:43,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:42:43,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:42:43,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:42:43,025 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:42:43,026 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:42:43,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-12-14 05:42:45,648 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:42:45,826 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:42:45,826 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-12-14 05:42:45,832 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data/5a733a5c0/e7738477a259448d8e232d043db5ef01/FLAGa450f4cc9 [2022-12-14 05:42:45,843 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data/5a733a5c0/e7738477a259448d8e232d043db5ef01 [2022-12-14 05:42:45,845 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:42:45,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:42:45,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:42:45,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:42:45,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:42:45,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:42:45" (1/1) ... [2022-12-14 05:42:45,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb68460 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:45, skipping insertion in model container [2022-12-14 05:42:45,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:42:45" (1/1) ... [2022-12-14 05:42:45,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:42:45,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:42:46,043 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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-12-14 05:42:46,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:42:46,064 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 05:42:46,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@c1890de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:46, skipping insertion in model container [2022-12-14 05:42:46,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:42:46,065 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 05:42:46,067 INFO L158 Benchmark]: Toolchain (without parser) took 219.45ms. Allocated memory is still 115.3MB. Free memory was 85.3MB in the beginning and 75.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 05:42:46,067 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 115.3MB. Free memory was 90.4MB in the beginning and 90.4MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 05:42:46,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.55ms. Allocated memory is still 115.3MB. Free memory was 85.3MB in the beginning and 75.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 05:42:46,069 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 115.3MB. Free memory was 90.4MB in the beginning and 90.4MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.55ms. Allocated memory is still 115.3MB. Free memory was 85.3MB in the beginning and 75.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 117]: 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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 --- 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 05:42:47,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:42:47,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:42:47,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:42:47,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:42:47,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:42:47,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:42:47,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:42:47,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:42:47,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:42:47,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:42:47,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:42:47,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:42:47,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:42:47,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:42:47,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:42:47,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:42:47,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:42:47,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:42:47,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:42:47,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:42:47,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:42:47,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:42:47,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:42:47,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:42:47,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:42:47,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:42:47,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:42:47,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:42:47,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:42:47,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:42:47,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:42:47,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:42:47,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:42:47,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:42:47,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:42:47,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:42:47,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:42:47,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:42:47,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:42:47,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:42:47,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 05:42:47,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:42:47,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:42:47,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:42:47,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:42:47,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:42:47,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:42:47,703 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:42:47,703 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:42:47,703 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:42:47,703 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:42:47,704 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:42:47,704 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:42:47,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:42:47,705 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:42:47,705 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:42:47,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:42:47,705 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:42:47,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:42:47,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 05:42:47,706 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 05:42:47,707 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:42:47,707 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:42:47,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:42:47,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 05:42:47,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:42:47,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:42:47,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:42:47,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:42:47,714 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 05:42:47,715 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 05:42:47,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:42:47,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 05:42:47,715 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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f188168fffbbf8c03071990a7bb806f47bcfd599d52fd9001ab6073a6b782e8 [2022-12-14 05:42:47,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:42:47,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:42:47,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:42:47,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:42:47,974 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:42:47,975 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-12-14 05:42:50,542 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:42:50,675 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:42:50,675 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2022-12-14 05:42:50,681 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data/5fbf265d3/eef516cda836488eb04e82ebcdbc754d/FLAG54b2d13df [2022-12-14 05:42:50,692 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/data/5fbf265d3/eef516cda836488eb04e82ebcdbc754d [2022-12-14 05:42:50,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:42:50,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:42:50,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:42:50,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:42:50,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:42:50,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:50,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@587bdf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50, skipping insertion in model container [2022-12-14 05:42:50,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:50,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:42:50,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:42:50,871 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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-12-14 05:42:50,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:42:50,890 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 05:42:50,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:42:50,916 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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-12-14 05:42:50,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:42:50,926 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:42:50,948 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_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c[2728,2741] [2022-12-14 05:42:50,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:42:50,969 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:42:50,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50 WrapperNode [2022-12-14 05:42:50,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:42:50,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:42:50,971 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:42:50,971 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:42:50,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:50,984 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,004 INFO L138 Inliner]: procedures = 28, calls = 49, calls flagged for inlining = 13, calls inlined = 21, statements flattened = 268 [2022-12-14 05:42:51,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:42:51,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:42:51,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:42:51,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:42:51,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,027 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,031 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:42:51,032 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:42:51,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:42:51,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:42:51,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (1/1) ... [2022-12-14 05:42:51,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:42:51,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:42:51,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:42:51,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:42:51,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:42:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 05:42:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:42:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 05:42:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 05:42:51,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 05:42:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 05:42:51,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 05:42:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 05:42:51,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 05:42:51,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:42:51,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:42:51,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:42:51,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:42:51,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 05:42:51,101 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 05:42:51,193 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:42:51,195 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:42:51,825 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:42:51,834 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:42:51,834 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 05:42:51,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:42:51 BoogieIcfgContainer [2022-12-14 05:42:51,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:42:51,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:42:51,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:42:51,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:42:51,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:42:50" (1/3) ... [2022-12-14 05:42:51,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdae6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:42:51, skipping insertion in model container [2022-12-14 05:42:51,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:42:50" (2/3) ... [2022-12-14 05:42:51,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fdae6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:42:51, skipping insertion in model container [2022-12-14 05:42:51,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:42:51" (3/3) ... [2022-12-14 05:42:51,844 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2022-12-14 05:42:51,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:42:51,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-12-14 05:42:51,862 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 05:42:51,964 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 05:42:51,999 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 05:42:52,016 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 369 places, 387 transitions, 798 flow [2022-12-14 05:42:52,019 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 369 places, 387 transitions, 798 flow [2022-12-14 05:42:52,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 369 places, 387 transitions, 798 flow [2022-12-14 05:42:52,171 INFO L130 PetriNetUnfolder]: 28/384 cut-off events. [2022-12-14 05:42:52,171 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 05:42:52,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 384 events. 28/384 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 847 event pairs, 0 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 290. Up to 3 conditions per place. [2022-12-14 05:42:52,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 25650 [2022-12-14 05:43:33,364 INFO L134 LiptonReduction]: Checked pairs total: 38517 [2022-12-14 05:43:33,364 INFO L136 LiptonReduction]: Total number of compositions: 457 [2022-12-14 05:43:33,371 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 83 transitions, 190 flow [2022-12-14 05:43:33,761 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 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 05:43:33,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:43:33,784 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;@1c23d6c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:43:33,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-12-14 05:43:33,802 INFO L276 IsEmpty]: Start isEmpty. Operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 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 05:43:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:43:33,806 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:33,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:43:33,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:43:33,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 49546, now seen corresponding path program 1 times [2022-12-14 05:43:33,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:33,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661924300] [2022-12-14 05:43:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:33,838 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 05:43:33,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:33,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:33,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:43:33,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:34,162 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:43:34,162 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 05:43:34,204 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 05:43:34,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:34,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:34,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661924300] [2022-12-14 05:43:34,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661924300] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:34,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:34,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:43:34,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210889187] [2022-12-14 05:43:34,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:34,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:43:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:43:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:43:34,248 INFO L87 Difference]: Start difference. First operand has 10140 states, 7584 states have (on average 5.030458860759493) internal successors, (38151), 10139 states have internal predecessors, (38151), 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 05:43:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:35,137 INFO L93 Difference]: Finished difference Result 13522 states and 50440 transitions. [2022-12-14 05:43:35,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:43:35,140 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 05:43:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:35,250 INFO L225 Difference]: With dead ends: 13522 [2022-12-14 05:43:35,250 INFO L226 Difference]: Without dead ends: 13522 [2022-12-14 05:43:35,251 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 05:43:35,253 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:35,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:43:35,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13522 states. [2022-12-14 05:43:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13522 to 6766. [2022-12-14 05:43:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 5263 states have (on average 4.794413832414972) internal successors, (25233), 6765 states have internal predecessors, (25233), 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 05:43:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 25233 transitions. [2022-12-14 05:43:35,682 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 25233 transitions. Word has length 2 [2022-12-14 05:43:35,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:35,683 INFO L495 AbstractCegarLoop]: Abstraction has 6766 states and 25233 transitions. [2022-12-14 05:43:35,683 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 05:43:35,683 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 25233 transitions. [2022-12-14 05:43:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:43:35,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:35,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:43:35,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:35,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:35,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:43:35,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:35,885 INFO L85 PathProgramCache]: Analyzing trace with hash 49545, now seen corresponding path program 1 times [2022-12-14 05:43:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256069664] [2022-12-14 05:43:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:35,886 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 05:43:35,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:35,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:35,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:35,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:43:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:36,000 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 05:43:36,001 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 05:43:36,014 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 05:43:36,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:36,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:36,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256069664] [2022-12-14 05:43:36,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256069664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:36,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:36,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:43:36,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246768786] [2022-12-14 05:43:36,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:36,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:43:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:43:36,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:43:36,018 INFO L87 Difference]: Start difference. First operand 6766 states and 25233 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 05:43:36,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:36,444 INFO L93 Difference]: Finished difference Result 6763 states and 25227 transitions. [2022-12-14 05:43:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:43:36,444 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 05:43:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:36,484 INFO L225 Difference]: With dead ends: 6763 [2022-12-14 05:43:36,484 INFO L226 Difference]: Without dead ends: 6763 [2022-12-14 05:43:36,485 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 05:43:36,486 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:36,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:43:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-12-14 05:43:36,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-12-14 05:43:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5263 states have (on average 4.793273798213947) internal successors, (25227), 6762 states have internal predecessors, (25227), 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 05:43:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 25227 transitions. [2022-12-14 05:43:36,726 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 25227 transitions. Word has length 2 [2022-12-14 05:43:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:36,727 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 25227 transitions. [2022-12-14 05:43:36,727 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 05:43:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 25227 transitions. [2022-12-14 05:43:36,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:43:36,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:36,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:43:36,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:36,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:43:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1544304, now seen corresponding path program 1 times [2022-12-14 05:43:36,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:36,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899404837] [2022-12-14 05:43:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:36,930 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 05:43:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:36,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:36,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:43:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:37,159 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:43:37,160 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 05:43:37,221 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 05:43:37,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:37,424 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 05:43:37,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899404837] [2022-12-14 05:43:37,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899404837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:37,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1625123766] [2022-12-14 05:43:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:43:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:43:37,427 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:43:37,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 05:43:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:37,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:43:37,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:37,657 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:43:37,657 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 05:43:37,692 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 05:43:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:37,745 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 05:43:37,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1625123766] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740098190] [2022-12-14 05:43:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:37,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:37,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:37,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:37,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:43:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:37,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:43:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:37,894 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:43:37,894 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 05:43:37,937 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 05:43:37,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:38,064 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 05:43:38,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740098190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:38,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:43:38,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 05:43:38,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492917867] [2022-12-14 05:43:38,065 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:38,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:43:38,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:38,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:43:38,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:43:38,066 INFO L87 Difference]: Start difference. First operand 6763 states and 25227 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 05:43:39,375 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 05:43:40,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:43,430 INFO L93 Difference]: Finished difference Result 27031 states and 100872 transitions. [2022-12-14 05:43:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:43:43,431 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 05:43:43,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:43,536 INFO L225 Difference]: With dead ends: 27031 [2022-12-14 05:43:43,536 INFO L226 Difference]: Without dead ends: 27031 [2022-12-14 05:43:43,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:43:43,537 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 617 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:43,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 0 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 05:43:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27031 states. [2022-12-14 05:43:43,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27031 to 6772. [2022-12-14 05:43:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 5272 states have (on average 4.789643399089529) internal successors, (25251), 6771 states have internal predecessors, (25251), 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 05:43:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 25251 transitions. [2022-12-14 05:43:43,862 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 25251 transitions. Word has length 3 [2022-12-14 05:43:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:43,863 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 25251 transitions. [2022-12-14 05:43:43,863 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 05:43:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 25251 transitions. [2022-12-14 05:43:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 05:43:43,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:43,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 05:43:43,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:43:44,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:44,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 05:43:44,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:43:44,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:43:44,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:44,467 INFO L85 PathProgramCache]: Analyzing trace with hash 47920972, now seen corresponding path program 1 times [2022-12-14 05:43:44,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:44,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306789577] [2022-12-14 05:43:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:44,468 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 05:43:44,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:44,470 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:44,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (7)] Waiting until timeout for monitored process [2022-12-14 05:43:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:43:44,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:44,673 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-14 05:43:44,674 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 05:43:44,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:44,934 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 05:43:44,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-14 05:43:45,211 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-14 05:43:45,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 80 [2022-12-14 05:43:47,815 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 05:43:47,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:47,816 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:47,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306789577] [2022-12-14 05:43:47,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306789577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:47,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:47,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:43:47,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418319418] [2022-12-14 05:43:47,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:47,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:43:47,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:47,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:43:47,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-14 05:43:47,818 INFO L87 Difference]: Start difference. First operand 6772 states and 25251 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 05:43:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:48,532 INFO L93 Difference]: Finished difference Result 5399 states and 19562 transitions. [2022-12-14 05:43:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:43:48,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 4 [2022-12-14 05:43:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:48,548 INFO L225 Difference]: With dead ends: 5399 [2022-12-14 05:43:48,548 INFO L226 Difference]: Without dead ends: 5399 [2022-12-14 05:43:48,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-14 05:43:48,549 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:48,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:43:48,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-12-14 05:43:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5399. [2022-12-14 05:43:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 4305 states have (on average 4.544018583042973) internal successors, (19562), 5398 states have internal predecessors, (19562), 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 05:43:48,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 19562 transitions. [2022-12-14 05:43:48,655 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 19562 transitions. Word has length 4 [2022-12-14 05:43:48,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:48,655 INFO L495 AbstractCegarLoop]: Abstraction has 5399 states and 19562 transitions. [2022-12-14 05:43:48,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 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 05:43:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 19562 transitions. [2022-12-14 05:43:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 05:43:48,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:48,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 05:43:48,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (7)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:48,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:48,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:43:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash 47920973, now seen corresponding path program 1 times [2022-12-14 05:43:48,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:48,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345349842] [2022-12-14 05:43:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:43:48,859 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 05:43:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:48,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:48,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Waiting until timeout for monitored process [2022-12-14 05:43:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:43:49,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:43:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:49,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:49,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:49,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:49,098 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 05:43:49,098 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 05:43:49,129 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 05:43:49,129 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 44 treesize of output 45 [2022-12-14 05:43:49,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:49,179 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 05:43:49,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:43:49,199 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 05:43:49,224 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 05:43:49,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:43:49,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:49,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345349842] [2022-12-14 05:43:49,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345349842] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:43:49,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:43:49,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:43:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193418985] [2022-12-14 05:43:49,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:43:49,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:43:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:43:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:43:49,225 INFO L87 Difference]: Start difference. First operand 5399 states and 19562 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 05:43:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:43:49,612 INFO L93 Difference]: Finished difference Result 4026 states and 13873 transitions. [2022-12-14 05:43:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:43:49,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 05:43:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:43:49,623 INFO L225 Difference]: With dead ends: 4026 [2022-12-14 05:43:49,623 INFO L226 Difference]: Without dead ends: 4026 [2022-12-14 05:43:49,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 05:43:49,624 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:43:49,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:43:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-12-14 05:43:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4026. [2022-12-14 05:43:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3338 states have (on average 4.156081485919713) internal successors, (13873), 4025 states have internal predecessors, (13873), 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 05:43:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 13873 transitions. [2022-12-14 05:43:49,707 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 13873 transitions. Word has length 4 [2022-12-14 05:43:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:43:49,707 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 13873 transitions. [2022-12-14 05:43:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 05:43:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 13873 transitions. [2022-12-14 05:43:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:43:49,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:43:49,707 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 05:43:49,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:43:49,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:49,909 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:43:49,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:43:49,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1229960438, now seen corresponding path program 2 times [2022-12-14 05:43:49,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:43:49,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912750818] [2022-12-14 05:43:49,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:43:49,910 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 05:43:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:43:49,911 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:49,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:43:49,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:43:49,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:43:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:43:49,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:50,090 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:43:50,090 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 05:43:50,203 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 05:43:50,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:50,858 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 05:43:50,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:43:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912750818] [2022-12-14 05:43:50,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912750818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [299492305] [2022-12-14 05:43:50,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:43:50,859 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:43:50,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:43:50,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:43:50,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-12-14 05:43:50,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:43:50,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:43:51,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:43:51,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:51,082 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:43:51,082 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 05:43:51,131 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 05:43:51,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:51,257 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 05:43:51,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [299492305] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333532568] [2022-12-14 05:43:51,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:43:51,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:43:51,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:43:51,258 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:43:51,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:43:51,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:43:51,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:43:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:43:51,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:43:51,439 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:43:51,439 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 05:43:51,486 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 05:43:51,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:43:51,620 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 05:43:51,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333532568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:43:51,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:43:51,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 05:43:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416482167] [2022-12-14 05:43:51,621 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:43:51,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:43:51,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:43:51,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:43:51,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:43:51,622 INFO L87 Difference]: Start difference. First operand 4026 states and 13873 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 05:43:55,102 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 05:43:56,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:43:58,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:44:00,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:44:02,803 WARN L539 Checker$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 05:44:04,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:44:07,107 WARN L539 Checker$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 05:44:09,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:44:11,096 WARN L539 Checker$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 05:44:13,138 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 05:44:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:17,088 INFO L93 Difference]: Finished difference Result 28080 states and 96931 transitions. [2022-12-14 05:44:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:44:17,089 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 6 [2022-12-14 05:44:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:17,178 INFO L225 Difference]: With dead ends: 28080 [2022-12-14 05:44:17,179 INFO L226 Difference]: Without dead ends: 28080 [2022-12-14 05:44:17,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:44:17,179 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1218 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 103 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:17,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 0 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1848 Invalid, 6 Unknown, 0 Unchecked, 24.0s Time] [2022-12-14 05:44:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28080 states. [2022-12-14 05:44:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28080 to 4038. [2022-12-14 05:44:17,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 3350 states have (on average 4.148358208955224) internal successors, (13897), 4037 states have internal predecessors, (13897), 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 05:44:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 13897 transitions. [2022-12-14 05:44:17,401 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 13897 transitions. Word has length 6 [2022-12-14 05:44:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:17,401 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 13897 transitions. [2022-12-14 05:44:17,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 05:44:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 13897 transitions. [2022-12-14 05:44:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:44:17,401 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:17,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:44:17,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:44:17,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:17,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-12-14 05:44:18,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:44:18,005 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1192549841, now seen corresponding path program 1 times [2022-12-14 05:44:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:18,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [363360038] [2022-12-14 05:44:18,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:18,008 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 05:44:18,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:18,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:18,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:44:18,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:18,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:18,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:18,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:18,207 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 05:44:18,207 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 05:44:18,222 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 05:44:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:18,261 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 05:44:18,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:18,286 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 05:44:18,332 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 05:44:18,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:18,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:18,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [363360038] [2022-12-14 05:44:18,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [363360038] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:18,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:18,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:44:18,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777012404] [2022-12-14 05:44:18,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:18,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:44:18,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:18,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:44:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:44:18,334 INFO L87 Difference]: Start difference. First operand 4038 states and 13897 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 05:44:18,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:18,658 INFO L93 Difference]: Finished difference Result 3926 states and 13567 transitions. [2022-12-14 05:44:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:44:18,659 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 05:44:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:18,669 INFO L225 Difference]: With dead ends: 3926 [2022-12-14 05:44:18,669 INFO L226 Difference]: Without dead ends: 3926 [2022-12-14 05:44:18,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 05:44:18,669 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:18,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:44:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2022-12-14 05:44:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3926. [2022-12-14 05:44:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3292 states have (on average 4.121202916160389) internal successors, (13567), 3925 states have internal predecessors, (13567), 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 05:44:18,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 13567 transitions. [2022-12-14 05:44:18,729 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 13567 transitions. Word has length 6 [2022-12-14 05:44:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:18,729 INFO L495 AbstractCegarLoop]: Abstraction has 3926 states and 13567 transitions. [2022-12-14 05:44:18,730 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 05:44:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 13567 transitions. [2022-12-14 05:44:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:44:18,730 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:18,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:44:18,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:18,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:18,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1192549840, now seen corresponding path program 1 times [2022-12-14 05:44:18,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:18,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339430038] [2022-12-14 05:44:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:18,934 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 05:44:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:18,937 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:18,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (13)] Waiting until timeout for monitored process [2022-12-14 05:44:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:19,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:44:19,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:19,113 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-14 05:44:19,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-14 05:44:19,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:19,319 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-14 05:44:19,319 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 36 [2022-12-14 05:44:19,501 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-14 05:44:19,502 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 05:44:19,589 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 05:44:19,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:19,589 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:19,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339430038] [2022-12-14 05:44:19,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339430038] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:19,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:19,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:44:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081973776] [2022-12-14 05:44:19,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:19,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:44:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:19,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:44:19,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:44:19,591 INFO L87 Difference]: Start difference. First operand 3926 states and 13567 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 05:44:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:20,070 INFO L93 Difference]: Finished difference Result 3814 states and 13237 transitions. [2022-12-14 05:44:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:44:20,070 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 05:44:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:20,080 INFO L225 Difference]: With dead ends: 3814 [2022-12-14 05:44:20,080 INFO L226 Difference]: Without dead ends: 3814 [2022-12-14 05:44:20,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:44:20,081 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:20,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:44:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2022-12-14 05:44:20,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3814. [2022-12-14 05:44:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3234 states have (on average 4.093073593073593) internal successors, (13237), 3813 states have internal predecessors, (13237), 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 05:44:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 13237 transitions. [2022-12-14 05:44:20,141 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 13237 transitions. Word has length 6 [2022-12-14 05:44:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:20,141 INFO L495 AbstractCegarLoop]: Abstraction has 3814 states and 13237 transitions. [2022-12-14 05:44:20,141 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 05:44:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 13237 transitions. [2022-12-14 05:44:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:44:20,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:20,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:20,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (13)] Ended with exit code 0 [2022-12-14 05:44:20,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:20,343 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:20,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1685657955, now seen corresponding path program 1 times [2022-12-14 05:44:20,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:20,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000450533] [2022-12-14 05:44:20,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:20,343 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 05:44:20,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:20,344 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:20,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (14)] Waiting until timeout for monitored process [2022-12-14 05:44:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:20,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:44:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:20,462 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 05:44:20,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:20,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:20,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000450533] [2022-12-14 05:44:20,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000450533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:20,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:20,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:44:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997499953] [2022-12-14 05:44:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:44:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:44:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:20,464 INFO L87 Difference]: Start difference. First operand 3814 states and 13237 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 05:44:21,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:21,316 INFO L93 Difference]: Finished difference Result 4821 states and 16306 transitions. [2022-12-14 05:44:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:44:21,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 05:44:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:21,326 INFO L225 Difference]: With dead ends: 4821 [2022-12-14 05:44:21,327 INFO L226 Difference]: Without dead ends: 4821 [2022-12-14 05:44:21,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:21,327 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:21,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:44:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2022-12-14 05:44:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 4339. [2022-12-14 05:44:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 3759 states have (on average 3.996807661612131) internal successors, (15024), 4338 states have internal predecessors, (15024), 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 05:44:21,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 15024 transitions. [2022-12-14 05:44:21,397 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 15024 transitions. Word has length 7 [2022-12-14 05:44:21,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:21,397 INFO L495 AbstractCegarLoop]: Abstraction has 4339 states and 15024 transitions. [2022-12-14 05:44:21,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 05:44:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 15024 transitions. [2022-12-14 05:44:21,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:44:21,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:21,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:21,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (14)] Ended with exit code 0 [2022-12-14 05:44:21,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:21,599 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:21,600 INFO L85 PathProgramCache]: Analyzing trace with hash 284011069, now seen corresponding path program 1 times [2022-12-14 05:44:21,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:21,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043853940] [2022-12-14 05:44:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:21,601 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 05:44:21,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:21,604 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:21,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:21,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:44:21,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:21,773 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 05:44:21,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:21,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:21,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043853940] [2022-12-14 05:44:21,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043853940] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:21,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:21,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:44:21,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032299223] [2022-12-14 05:44:21,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:21,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:44:21,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:21,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:44:21,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:21,775 INFO L87 Difference]: Start difference. First operand 4339 states and 15024 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:22,528 INFO L93 Difference]: Finished difference Result 5854 states and 19846 transitions. [2022-12-14 05:44:22,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:44:22,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:44:22,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:22,550 INFO L225 Difference]: With dead ends: 5854 [2022-12-14 05:44:22,551 INFO L226 Difference]: Without dead ends: 5854 [2022-12-14 05:44:22,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:22,551 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:22,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 05:44:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5854 states. [2022-12-14 05:44:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5854 to 4339. [2022-12-14 05:44:22,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4339 states, 3759 states have (on average 3.996807661612131) internal successors, (15024), 4338 states have internal predecessors, (15024), 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 05:44:22,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 15024 transitions. [2022-12-14 05:44:22,619 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 15024 transitions. Word has length 8 [2022-12-14 05:44:22,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:22,620 INFO L495 AbstractCegarLoop]: Abstraction has 4339 states and 15024 transitions. [2022-12-14 05:44:22,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 15024 transitions. [2022-12-14 05:44:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:44:22,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:22,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:22,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:22,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:22,822 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:22,823 INFO L85 PathProgramCache]: Analyzing trace with hash 715904221, now seen corresponding path program 1 times [2022-12-14 05:44:22,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:22,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227511975] [2022-12-14 05:44:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:22,825 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 05:44:22,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:22,828 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:22,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:23,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:44:23,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:23,088 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 05:44:23,089 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 05:44:23,103 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 05:44:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:23,157 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 05:44:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:23,192 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 05:44:23,257 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 05:44:23,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:23,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:23,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227511975] [2022-12-14 05:44:23,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227511975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:23,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:23,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:44:23,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798252237] [2022-12-14 05:44:23,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:23,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:44:23,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:23,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:44:23,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:23,259 INFO L87 Difference]: Start difference. First operand 4339 states and 15024 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:23,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:23,646 INFO L93 Difference]: Finished difference Result 4108 states and 14308 transitions. [2022-12-14 05:44:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:44:23,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:44:23,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:23,656 INFO L225 Difference]: With dead ends: 4108 [2022-12-14 05:44:23,656 INFO L226 Difference]: Without dead ends: 4108 [2022-12-14 05:44:23,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:44:23,657 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:23,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:44:23,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2022-12-14 05:44:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 4108. [2022-12-14 05:44:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 3614 states have (on average 3.959048146098506) internal successors, (14308), 4107 states have internal predecessors, (14308), 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 05:44:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 14308 transitions. [2022-12-14 05:44:23,724 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 14308 transitions. Word has length 8 [2022-12-14 05:44:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:23,725 INFO L495 AbstractCegarLoop]: Abstraction has 4108 states and 14308 transitions. [2022-12-14 05:44:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 14308 transitions. [2022-12-14 05:44:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:44:23,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:23,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:23,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:23,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:23,927 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:23,928 INFO L85 PathProgramCache]: Analyzing trace with hash 715904223, now seen corresponding path program 1 times [2022-12-14 05:44:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:23,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477005657] [2022-12-14 05:44:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:23,930 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 05:44:23,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:23,933 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:23,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:24,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:44:24,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:24,086 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 05:44:24,087 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 05:44:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:24,121 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 20 [2022-12-14 05:44:24,148 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:44:24,149 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 05:44:24,189 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 05:44:24,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:24,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:24,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477005657] [2022-12-14 05:44:24,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477005657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:24,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:24,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:44:24,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274176831] [2022-12-14 05:44:24,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:24,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:44:24,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:24,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:44:24,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:44:24,191 INFO L87 Difference]: Start difference. First operand 4108 states and 14308 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:24,563 INFO L93 Difference]: Finished difference Result 3877 states and 13592 transitions. [2022-12-14 05:44:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:44:24,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:44:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:24,572 INFO L225 Difference]: With dead ends: 3877 [2022-12-14 05:44:24,572 INFO L226 Difference]: Without dead ends: 3877 [2022-12-14 05:44:24,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 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 05:44:24,573 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:24,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:44:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3877 states. [2022-12-14 05:44:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3877 to 3877. [2022-12-14 05:44:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 3469 states have (on average 3.918132026520611) internal successors, (13592), 3876 states have internal predecessors, (13592), 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 05:44:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 13592 transitions. [2022-12-14 05:44:24,639 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 13592 transitions. Word has length 8 [2022-12-14 05:44:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:24,639 INFO L495 AbstractCegarLoop]: Abstraction has 3877 states and 13592 transitions. [2022-12-14 05:44:24,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:44:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 13592 transitions. [2022-12-14 05:44:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:44:24,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:24,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:24,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:24,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:24,841 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1252776041, now seen corresponding path program 1 times [2022-12-14 05:44:24,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:24,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396414451] [2022-12-14 05:44:24,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:24,844 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 05:44:24,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:24,847 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:24,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:44:25,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:25,109 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 05:44:25,116 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 05:44:25,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:25,178 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 05:44:25,186 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:44:25,186 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 05:44:25,271 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 05:44:25,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:29,692 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 05:44:29,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396414451] [2022-12-14 05:44:29,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396414451] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:44:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [5851064] [2022-12-14 05:44:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:29,693 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:44:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:44:29,694 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:44:29,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 05:44:29,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:44:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:29,906 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 05:44:29,909 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 05:44:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:30,001 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 05:44:30,016 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:44:30,016 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 05:44:30,054 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 05:44:30,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:30,216 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 05:44:30,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [5851064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:44:30,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420885229] [2022-12-14 05:44:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:30,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:44:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:44:30,218 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:44:30,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 05:44:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:30,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:44:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:30,325 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 05:44:30,337 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 05:44:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:30,380 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 05:44:30,388 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:44:30,388 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 05:44:30,446 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 05:44:30,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:30,607 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 05:44:30,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420885229] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:44:30,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:44:30,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2022-12-14 05:44:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251152537] [2022-12-14 05:44:30,607 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:44:30,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:44:30,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:44:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:44:30,608 INFO L87 Difference]: Start difference. First operand 3877 states and 13592 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 05:44:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:47,331 INFO L93 Difference]: Finished difference Result 63897 states and 224640 transitions. [2022-12-14 05:44:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 05:44:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 9 [2022-12-14 05:44:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:47,590 INFO L225 Difference]: With dead ends: 63897 [2022-12-14 05:44:47,590 INFO L226 Difference]: Without dead ends: 63897 [2022-12-14 05:44:47,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 05:44:47,591 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1766 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:47,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1766 Valid, 0 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1584 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-12-14 05:44:47,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63897 states. [2022-12-14 05:44:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63897 to 4112. [2022-12-14 05:44:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4112 states, 3749 states have (on average 4.0821552413977065) internal successors, (15304), 4111 states have internal predecessors, (15304), 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 05:44:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 15304 transitions. [2022-12-14 05:44:48,102 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 15304 transitions. Word has length 9 [2022-12-14 05:44:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:48,102 INFO L495 AbstractCegarLoop]: Abstraction has 4112 states and 15304 transitions. [2022-12-14 05:44:48,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 05:44:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 15304 transitions. [2022-12-14 05:44:48,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:44:48,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:48,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:48,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 05:44:48,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:48,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 05:44:48,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:44:48,706 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1252776040, now seen corresponding path program 1 times [2022-12-14 05:44:48,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:48,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313633384] [2022-12-14 05:44:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:48,709 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 05:44:48,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:48,711 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:48,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:48,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:44:48,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:48,915 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 05:44:48,930 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:44:48,931 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 05:44:48,945 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 05:44:48,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:48,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:48,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313633384] [2022-12-14 05:44:48,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313633384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:48,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:48,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:44:48,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618159293] [2022-12-14 05:44:48,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:48,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:44:48,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:44:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:44:48,947 INFO L87 Difference]: Start difference. First operand 4112 states and 15304 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:44:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:49,354 INFO L93 Difference]: Finished difference Result 3152 states and 11636 transitions. [2022-12-14 05:44:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:44:49,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:44:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:49,362 INFO L225 Difference]: With dead ends: 3152 [2022-12-14 05:44:49,362 INFO L226 Difference]: Without dead ends: 3152 [2022-12-14 05:44:49,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 05:44:49,362 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:49,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:44:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2022-12-14 05:44:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2022-12-14 05:44:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 2939 states have (on average 3.959169785641375) internal successors, (11636), 3151 states have internal predecessors, (11636), 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 05:44:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 11636 transitions. [2022-12-14 05:44:49,407 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 11636 transitions. Word has length 9 [2022-12-14 05:44:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:49,407 INFO L495 AbstractCegarLoop]: Abstraction has 3152 states and 11636 transitions. [2022-12-14 05:44:49,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:44:49,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 11636 transitions. [2022-12-14 05:44:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:44:49,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:49,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:49,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:49,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:49,610 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:49,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:49,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1252776127, now seen corresponding path program 1 times [2022-12-14 05:44:49,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:49,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281500638] [2022-12-14 05:44:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:49,613 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 05:44:49,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:49,615 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:49,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:49,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:44:49,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:49,816 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 05:44:49,816 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 05:44:49,836 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:44:49,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:44:49,849 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:44:49,850 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 05:44:49,858 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 05:44:49,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:44:49,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:49,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281500638] [2022-12-14 05:44:49,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281500638] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:44:49,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:44:49,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:44:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994182741] [2022-12-14 05:44:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:44:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:44:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:44:49,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:44:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:44:49,860 INFO L87 Difference]: Start difference. First operand 3152 states and 11636 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 05:44:50,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:44:50,152 INFO L93 Difference]: Finished difference Result 2426 states and 8814 transitions. [2022-12-14 05:44:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:44:50,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 05:44:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:44:50,158 INFO L225 Difference]: With dead ends: 2426 [2022-12-14 05:44:50,158 INFO L226 Difference]: Without dead ends: 2426 [2022-12-14 05:44:50,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 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 05:44:50,158 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:44:50,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:44:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2022-12-14 05:44:50,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2426. [2022-12-14 05:44:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2311 states have (on average 3.813933362180874) internal successors, (8814), 2425 states have internal predecessors, (8814), 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 05:44:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 8814 transitions. [2022-12-14 05:44:50,205 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 8814 transitions. Word has length 9 [2022-12-14 05:44:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:44:50,205 INFO L495 AbstractCegarLoop]: Abstraction has 2426 states and 8814 transitions. [2022-12-14 05:44:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 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 05:44:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 8814 transitions. [2022-12-14 05:44:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:44:50,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:44:50,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:44:50,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:44:50,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:50,407 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:44:50,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:44:50,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1252776126, now seen corresponding path program 1 times [2022-12-14 05:44:50,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:44:50,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501733845] [2022-12-14 05:44:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:50,411 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 05:44:50,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:44:50,413 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:50,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:44:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:44:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:50,847 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:44:50,848 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 05:44:50,932 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 05:44:50,932 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 05:44:51,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:51,002 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 05:44:51,021 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:44:51,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:44:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:51,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 16 [2022-12-14 05:44:51,094 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 05:44:51,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 05:44:51,160 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 05:44:51,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:44:54,555 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 05:44:54,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:44:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501733845] [2022-12-14 05:44:54,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501733845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:44:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1896001329] [2022-12-14 05:44:54,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:44:54,556 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:44:54,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:44:54,556 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:44:54,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 05:44:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:44:54,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:44:54,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:44:54,892 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:44:54,893 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 05:44:55,012 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 05:44:55,012 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 05:44:55,176 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:44:55,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:44:55,184 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 05:44:55,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:44:55,267 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 05:44:55,274 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:44:55,274 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 05:44:55,322 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 05:44:55,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:45:08,856 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 05:45:08,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1896001329] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:45:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128625542] [2022-12-14 05:45:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:45:08,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:45:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:45:08,858 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:45:08,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 05:45:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:45:08,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:45:08,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:45:09,047 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:45:09,048 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 05:45:09,147 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:45:09,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:45:09,153 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 05:45:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:45:09,230 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 05:45:09,238 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:45:09,238 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 05:45:09,299 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 05:45:09,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:45:14,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 05:45:14,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-12-14 05:45:17,758 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 05:45:17,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128625542] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:45:17,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:45:17,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 17 [2022-12-14 05:45:17,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324296885] [2022-12-14 05:45:17,759 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:45:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 05:45:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:45:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 05:45:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=271, Unknown=3, NotChecked=0, Total=342 [2022-12-14 05:45:17,760 INFO L87 Difference]: Start difference. First operand 2426 states and 8814 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 05:45:49,810 WARN L233 SmtUtils]: Spent 31.70s on a formula simplification. DAG size of input: 51 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:46:18,582 WARN L233 SmtUtils]: Spent 27.71s on a formula simplification. DAG size of input: 75 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:46:47,457 WARN L233 SmtUtils]: Spent 27.17s on a formula simplification. DAG size of input: 68 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:47:10,968 WARN L233 SmtUtils]: Spent 16.71s on a formula simplification. DAG size of input: 50 DAG size of output: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:47:39,754 WARN L233 SmtUtils]: Spent 27.13s on a formula simplification. DAG size of input: 77 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:47:52,580 WARN L233 SmtUtils]: Spent 12.63s on a formula simplification. DAG size of input: 74 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:48:26,987 WARN L233 SmtUtils]: Spent 33.19s on a formula simplification. DAG size of input: 74 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:48:44,211 WARN L233 SmtUtils]: Spent 16.90s on a formula simplification. DAG size of input: 67 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:49:02,166 WARN L233 SmtUtils]: Spent 16.42s 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 05:49:19,126 WARN L233 SmtUtils]: Spent 15.39s on a formula simplification. DAG size of input: 73 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:49:49,270 WARN L233 SmtUtils]: Spent 27.23s on a formula simplification. DAG size of input: 81 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:50:06,862 WARN L233 SmtUtils]: Spent 16.34s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:50:23,142 WARN L233 SmtUtils]: Spent 14.37s on a formula simplification. DAG size of input: 80 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:50:36,755 WARN L233 SmtUtils]: Spent 12.74s on a formula simplification. DAG size of input: 59 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:50:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:38,843 INFO L93 Difference]: Finished difference Result 35863 states and 127497 transitions. [2022-12-14 05:50:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 05:50:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 9 [2022-12-14 05:50:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:38,960 INFO L225 Difference]: With dead ends: 35863 [2022-12-14 05:50:38,960 INFO L226 Difference]: Without dead ends: 35863 [2022-12-14 05:50:38,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 331.5s TimeCoverageRelationStatistics Valid=573, Invalid=1680, Unknown=3, NotChecked=0, Total=2256 [2022-12-14 05:50:38,961 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2004 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:38,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2004 Valid, 0 Invalid, 2090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2022-12-14 05:50:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35863 states. [2022-12-14 05:50:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35863 to 2962. [2022-12-14 05:50:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2875 states have (on average 3.881391304347826) internal successors, (11159), 2961 states have internal predecessors, (11159), 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 05:50:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 11159 transitions. [2022-12-14 05:50:39,239 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 11159 transitions. Word has length 9 [2022-12-14 05:50:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:39,239 INFO L495 AbstractCegarLoop]: Abstraction has 2962 states and 11159 transitions. [2022-12-14 05:50:39,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 05:50:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 11159 transitions. [2022-12-14 05:50:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:50:39,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:39,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:39,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 05:50:39,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 05:50:39,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Forceful destruction successful, exit code 0 [2022-12-14 05:50:39,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:39,843 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:50:39,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash 718186395, now seen corresponding path program 1 times [2022-12-14 05:50:39,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:50:39,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965646479] [2022-12-14 05:50:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:39,845 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 05:50:39,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:50:39,847 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:39,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Waiting until timeout for monitored process [2022-12-14 05:50:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:39,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:50:39,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:39,944 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 05:50:39,960 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 05:50:39,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:39,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:50:39,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965646479] [2022-12-14 05:50:39,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965646479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:39,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:39,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:50:39,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280113202] [2022-12-14 05:50:39,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:39,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:50:39,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:50:39,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:50:39,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:50:39,962 INFO L87 Difference]: Start difference. First operand 2962 states and 11159 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:50:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:40,264 INFO L93 Difference]: Finished difference Result 2148 states and 8045 transitions. [2022-12-14 05:50:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:50:40,264 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:50:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:40,269 INFO L225 Difference]: With dead ends: 2148 [2022-12-14 05:50:40,269 INFO L226 Difference]: Without dead ends: 2148 [2022-12-14 05:50:40,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 05:50:40,270 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:40,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:50:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2022-12-14 05:50:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2148. [2022-12-14 05:50:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2148 states, 2100 states have (on average 3.830952380952381) internal successors, (8045), 2147 states have internal predecessors, (8045), 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 05:50:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 8045 transitions. [2022-12-14 05:50:40,315 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 8045 transitions. Word has length 9 [2022-12-14 05:50:40,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:40,315 INFO L495 AbstractCegarLoop]: Abstraction has 2148 states and 8045 transitions. [2022-12-14 05:50:40,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:50:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 8045 transitions. [2022-12-14 05:50:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:50:40,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:40,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:40,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Ended with exit code 0 [2022-12-14 05:50:40,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:40,517 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:50:40,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash 718186396, now seen corresponding path program 1 times [2022-12-14 05:50:40,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:50:40,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094990697] [2022-12-14 05:50:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:40,520 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 05:50:40,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:50:40,522 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:40,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (27)] Waiting until timeout for monitored process [2022-12-14 05:50:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:40,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:50:40,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:40,632 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 05:50:40,706 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 05:50:40,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:40,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:50:40,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094990697] [2022-12-14 05:50:40,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094990697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:40,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:40,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:50:40,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760377519] [2022-12-14 05:50:40,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:40,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:50:40,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:50:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:50:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:50:40,708 INFO L87 Difference]: Start difference. First operand 2148 states and 8045 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:50:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:41,288 INFO L93 Difference]: Finished difference Result 3776 states and 14333 transitions. [2022-12-14 05:50:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:50:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:41,297 INFO L225 Difference]: With dead ends: 3776 [2022-12-14 05:50:41,297 INFO L226 Difference]: Without dead ends: 3776 [2022-12-14 05:50:41,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:50:41,297 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 118 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:41,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 05:50:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2022-12-14 05:50:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2350. [2022-12-14 05:50:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2302 states have (on average 3.9995655951346656) internal successors, (9207), 2349 states have internal predecessors, (9207), 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 05:50:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 9207 transitions. [2022-12-14 05:50:41,337 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 9207 transitions. Word has length 9 [2022-12-14 05:50:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:41,337 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 9207 transitions. [2022-12-14 05:50:41,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:50:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 9207 transitions. [2022-12-14 05:50:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:50:41,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:41,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:50:41,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 (27)] Forceful destruction successful, exit code 0 [2022-12-14 05:50:41,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:41,539 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:50:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash 718186156, now seen corresponding path program 1 times [2022-12-14 05:50:41,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:50:41,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044706886] [2022-12-14 05:50:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:41,542 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 05:50:41,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:50:41,544 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:41,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:41,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:50:41,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:41,740 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 05:50:41,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:50:41,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:50:41,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044706886] [2022-12-14 05:50:41,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044706886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:50:41,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:50:41,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:50:41,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099893143] [2022-12-14 05:50:41,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:50:41,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:50:41,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:50:41,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:50:41,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:50:41,742 INFO L87 Difference]: Start difference. First operand 2350 states and 9207 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:50:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:50:42,311 INFO L93 Difference]: Finished difference Result 2516 states and 9634 transitions. [2022-12-14 05:50:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:50:42,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:50:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:50:42,317 INFO L225 Difference]: With dead ends: 2516 [2022-12-14 05:50:42,317 INFO L226 Difference]: Without dead ends: 2516 [2022-12-14 05:50:42,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:50:42,317 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:50:42,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:50:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-12-14 05:50:42,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2457. [2022-12-14 05:50:42,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2457 states, 2409 states have (on average 3.950601909506019) internal successors, (9517), 2456 states have internal predecessors, (9517), 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 05:50:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2457 states to 2457 states and 9517 transitions. [2022-12-14 05:50:42,359 INFO L78 Accepts]: Start accepts. Automaton has 2457 states and 9517 transitions. Word has length 9 [2022-12-14 05:50:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:50:42,359 INFO L495 AbstractCegarLoop]: Abstraction has 2457 states and 9517 transitions. [2022-12-14 05:50:42,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:50:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2457 states and 9517 transitions. [2022-12-14 05:50:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 05:50:42,360 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:50:42,360 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-12-14 05:50:42,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:42,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:42,561 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:50:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:50:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash -290776429, now seen corresponding path program 1 times [2022-12-14 05:50:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:50:42,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575738336] [2022-12-14 05:50:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:42,564 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 05:50:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:50:42,567 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:42,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:50:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:50:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:42,775 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 05:50:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:43,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:50:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:44,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:50:44,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575738336] [2022-12-14 05:50:44,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575738336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:50:44,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [728695209] [2022-12-14 05:50:44,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:44,954 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:50:44,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:50:44,955 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:50:44,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 05:50:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:50:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:45,183 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 05:50:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:45,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:50:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:47,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [728695209] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:50:47,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050260430] [2022-12-14 05:50:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:50:47,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:50:47,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:50:47,633 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:50:47,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 05:50:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:50:47,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:50:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:50:47,754 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 05:50:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:47,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:50:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:50:48,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050260430] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:50:48,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:50:48,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-12-14 05:50:48,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495536778] [2022-12-14 05:50:48,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:50:48,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 05:50:48,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:50:48,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 05:50:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 05:50:48,419 INFO L87 Difference]: Start difference. First operand 2457 states and 9517 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 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 05:50:52,330 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 05:50:53,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:50:55,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:50:57,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:50:59,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:00,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:02,787 WARN L539 Checker$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 05:51:04,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:06,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:07,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:09,573 WARN L539 Checker$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 05:51:11,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:13,578 WARN L539 Checker$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 05:51:16,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:18,273 WARN L539 Checker$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 05:51:20,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:22,043 WARN L539 Checker$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 05:51:24,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:26,049 WARN L539 Checker$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 05:51:27,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:29,206 WARN L539 Checker$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 05:51:32,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:36,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:37,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:39,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:41,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:43,563 WARN L539 Checker$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 05:51:45,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:47,568 WARN L539 Checker$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 05:51:49,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:51,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:53,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:51:55,085 WARN L539 Checker$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 05:51:57,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:52:02,039 WARN L539 Checker$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 05:52:03,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:52:05,527 WARN L539 Checker$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 05:52:06,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:52:08,617 WARN L539 Checker$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 05:52:10,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:52:12,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:52:15,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:52:17,941 WARN L539 Checker$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 05:52:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:52:32,156 INFO L93 Difference]: Finished difference Result 28589 states and 112388 transitions. [2022-12-14 05:52:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 05:52:32,158 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 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 05:52:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:52:32,253 INFO L225 Difference]: With dead ends: 28589 [2022-12-14 05:52:32,253 INFO L226 Difference]: Without dead ends: 28589 [2022-12-14 05:52:32,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=798, Invalid=1652, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 05:52:32,254 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2396 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5349 mSolverCounterSat, 225 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2396 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 5349 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:52:32,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2396 Valid, 0 Invalid, 5598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 5349 Invalid, 24 Unknown, 0 Unchecked, 95.3s Time] [2022-12-14 05:52:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28589 states. [2022-12-14 05:52:32,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28589 to 2516. [2022-12-14 05:52:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2468 states have (on average 3.9092382495948135) internal successors, (9648), 2515 states have internal predecessors, (9648), 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 05:52:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 9648 transitions. [2022-12-14 05:52:32,447 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 9648 transitions. Word has length 10 [2022-12-14 05:52:32,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:52:32,447 INFO L495 AbstractCegarLoop]: Abstraction has 2516 states and 9648 transitions. [2022-12-14 05:52:32,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 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 05:52:32,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 9648 transitions. [2022-12-14 05:52:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 05:52:32,448 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:52:32,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:52:32,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Ended with exit code 0 [2022-12-14 05:52:32,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 05:52:32,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 05:52:33,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:52:33,050 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:52:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:52:33,051 INFO L85 PathProgramCache]: Analyzing trace with hash -533041414, now seen corresponding path program 1 times [2022-12-14 05:52:33,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:52:33,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804351773] [2022-12-14 05:52:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:33,052 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 05:52:33,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:52:33,055 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:52:33,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:52:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:52:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:33,263 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 05:52:33,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:52:33,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:52:33,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804351773] [2022-12-14 05:52:33,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804351773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:52:33,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:52:33,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:52:33,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337048708] [2022-12-14 05:52:33,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:52:33,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:52:33,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:52:33,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:52:33,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:52:33,264 INFO L87 Difference]: Start difference. First operand 2516 states and 9648 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 05:52:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:52:34,132 INFO L93 Difference]: Finished difference Result 3270 states and 12116 transitions. [2022-12-14 05:52:34,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:52:34,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 05:52:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:52:34,139 INFO L225 Difference]: With dead ends: 3270 [2022-12-14 05:52:34,139 INFO L226 Difference]: Without dead ends: 3270 [2022-12-14 05:52:34,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:52:34,140 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 05:52:34,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 05:52:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3270 states. [2022-12-14 05:52:34,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3270 to 2858. [2022-12-14 05:52:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2810 states have (on average 3.897508896797153) internal successors, (10952), 2857 states have internal predecessors, (10952), 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 05:52:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 10952 transitions. [2022-12-14 05:52:34,180 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 10952 transitions. Word has length 10 [2022-12-14 05:52:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:52:34,180 INFO L495 AbstractCegarLoop]: Abstraction has 2858 states and 10952 transitions. [2022-12-14 05:52:34,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 05:52:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 10952 transitions. [2022-12-14 05:52:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:52:34,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:52:34,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:52:34,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:52:34,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:52:34,382 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:52:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:52:34,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1326886458, now seen corresponding path program 1 times [2022-12-14 05:52:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:52:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760365554] [2022-12-14 05:52:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:34,384 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 05:52:34,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:52:34,387 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:52:34,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Waiting until timeout for monitored process [2022-12-14 05:52:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:34,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:52:34,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:34,633 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 05:52:34,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:52:34,784 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 05:52:34,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:52:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760365554] [2022-12-14 05:52:34,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760365554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:52:34,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1732803771] [2022-12-14 05:52:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:34,785 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:52:34,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:52:34,786 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:52:34,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 05:52:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:35,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:52:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:35,132 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 05:52:35,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:52:35,162 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 05:52:35,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1732803771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:52:35,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915743412] [2022-12-14 05:52:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:35,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:52:35,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:52:35,163 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:52:35,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 05:52:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:35,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:52:35,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:35,337 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 05:52:35,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:52:35,364 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 05:52:35,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915743412] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:52:35,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:52:35,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-12-14 05:52:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738542214] [2022-12-14 05:52:35,364 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:52:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 05:52:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:52:35,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 05:52:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:52:35,365 INFO L87 Difference]: Start difference. First operand 2858 states and 10952 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 05:52:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:52:37,672 INFO L93 Difference]: Finished difference Result 5435 states and 19819 transitions. [2022-12-14 05:52:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 05:52:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 11 [2022-12-14 05:52:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:52:37,686 INFO L225 Difference]: With dead ends: 5435 [2022-12-14 05:52:37,686 INFO L226 Difference]: Without dead ends: 5435 [2022-12-14 05:52:37,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-12-14 05:52:37,687 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 249 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:52:37,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 0 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 05:52:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5435 states. [2022-12-14 05:52:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5435 to 3705. [2022-12-14 05:52:37,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 3657 states have (on average 3.985233798195242) internal successors, (14574), 3704 states have internal predecessors, (14574), 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 05:52:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 14574 transitions. [2022-12-14 05:52:37,787 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 14574 transitions. Word has length 11 [2022-12-14 05:52:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:52:37,787 INFO L495 AbstractCegarLoop]: Abstraction has 3705 states and 14574 transitions. [2022-12-14 05:52:37,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 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 05:52:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 14574 transitions. [2022-12-14 05:52:37,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:52:37,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:52:37,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:52:37,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 05:52:38,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Ended with exit code 0 [2022-12-14 05:52:38,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-12-14 05:52:38,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:52:38,391 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:52:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:52:38,392 INFO L85 PathProgramCache]: Analyzing trace with hash 717331519, now seen corresponding path program 1 times [2022-12-14 05:52:38,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:52:38,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281176100] [2022-12-14 05:52:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:38,393 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 05:52:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:52:38,396 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:52:38,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:52:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:38,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:52:38,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:38,598 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 05:52:38,682 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 05:52:38,682 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 16 treesize of output 22 [2022-12-14 05:52:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:52:38,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:52:39,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:52:39,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:52:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281176100] [2022-12-14 05:52:39,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281176100] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:52:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [791359733] [2022-12-14 05:52:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:39,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:52:39,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:52:39,880 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:52:39,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 05:52:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:40,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:52:40,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:40,116 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 05:52:40,125 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 05:52:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:52:40,276 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 05:52:40,292 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:52:40,292 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 05:52:40,367 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 05:52:40,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:52:45,635 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 05:52:45,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [791359733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:52:45,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015979406] [2022-12-14 05:52:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:52:45,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:52:45,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:52:45,637 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:52:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 05:52:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:52:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:52:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:52:45,752 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 05:52:45,757 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 05:52:45,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:52:45,893 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 05:52:45,907 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:52:45,907 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 05:52:46,001 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 05:52:46,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:52:48,296 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 05:52:48,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015979406] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:52:48,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:52:48,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 5, 5] total 19 [2022-12-14 05:52:48,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480922475] [2022-12-14 05:52:48,301 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:52:48,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:52:48,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:52:48,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:52:48,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2022-12-14 05:52:48,301 INFO L87 Difference]: Start difference. First operand 3705 states and 14574 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 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 05:53:25,687 WARN L233 SmtUtils]: Spent 36.95s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:53:34,451 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:53:54,991 WARN L233 SmtUtils]: Spent 19.43s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:54:36,886 WARN L233 SmtUtils]: Spent 41.57s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:54:44,812 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:55:13,283 WARN L233 SmtUtils]: Spent 21.21s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:55:20,403 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:55:36,554 WARN L233 SmtUtils]: Spent 15.66s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:55:55,390 WARN L233 SmtUtils]: Spent 10.65s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:56:16,157 WARN L233 SmtUtils]: Spent 20.16s on a formula simplification. DAG size of input: 62 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 05:56:23,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:56:23,998 INFO L93 Difference]: Finished difference Result 25679 states and 96413 transitions. [2022-12-14 05:56:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 05:56:23,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 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 05:56:23,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:56:24,079 INFO L225 Difference]: With dead ends: 25679 [2022-12-14 05:56:24,079 INFO L226 Difference]: Without dead ends: 25679 [2022-12-14 05:56:24,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 216.3s TimeCoverageRelationStatistics Valid=586, Invalid=1962, Unknown=2, NotChecked=0, Total=2550 [2022-12-14 05:56:24,080 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1962 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:56:24,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1962 Valid, 0 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-12-14 05:56:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25679 states. [2022-12-14 05:56:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25679 to 3737. [2022-12-14 05:56:24,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3698 states have (on average 3.954299621416982) internal successors, (14623), 3736 states have internal predecessors, (14623), 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 05:56:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 14623 transitions. [2022-12-14 05:56:24,308 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 14623 transitions. Word has length 11 [2022-12-14 05:56:24,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:56:24,308 INFO L495 AbstractCegarLoop]: Abstraction has 3737 states and 14623 transitions. [2022-12-14 05:56:24,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 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 05:56:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 14623 transitions. [2022-12-14 05:56:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:56:24,309 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:56:24,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:56:24,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 05:56:24,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 05:56:24,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:24,913 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:56:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:56:24,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1303854111, now seen corresponding path program 1 times [2022-12-14 05:56:24,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:56:24,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36094963] [2022-12-14 05:56:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:56:24,915 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 05:56:24,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:56:24,918 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:24,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:56:25,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:56:25,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:56:25,078 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 05:56:25,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:56:25,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:56:25,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36094963] [2022-12-14 05:56:25,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36094963] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:56:25,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:56:25,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:56:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087909054] [2022-12-14 05:56:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:56:25,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:56:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:56:25,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:56:25,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:56:25,079 INFO L87 Difference]: Start difference. First operand 3737 states and 14623 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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 05:56:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:56:25,690 INFO L93 Difference]: Finished difference Result 4063 states and 15458 transitions. [2022-12-14 05:56:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:56:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 05:56:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:56:25,698 INFO L225 Difference]: With dead ends: 4063 [2022-12-14 05:56:25,699 INFO L226 Difference]: Without dead ends: 4063 [2022-12-14 05:56:25,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:56:25,699 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:56:25,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:56:25,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2022-12-14 05:56:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3967. [2022-12-14 05:56:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3967 states, 3928 states have (on average 3.8821283095723014) internal successors, (15249), 3966 states have internal predecessors, (15249), 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 05:56:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3967 states to 3967 states and 15249 transitions. [2022-12-14 05:56:25,765 INFO L78 Accepts]: Start accepts. Automaton has 3967 states and 15249 transitions. Word has length 11 [2022-12-14 05:56:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:56:25,765 INFO L495 AbstractCegarLoop]: Abstraction has 3967 states and 15249 transitions. [2022-12-14 05:56:25,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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 05:56:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3967 states and 15249 transitions. [2022-12-14 05:56:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:56:25,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:56:25,766 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 05:56:25,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:25,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:25,967 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:56:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:56:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 739258698, now seen corresponding path program 3 times [2022-12-14 05:56:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:56:25,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402498856] [2022-12-14 05:56:25,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:56:25,971 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 05:56:25,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:56:25,974 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:25,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:56:26,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:56:26,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:56:26,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:56:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:56:26,407 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:56:26,408 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 05:56:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:56:26,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:56:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:56:29,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:56:29,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402498856] [2022-12-14 05:56:29,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402498856] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:56:29,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422496751] [2022-12-14 05:56:29,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:56:29,557 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:56:29,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:56:29,557 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:56:29,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 05:56:30,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:56:30,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:56:30,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:56:30,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:56:30,258 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:56:30,258 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 05:56:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:56:30,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:56:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:56:30,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422496751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:56:30,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816886167] [2022-12-14 05:56:30,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:56:30,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:56:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:56:30,749 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:56:30,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 05:56:31,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:56:31,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:56:31,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:56:31,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:56:31,902 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:56:31,902 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 05:56:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:56:32,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:56:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:56:32,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816886167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:56:32,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:56:32,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-12-14 05:56:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688770661] [2022-12-14 05:56:32,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:56:32,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 05:56:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:56:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 05:56:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-14 05:56:32,440 INFO L87 Difference]: Start difference. First operand 3967 states and 15249 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 05:56:46,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:56:48,495 WARN L539 Checker$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 05:56:50,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:56:52,235 WARN L539 Checker$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 05:56:54,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:56:56,331 WARN L539 Checker$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 05:56:58,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:57:00,336 WARN L539 Checker$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 05:57:02,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:57:04,342 WARN L539 Checker$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 05:57:09,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:57:11,149 WARN L539 Checker$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 05:57:12,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:57:14,908 WARN L539 Checker$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 05:57:16,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:57:18,967 WARN L539 Checker$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 05:57:20,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:57:22,973 WARN L539 Checker$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 05:57:24,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:57:26,978 WARN L539 Checker$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 05:57:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:57:37,151 INFO L93 Difference]: Finished difference Result 40495 states and 158977 transitions. [2022-12-14 05:57:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 05:57:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 12 [2022-12-14 05:57:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:57:37,301 INFO L225 Difference]: With dead ends: 40495 [2022-12-14 05:57:37,302 INFO L226 Difference]: Without dead ends: 40495 [2022-12-14 05:57:37,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:57:37,302 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3134 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5447 mSolverCounterSat, 387 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3134 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 5447 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:57:37,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3134 Valid, 0 Invalid, 5852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 5447 Invalid, 18 Unknown, 0 Unchecked, 50.9s Time] [2022-12-14 05:57:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40495 states. [2022-12-14 05:57:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40495 to 3987. [2022-12-14 05:57:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3987 states, 3948 states have (on average 3.867274569402229) internal successors, (15268), 3986 states have internal predecessors, (15268), 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 05:57:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3987 states to 3987 states and 15268 transitions. [2022-12-14 05:57:37,621 INFO L78 Accepts]: Start accepts. Automaton has 3987 states and 15268 transitions. Word has length 12 [2022-12-14 05:57:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:57:37,621 INFO L495 AbstractCegarLoop]: Abstraction has 3987 states and 15268 transitions. [2022-12-14 05:57:37,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 05:57:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3987 states and 15268 transitions. [2022-12-14 05:57:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:57:37,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:57:37,622 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:57:37,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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)] Ended with exit code 0 [2022-12-14 05:57:37,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-12-14 05:57:38,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 05:57:38,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:57:38,224 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:57:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:57:38,225 INFO L85 PathProgramCache]: Analyzing trace with hash 863569500, now seen corresponding path program 2 times [2022-12-14 05:57:38,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:57:38,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425814743] [2022-12-14 05:57:38,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:57:38,226 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 05:57:38,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:57:38,229 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:57:38,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:57:38,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:57:38,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:57:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:57:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:57:38,641 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 05:57:38,641 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 05:57:38,762 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 05:57:38,762 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 05:57:38,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:57:38,852 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 05:57:38,877 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 05:57:38,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 05:57:38,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:57:38,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 16 [2022-12-14 05:57:38,985 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 05:57:38,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 05:57:39,049 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 05:57:39,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:57:39,049 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:57:39,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425814743] [2022-12-14 05:57:39,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425814743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:57:39,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:57:39,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:57:39,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594999076] [2022-12-14 05:57:39,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:57:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:57:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:57:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:57:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:57:39,050 INFO L87 Difference]: Start difference. First operand 3987 states and 15268 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 05:57:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:57:39,740 INFO L93 Difference]: Finished difference Result 5191 states and 19538 transitions. [2022-12-14 05:57:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:57:39,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 12 [2022-12-14 05:57:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:57:39,753 INFO L225 Difference]: With dead ends: 5191 [2022-12-14 05:57:39,753 INFO L226 Difference]: Without dead ends: 5191 [2022-12-14 05:57:39,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:57:39,753 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:57:39,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:57:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2022-12-14 05:57:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 3494. [2022-12-14 05:57:39,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3494 states, 3455 states have (on average 3.846888567293777) internal successors, (13291), 3493 states have internal predecessors, (13291), 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 05:57:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3494 states to 3494 states and 13291 transitions. [2022-12-14 05:57:39,814 INFO L78 Accepts]: Start accepts. Automaton has 3494 states and 13291 transitions. Word has length 12 [2022-12-14 05:57:39,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:57:39,814 INFO L495 AbstractCegarLoop]: Abstraction has 3494 states and 13291 transitions. [2022-12-14 05:57:39,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 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 05:57:39,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3494 states and 13291 transitions. [2022-12-14 05:57:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:57:39,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:57:39,815 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:57:39,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:57:40,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:57:40,017 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-14 05:57:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:57:40,018 INFO L85 PathProgramCache]: Analyzing trace with hash -57285216, now seen corresponding path program 2 times [2022-12-14 05:57:40,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:57:40,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517548931] [2022-12-14 05:57:40,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:57:40,020 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 05:57:40,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:57:40,023 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:57:40,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/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 05:57:40,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:57:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:57:40,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:57:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:57:40,235 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 05:57:40,240 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 05:57:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:57:40,282 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 05:57:40,295 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 05:57:40,295 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 05:57:40,410 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 05:57:40,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:57:42,866 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 05:57:42,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:57:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517548931] [2022-12-14 05:57:42,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517548931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:57:42,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2090142168] [2022-12-14 05:57:42,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:57:42,866 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:57:42,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:57:42,867 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:57:42,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 05:57:43,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:57:43,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:57:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:57:43,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:57:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:57:43,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:57:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:57:43,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2090142168] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:57:43,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739759689] [2022-12-14 05:57:43,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:57:43,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:57:43,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:57:43,609 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:57:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c378a2ab-279c-4b45-b9cd-dad02c8a5c4d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 05:57:43,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:57:43,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:57:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:57:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:57:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:57:43,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:57:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:57:44,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739759689] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:57:44,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:57:44,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 24 [2022-12-14 05:57:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964587067] [2022-12-14 05:57:44,051 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:57:44,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 05:57:44,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:57:44,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 05:57:44,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:57:44,051 INFO L87 Difference]: Start difference. First operand 3494 states and 13291 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 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)