./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- 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 08:03:52,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:03:52,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:03:52,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:03:52,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:03:52,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:03:52,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:03:52,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:03:52,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:03:52,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:03:52,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:03:52,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:03:52,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:03:52,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:03:52,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:03:52,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:03:52,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:03:52,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:03:53,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:03:53,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:03:53,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:03:53,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:03:53,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:03:53,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:03:53,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:03:53,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:03:53,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:03:53,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:03:53,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:03:53,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:03:53,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:03:53,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:03:53,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:03:53,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:03:53,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:03:53,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:03:53,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:03:53,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:03:53,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:03:53,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:03:53,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:03:53,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:03:53,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:03:53,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:03:53,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:03:53,071 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:03:53,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:03:53,072 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:03:53,072 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:03:53,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:03:53,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:03:53,073 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:03:53,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:03:53,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:03:53,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:03:53,073 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:03:53,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:03:53,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:03:53,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:03:53,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:03:53,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:03:53,075 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:03:53,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:03:53,075 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:03:53,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:03:53,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:03:53,075 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_448cf4e2-203f-4c21-b27c-13e8926aa05a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-12-14 08:03:53,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:03:53,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:03:53,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:03:53,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:03:53,289 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:03:53,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-14 08:03:55,802 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:03:55,958 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:03:55,958 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-14 08:03:55,963 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data/c0bc48e17/fe042d147dd046e08d1e083495698e2c/FLAGfaacb180b [2022-12-14 08:03:56,380 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data/c0bc48e17/fe042d147dd046e08d1e083495698e2c [2022-12-14 08:03:56,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:03:56,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:03:56,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:03:56,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:03:56,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:03:56,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:03:56" (1/1) ... [2022-12-14 08:03:56,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@130afcdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:03:56, skipping insertion in model container [2022-12-14 08:03:56,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:03:56" (1/1) ... [2022-12-14 08:03:56,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:03:56,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:03:56,510 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:03:56,511 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:03:56,514 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:03:56,515 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:03:56,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:03:56,516 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:03:56,522 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_448cf4e2-203f-4c21-b27c-13e8926aa05a/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-14 08:03:56,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:03:56,537 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 08:03:56,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f944b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:03:56, skipping insertion in model container [2022-12-14 08:03:56,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:03:56,538 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 08:03:56,539 INFO L158 Benchmark]: Toolchain (without parser) took 155.65ms. Allocated memory is still 184.5MB. Free memory was 150.6MB in the beginning and 140.2MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:03:56,540 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 104.9MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:03:56,540 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.09ms. Allocated memory is still 184.5MB. Free memory was 150.0MB in the beginning and 140.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:03:56,541 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 104.9MB. Free memory is still 72.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 154.09ms. Allocated memory is still 184.5MB. Free memory was 150.0MB in the beginning and 140.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- 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 08:03:57,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:03:57,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:03:57,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:03:57,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:03:57,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:03:57,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:03:57,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:03:57,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:03:57,929 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:03:57,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:03:57,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:03:57,931 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:03:57,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:03:57,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:03:57,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:03:57,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:03:57,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:03:57,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:03:57,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:03:57,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:03:57,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:03:57,939 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:03:57,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:03:57,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:03:57,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:03:57,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:03:57,943 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:03:57,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:03:57,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:03:57,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:03:57,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:03:57,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:03:57,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:03:57,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:03:57,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:03:57,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:03:57,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:03:57,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:03:57,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:03:57,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:03:57,957 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 08:03:57,974 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:03:57,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:03:57,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:03:57,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:03:57,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:03:57,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:03:57,976 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:03:57,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:03:57,976 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:03:57,976 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:03:57,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:03:57,976 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:03:57,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:03:57,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:03:57,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:03:57,977 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:03:57,977 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:03:57,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:03:57,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:03:57,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:03:57,978 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:03:57,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:03:57,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 08:03:57,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:03:57,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:03:57,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:03:57,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:03:57,979 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 08:03:57,979 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 08:03:57,980 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:03:57,980 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 08:03:57,980 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_448cf4e2-203f-4c21-b27c-13e8926aa05a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-12-14 08:03:58,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:03:58,225 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:03:58,227 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:03:58,228 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:03:58,228 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:03:58,229 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-14 08:04:00,863 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:04:01,025 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:04:01,026 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-12-14 08:04:01,032 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data/8cd1807b0/6df877f523a14c748d1c71f1c32a0f1a/FLAG586f230a4 [2022-12-14 08:04:01,046 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/data/8cd1807b0/6df877f523a14c748d1c71f1c32a0f1a [2022-12-14 08:04:01,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:04:01,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:04:01,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:04:01,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:04:01,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:04:01,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cdc0a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01, skipping insertion in model container [2022-12-14 08:04:01,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:04:01,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:04:01,197 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,199 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,202 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,202 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,204 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,204 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,210 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_448cf4e2-203f-4c21-b27c-13e8926aa05a/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-14 08:04:01,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:04:01,227 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 08:04:01,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:04:01,233 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,234 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,235 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,236 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,237 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,241 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_448cf4e2-203f-4c21-b27c-13e8926aa05a/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-14 08:04:01,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:04:01,247 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:04:01,258 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,259 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,260 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,261 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:04:01,262 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:04:01,266 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_448cf4e2-203f-4c21-b27c-13e8926aa05a/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-12-14 08:04:01,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:04:01,281 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:04:01,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01 WrapperNode [2022-12-14 08:04:01,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:04:01,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:04:01,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:04:01,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:04:01,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,310 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-12-14 08:04:01,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:04:01,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:04:01,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:04:01,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:04:01,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,340 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:04:01,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:04:01,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:04:01,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:04:01,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (1/1) ... [2022-12-14 08:04:01,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:04:01,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:04:01,372 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:04:01,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:04:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:04:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 08:04:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 08:04:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 08:04:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 08:04:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:04:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:04:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 08:04:01,404 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 08:04:01,500 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:04:01,502 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:04:01,917 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:04:01,992 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:04:01,992 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 08:04:01,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:04:01 BoogieIcfgContainer [2022-12-14 08:04:01,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:04:01,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:04:01,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:04:01,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:04:01,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:04:01" (1/3) ... [2022-12-14 08:04:01,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4078e746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:04:01, skipping insertion in model container [2022-12-14 08:04:01,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:04:01" (2/3) ... [2022-12-14 08:04:01,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4078e746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:04:01, skipping insertion in model container [2022-12-14 08:04:01,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:04:01" (3/3) ... [2022-12-14 08:04:01,999 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-12-14 08:04:02,012 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:04:02,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 08:04:02,013 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 08:04:02,069 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 08:04:02,093 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 08:04:02,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-12-14 08:04:02,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-12-14 08:04:02,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-12-14 08:04:02,150 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-12-14 08:04:02,150 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 08:04:02,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-12-14 08:04:02,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-14 08:04:21,443 INFO L134 LiptonReduction]: Checked pairs total: 3606 [2022-12-14 08:04:21,443 INFO L136 LiptonReduction]: Total number of compositions: 175 [2022-12-14 08:04:21,449 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-12-14 08:04:21,511 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 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 08:04:21,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:04:21,532 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;@1fca69b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:04:21,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-14 08:04:21,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 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 08:04:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:04:21,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:21,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:04:21,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 23174, now seen corresponding path program 1 times [2022-12-14 08:04:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:21,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329747033] [2022-12-14 08:04:21,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:21,559 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 08:04:21,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:21,560 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:21,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:04:21,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:21,793 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:21,794 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 08:04:21,835 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 08:04:21,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:21,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:21,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329747033] [2022-12-14 08:04:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329747033] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:21,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:21,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:04:21,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313740732] [2022-12-14 08:04:21,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:21,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:21,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:21,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:04:21,871 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 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 08:04:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:22,233 INFO L93 Difference]: Finished difference Result 1496 states and 5128 transitions. [2022-12-14 08:04:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:22,235 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 08:04:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:22,259 INFO L225 Difference]: With dead ends: 1496 [2022-12-14 08:04:22,259 INFO L226 Difference]: Without dead ends: 1496 [2022-12-14 08:04:22,260 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 08:04:22,263 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:22,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 6 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:04:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-12-14 08:04:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 750. [2022-12-14 08:04:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.165316045380875) internal successors, (2570), 749 states have internal predecessors, (2570), 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 08:04:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2570 transitions. [2022-12-14 08:04:22,349 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2570 transitions. Word has length 2 [2022-12-14 08:04:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:22,350 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2570 transitions. [2022-12-14 08:04:22,350 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 08:04:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2570 transitions. [2022-12-14 08:04:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:04:22,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:22,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:04:22,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:22,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:22,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:22,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:22,555 INFO L85 PathProgramCache]: Analyzing trace with hash 23324, now seen corresponding path program 1 times [2022-12-14 08:04:22,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:22,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932443972] [2022-12-14 08:04:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:22,557 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 08:04:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:22,561 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:22,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:04:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:22,764 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 08:04:22,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:22,764 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:22,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932443972] [2022-12-14 08:04:22,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932443972] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:22,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:22,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:04:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619821704] [2022-12-14 08:04:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:22,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:04:22,766 INFO L87 Difference]: Start difference. First operand 750 states and 2570 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 08:04:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:22,960 INFO L93 Difference]: Finished difference Result 751 states and 2567 transitions. [2022-12-14 08:04:22,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:22,961 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 08:04:22,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:22,965 INFO L225 Difference]: With dead ends: 751 [2022-12-14 08:04:22,965 INFO L226 Difference]: Without dead ends: 751 [2022-12-14 08:04:22,966 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 08:04:22,971 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:22,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:04:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-12-14 08:04:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 750. [2022-12-14 08:04:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.160453808752026) internal successors, (2567), 749 states have internal predecessors, (2567), 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 08:04:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2567 transitions. [2022-12-14 08:04:22,989 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2567 transitions. Word has length 2 [2022-12-14 08:04:22,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:22,989 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2567 transitions. [2022-12-14 08:04:22,989 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 08:04:22,989 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2567 transitions. [2022-12-14 08:04:22,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:04:22,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:22,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:04:22,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:23,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:23,190 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:23,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:23,191 INFO L85 PathProgramCache]: Analyzing trace with hash 23173, now seen corresponding path program 1 times [2022-12-14 08:04:23,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:23,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390342846] [2022-12-14 08:04:23,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:23,192 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 08:04:23,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:23,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:23,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:04:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:23,295 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 08:04:23,295 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 08:04:23,305 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 08:04:23,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:23,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:23,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390342846] [2022-12-14 08:04:23,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390342846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:23,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:23,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:04:23,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629323816] [2022-12-14 08:04:23,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:23,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:23,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:23,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:04:23,307 INFO L87 Difference]: Start difference. First operand 750 states and 2567 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 08:04:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:23,444 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-12-14 08:04:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:23,444 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 08:04:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:23,448 INFO L225 Difference]: With dead ends: 749 [2022-12-14 08:04:23,448 INFO L226 Difference]: Without dead ends: 749 [2022-12-14 08:04:23,448 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 08:04:23,449 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:23,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:04:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-12-14 08:04:23,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-12-14 08:04:23,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 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 08:04:23,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-12-14 08:04:23,465 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-12-14 08:04:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:23,465 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-12-14 08:04:23,465 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 08:04:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-12-14 08:04:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:04:23,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:23,466 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:04:23,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 08:04:23,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:23,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:23,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:23,667 INFO L85 PathProgramCache]: Analyzing trace with hash 722875, now seen corresponding path program 1 times [2022-12-14 08:04:23,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:23,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282639057] [2022-12-14 08:04:23,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:23,667 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 08:04:23,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:23,668 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:23,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 08:04:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:23,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:04:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:23,859 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:23,859 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 08:04:23,920 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 08:04:23,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:24,108 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 08:04:24,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282639057] [2022-12-14 08:04:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282639057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [301144570] [2022-12-14 08:04:24,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:24,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:24,110 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:24,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 08:04:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:24,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:04:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:24,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:24,300 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 08:04:24,326 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 08:04:24,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:24,386 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 08:04:24,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [301144570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:24,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654342376] [2022-12-14 08:04:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:24,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:24,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:04:24,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:04:24,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:04:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:04:24,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:24,558 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:24,558 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 08:04:24,588 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 08:04:24,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:24,694 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 08:04:24,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654342376] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:24,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:04:24,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 08:04:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787070825] [2022-12-14 08:04:24,694 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:04:24,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:04:24,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:04:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:04:24,695 INFO L87 Difference]: Start difference. First operand 749 states and 2565 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 08:04:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:26,098 INFO L93 Difference]: Finished difference Result 2242 states and 7693 transitions. [2022-12-14 08:04:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:04:26,099 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 08:04:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:26,107 INFO L225 Difference]: With dead ends: 2242 [2022-12-14 08:04:26,107 INFO L226 Difference]: Without dead ends: 2242 [2022-12-14 08:04:26,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:04:26,108 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 237 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:26,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 15 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 08:04:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-12-14 08:04:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 752. [2022-12-14 08:04:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 620 states have (on average 4.156451612903226) internal successors, (2577), 751 states have internal predecessors, (2577), 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 08:04:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2577 transitions. [2022-12-14 08:04:26,133 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2577 transitions. Word has length 3 [2022-12-14 08:04:26,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:26,140 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2577 transitions. [2022-12-14 08:04:26,140 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 08:04:26,140 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2577 transitions. [2022-12-14 08:04:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:04:26,140 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:26,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:04:26,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 08:04:26,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 08:04:26,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:04:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:26,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:26,745 INFO L85 PathProgramCache]: Analyzing trace with hash 723025, now seen corresponding path program 1 times [2022-12-14 08:04:26,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:26,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61056644] [2022-12-14 08:04:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:26,746 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 08:04:26,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:26,748 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:26,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:04:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:26,874 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-14 08:04:26,874 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-14 08:04:26,921 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 08:04:26,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:26,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:26,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61056644] [2022-12-14 08:04:26,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61056644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:26,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:26,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:04:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531697884] [2022-12-14 08:04:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:26,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:04:26,923 INFO L87 Difference]: Start difference. First operand 752 states and 2577 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:27,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:27,069 INFO L93 Difference]: Finished difference Result 626 states and 2073 transitions. [2022-12-14 08:04:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:04:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:27,072 INFO L225 Difference]: With dead ends: 626 [2022-12-14 08:04:27,072 INFO L226 Difference]: Without dead ends: 626 [2022-12-14 08:04:27,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:04:27,073 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:27,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:04:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-12-14 08:04:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2022-12-14 08:04:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 522 states have (on average 3.971264367816092) internal successors, (2073), 625 states have internal predecessors, (2073), 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 08:04:27,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2073 transitions. [2022-12-14 08:04:27,084 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2073 transitions. Word has length 3 [2022-12-14 08:04:27,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:27,084 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 2073 transitions. [2022-12-14 08:04:27,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2073 transitions. [2022-12-14 08:04:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:04:27,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:27,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:04:27,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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)] Ended with exit code 0 [2022-12-14 08:04:27,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:27,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:27,286 INFO L85 PathProgramCache]: Analyzing trace with hash 723026, now seen corresponding path program 1 times [2022-12-14 08:04:27,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:27,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602511912] [2022-12-14 08:04:27,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:27,287 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 08:04:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:27,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:27,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:27,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:04:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:27,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:27,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:27,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:27,414 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 08:04:27,415 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-14 08:04:27,433 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 08:04:27,434 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 23 treesize of output 19 [2022-12-14 08:04:27,496 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 08:04:27,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:27,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:27,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602511912] [2022-12-14 08:04:27,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602511912] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:04:27,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:04:27,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-14 08:04:27,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221924620] [2022-12-14 08:04:27,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:27,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:04:27,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:04:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:04:27,612 INFO L87 Difference]: Start difference. First operand 626 states and 2073 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:27,767 INFO L93 Difference]: Finished difference Result 500 states and 1569 transitions. [2022-12-14 08:04:27,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:27,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:04:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:27,773 INFO L225 Difference]: With dead ends: 500 [2022-12-14 08:04:27,773 INFO L226 Difference]: Without dead ends: 500 [2022-12-14 08:04:27,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:04:27,774 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:27,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:04:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-12-14 08:04:27,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-12-14 08:04:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.7004716981132075) internal successors, (1569), 499 states have internal predecessors, (1569), 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 08:04:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1569 transitions. [2022-12-14 08:04:27,788 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1569 transitions. Word has length 3 [2022-12-14 08:04:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:27,788 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1569 transitions. [2022-12-14 08:04:27,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1569 transitions. [2022-12-14 08:04:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:04:27,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:27,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:04:27,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:27,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:27,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 694842809, now seen corresponding path program 1 times [2022-12-14 08:04:27,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:27,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780632677] [2022-12-14 08:04:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:27,994 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 08:04:27,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:27,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:28,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 08:04:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:04:28,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:28,153 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 08:04:28,153 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 4 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 08:04:28,239 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 08:04:28,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:28,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:28,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780632677] [2022-12-14 08:04:28,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780632677] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:28,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:28,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:04:28,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423575342] [2022-12-14 08:04:28,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:28,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:28,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:28,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:04:28,241 INFO L87 Difference]: Start difference. First operand 500 states and 1569 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:28,371 INFO L93 Difference]: Finished difference Result 470 states and 1484 transitions. [2022-12-14 08:04:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:28,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 08:04:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:28,373 INFO L225 Difference]: With dead ends: 470 [2022-12-14 08:04:28,373 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 08:04:28,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 08:04:28,374 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:28,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:04:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 08:04:28,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-12-14 08:04:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6551724137931036) internal successors, (1484), 469 states have internal predecessors, (1484), 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 08:04:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1484 transitions. [2022-12-14 08:04:28,382 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1484 transitions. Word has length 5 [2022-12-14 08:04:28,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:28,382 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1484 transitions. [2022-12-14 08:04:28,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:28,382 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1484 transitions. [2022-12-14 08:04:28,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:04:28,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:28,383 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:04:28,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 08:04:28,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:28,585 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash 694842808, now seen corresponding path program 1 times [2022-12-14 08:04:28,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:28,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890379091] [2022-12-14 08:04:28,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:28,587 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 08:04:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:28,590 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:28,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 08:04:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:04:28,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:28,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:28,800 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 08:04:28,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-14 08:04:28,808 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 08:04:28,976 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 08:04:28,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:29,157 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 08:04:29,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890379091] [2022-12-14 08:04:29,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890379091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774295031] [2022-12-14 08:04:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:29,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:29,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:29,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:29,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 08:04:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:04:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:29,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:29,358 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 08:04:29,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-14 08:04:29,369 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 39 treesize of output 37 [2022-12-14 08:04:29,427 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 08:04:29,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:29,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1774295031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:29,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:04:29,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 08:04:29,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822577670] [2022-12-14 08:04:29,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:29,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:04:29,429 INFO L87 Difference]: Start difference. First operand 470 states and 1484 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:29,541 INFO L93 Difference]: Finished difference Result 440 states and 1399 transitions. [2022-12-14 08:04:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:29,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 08:04:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:29,544 INFO L225 Difference]: With dead ends: 440 [2022-12-14 08:04:29,544 INFO L226 Difference]: Without dead ends: 440 [2022-12-14 08:04:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:04:29,544 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:29,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:04:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-14 08:04:29,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-12-14 08:04:29,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6056701030927836) internal successors, (1399), 439 states have internal predecessors, (1399), 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 08:04:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1399 transitions. [2022-12-14 08:04:29,551 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1399 transitions. Word has length 5 [2022-12-14 08:04:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:29,552 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1399 transitions. [2022-12-14 08:04:29,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1399 transitions. [2022-12-14 08:04:29,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:04:29,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:29,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:04:29,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 08:04:29,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:29,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:29,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash 65285545, now seen corresponding path program 1 times [2022-12-14 08:04:29,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:29,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224473355] [2022-12-14 08:04:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:29,957 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 08:04:29,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:29,960 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:29,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:30,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:04:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:30,129 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 08:04:30,129 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 08:04:30,144 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 08:04:30,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:30,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224473355] [2022-12-14 08:04:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224473355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:30,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:30,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:04:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220053795] [2022-12-14 08:04:30,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:30,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:04:30,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:04:30,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:04:30,146 INFO L87 Difference]: Start difference. First operand 440 states and 1399 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 08:04:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:30,260 INFO L93 Difference]: Finished difference Result 258 states and 798 transitions. [2022-12-14 08:04:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:04:30,261 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 08:04:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:30,262 INFO L225 Difference]: With dead ends: 258 [2022-12-14 08:04:30,262 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 08:04:30,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:04:30,262 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:30,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:04:30,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 08:04:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 08:04:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 237 states have (on average 3.367088607594937) internal successors, (798), 257 states have internal predecessors, (798), 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 08:04:30,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 798 transitions. [2022-12-14 08:04:30,266 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 798 transitions. Word has length 6 [2022-12-14 08:04:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:30,267 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 798 transitions. [2022-12-14 08:04:30,267 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 08:04:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 798 transitions. [2022-12-14 08:04:30,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:04:30,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:30,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:04:30,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:30,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:30,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:30,469 INFO L85 PathProgramCache]: Analyzing trace with hash 65285546, now seen corresponding path program 1 times [2022-12-14 08:04:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:30,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185375072] [2022-12-14 08:04:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:30,471 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 08:04:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:30,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:30,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:30,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:04:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:30,617 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 08:04:30,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:30,763 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 25 treesize of output 21 [2022-12-14 08:04:30,813 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 08:04:30,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:30,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185375072] [2022-12-14 08:04:30,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185375072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:30,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2038761101] [2022-12-14 08:04:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:30,814 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:30,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:30,815 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:30,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 08:04:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:30,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:04:30,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:30,990 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:30,991 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 08:04:31,204 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 08:04:31,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:31,476 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 08:04:31,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2038761101] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:31,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513288370] [2022-12-14 08:04:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:31,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:04:31,477 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:04:31,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 08:04:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:31,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:04:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:31,627 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:31,627 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 08:04:31,830 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 08:04:31,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:31,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513288370] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:04:31,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-12-14 08:04:31,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4, 4] total 19 [2022-12-14 08:04:31,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338171544] [2022-12-14 08:04:31,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:31,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:04:31,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:31,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:04:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:04:31,990 INFO L87 Difference]: Start difference. First operand 258 states and 798 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 08:04:32,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:32,571 INFO L93 Difference]: Finished difference Result 408 states and 1256 transitions. [2022-12-14 08:04:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:04:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 08:04:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:32,574 INFO L225 Difference]: With dead ends: 408 [2022-12-14 08:04:32,574 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 08:04:32,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:04:32,574 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:32,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 7 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:04:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 08:04:32,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 308. [2022-12-14 08:04:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 287 states have (on average 3.5261324041811846) internal successors, (1012), 307 states have internal predecessors, (1012), 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 08:04:32,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1012 transitions. [2022-12-14 08:04:32,580 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1012 transitions. Word has length 6 [2022-12-14 08:04:32,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:32,580 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 1012 transitions. [2022-12-14 08:04:32,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 08:04:32,580 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1012 transitions. [2022-12-14 08:04:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:04:32,580 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:32,580 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 08:04:32,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 08:04:32,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:32,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:33,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:33,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash 64782278, now seen corresponding path program 2 times [2022-12-14 08:04:33,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:33,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380880116] [2022-12-14 08:04:33,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:04:33,185 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 08:04:33,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:33,188 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:33,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:33,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:04:33,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:04:33,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:04:33,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:33,375 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:33,376 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 08:04:33,486 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 08:04:33,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:34,019 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 08:04:34,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380880116] [2022-12-14 08:04:34,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380880116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1271320567] [2022-12-14 08:04:34,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:04:34,020 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:34,020 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:34,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 08:04:34,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:04:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:04:34,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:04:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:34,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:34,249 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 08:04:34,319 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 08:04:34,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:35,077 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 08:04:35,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1271320567] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:35,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528330193] [2022-12-14 08:04:35,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:04:35,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:35,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:04:35,078 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:04:35,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 08:04:35,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:04:35,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:04:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:04:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:35,235 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:35,236 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 08:04:35,293 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 08:04:35,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:35,423 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 08:04:35,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528330193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:35,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:04:35,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 08:04:35,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012108537] [2022-12-14 08:04:35,424 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:04:35,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:04:35,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:35,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:04:35,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:04:35,425 INFO L87 Difference]: Start difference. First operand 308 states and 1012 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:39,301 INFO L93 Difference]: Finished difference Result 2722 states and 9032 transitions. [2022-12-14 08:04:39,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:04:39,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:04:39,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:39,312 INFO L225 Difference]: With dead ends: 2722 [2022-12-14 08:04:39,312 INFO L226 Difference]: Without dead ends: 2722 [2022-12-14 08:04:39,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:04:39,312 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1073 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:39,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 78 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 08:04:39,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2022-12-14 08:04:39,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 314. [2022-12-14 08:04:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4948805460750854) internal successors, (1024), 313 states have internal predecessors, (1024), 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 08:04:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1024 transitions. [2022-12-14 08:04:39,330 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1024 transitions. Word has length 6 [2022-12-14 08:04:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:39,330 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1024 transitions. [2022-12-14 08:04:39,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1024 transitions. [2022-12-14 08:04:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:04:39,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:39,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:39,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:39,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:39,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 08:04:39,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:39,933 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2023855181, now seen corresponding path program 1 times [2022-12-14 08:04:39,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:39,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63055980] [2022-12-14 08:04:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:39,935 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 08:04:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:39,936 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:39,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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)] Waiting until timeout for monitored process [2022-12-14 08:04:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 08:04:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:40,107 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:40,107 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 08:04:40,205 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 08:04:40,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:40,554 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 08:04:40,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63055980] [2022-12-14 08:04:40,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63055980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629886405] [2022-12-14 08:04:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:40,555 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:40,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 08:04:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:04:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:40,801 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 08:04:40,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:41,009 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 08:04:41,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629886405] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:41,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812533788] [2022-12-14 08:04:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:41,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:41,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:04:41,010 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:04:41,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 08:04:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:04:41,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:41,187 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:41,187 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 08:04:41,377 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 08:04:41,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:41,470 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 08:04:41,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812533788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:41,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:04:41,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 21 [2022-12-14 08:04:41,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829765744] [2022-12-14 08:04:41,470 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:04:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 08:04:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 08:04:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:04:41,471 INFO L87 Difference]: Start difference. First operand 314 states and 1024 transitions. Second operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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 08:04:44,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:44,310 INFO L93 Difference]: Finished difference Result 815 states and 2597 transitions. [2022-12-14 08:04:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 08:04:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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 08:04:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:44,313 INFO L225 Difference]: With dead ends: 815 [2022-12-14 08:04:44,314 INFO L226 Difference]: Without dead ends: 815 [2022-12-14 08:04:44,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 08:04:44,314 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 680 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:44,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 57 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 08:04:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-12-14 08:04:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 615. [2022-12-14 08:04:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 594 states have (on average 3.5505050505050506) internal successors, (2109), 614 states have internal predecessors, (2109), 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 08:04:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2109 transitions. [2022-12-14 08:04:44,325 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2109 transitions. Word has length 7 [2022-12-14 08:04:44,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:44,325 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2109 transitions. [2022-12-14 08:04:44,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 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 08:04:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2109 transitions. [2022-12-14 08:04:44,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:04:44,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:44,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:44,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:44,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:44,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 08:04:44,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:44,929 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:44,929 INFO L85 PathProgramCache]: Analyzing trace with hash 2024023346, now seen corresponding path program 1 times [2022-12-14 08:04:44,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:44,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209584438] [2022-12-14 08:04:44,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:44,930 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 08:04:44,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:44,931 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:44,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:04:45,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:45,121 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:45,121 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 08:04:45,282 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 08:04:45,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:45,472 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 08:04:45,473 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209584438] [2022-12-14 08:04:45,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209584438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1249785344] [2022-12-14 08:04:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:45,473 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:45,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:45,474 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:45,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 08:04:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:45,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:04:45,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:04:45,699 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 08:04:45,700 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 08:04:45,777 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 08:04:45,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:45,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1249785344] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:45,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:04:45,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 08:04:45,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213823979] [2022-12-14 08:04:45,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:45,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:45,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:45,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:04:45,778 INFO L87 Difference]: Start difference. First operand 615 states and 2109 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:45,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:45,887 INFO L93 Difference]: Finished difference Result 567 states and 1957 transitions. [2022-12-14 08:04:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:04:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:45,890 INFO L225 Difference]: With dead ends: 567 [2022-12-14 08:04:45,890 INFO L226 Difference]: Without dead ends: 567 [2022-12-14 08:04:45,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:04:45,890 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:45,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:04:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-12-14 08:04:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-12-14 08:04:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 552 states have (on average 3.545289855072464) internal successors, (1957), 566 states have internal predecessors, (1957), 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 08:04:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1957 transitions. [2022-12-14 08:04:45,902 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1957 transitions. Word has length 7 [2022-12-14 08:04:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:45,902 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1957 transitions. [2022-12-14 08:04:45,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1957 transitions. [2022-12-14 08:04:45,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:04:45,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:45,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:45,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:46,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 08:04:46,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:46,305 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2024023348, now seen corresponding path program 1 times [2022-12-14 08:04:46,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:46,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93939558] [2022-12-14 08:04:46,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:46,308 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 08:04:46,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:46,310 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:46,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 08:04:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:04:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:46,471 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 08:04:46,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 08:04:46,490 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 08:04:46,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:04:46,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:46,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93939558] [2022-12-14 08:04:46,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93939558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:04:46,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:04:46,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:04:46,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340692697] [2022-12-14 08:04:46,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:46,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:04:46,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:46,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:04:46,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:04:46,491 INFO L87 Difference]: Start difference. First operand 567 states and 1957 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:46,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:46,577 INFO L93 Difference]: Finished difference Result 519 states and 1805 transitions. [2022-12-14 08:04:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:04:46,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:04:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:46,581 INFO L225 Difference]: With dead ends: 519 [2022-12-14 08:04:46,581 INFO L226 Difference]: Without dead ends: 519 [2022-12-14 08:04:46,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 08:04:46,581 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:46,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:04:46,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-12-14 08:04:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-12-14 08:04:46,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 510 states have (on average 3.5392156862745097) internal successors, (1805), 518 states have internal predecessors, (1805), 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 08:04:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1805 transitions. [2022-12-14 08:04:46,589 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1805 transitions. Word has length 7 [2022-12-14 08:04:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:46,589 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1805 transitions. [2022-12-14 08:04:46,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:04:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1805 transitions. [2022-12-14 08:04:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 08:04:46,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:46,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:46,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 08:04:46,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:46,791 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:46,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1679790815, now seen corresponding path program 1 times [2022-12-14 08:04:46,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:46,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822344745] [2022-12-14 08:04:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:46,793 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 08:04:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:46,796 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:46,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:46,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:04:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:46,939 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 08:04:46,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:47,097 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 25 treesize of output 21 [2022-12-14 08:04:47,151 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 08:04:47,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:47,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822344745] [2022-12-14 08:04:47,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822344745] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:47,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1073408853] [2022-12-14 08:04:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:47,152 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:47,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:47,153 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:47,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 08:04:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:47,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:04:47,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:47,427 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 08:04:47,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:47,653 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 08:04:47,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1073408853] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:47,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324357101] [2022-12-14 08:04:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:47,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:47,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:04:47,655 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:04:47,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 08:04:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:04:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:47,824 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:47,824 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 08:04:48,048 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 08:04:48,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:48,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324357101] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:04:48,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-12-14 08:04:48,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4, 4] total 21 [2022-12-14 08:04:48,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760315570] [2022-12-14 08:04:48,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:04:48,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:04:48,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:48,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:04:48,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:04:48,258 INFO L87 Difference]: Start difference. First operand 519 states and 1805 transitions. Second operand has 6 states, 5 states have (on average 1.6) 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 08:04:48,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:48,884 INFO L93 Difference]: Finished difference Result 765 states and 2679 transitions. [2022-12-14 08:04:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:04:48,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) 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 08:04:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:48,888 INFO L225 Difference]: With dead ends: 765 [2022-12-14 08:04:48,888 INFO L226 Difference]: Without dead ends: 765 [2022-12-14 08:04:48,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:04:48,889 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:48,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 7 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:04:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-12-14 08:04:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 637. [2022-12-14 08:04:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 628 states have (on average 3.7436305732484074) internal successors, (2351), 636 states have internal predecessors, (2351), 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 08:04:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2351 transitions. [2022-12-14 08:04:48,899 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2351 transitions. Word has length 8 [2022-12-14 08:04:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:48,899 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 2351 transitions. [2022-12-14 08:04:48,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) 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 08:04:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2351 transitions. [2022-12-14 08:04:48,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:04:48,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:48,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:48,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:49,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:49,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 08:04:49,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:49,503 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:49,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:49,504 INFO L85 PathProgramCache]: Analyzing trace with hash -533905033, now seen corresponding path program 1 times [2022-12-14 08:04:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:49,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846410370] [2022-12-14 08:04:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:49,506 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 08:04:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:49,507 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:49,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:49,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 08:04:49,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:49,691 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:49,692 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 08:04:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:04:49,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:50,265 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 08:04:50,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:04:50,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846410370] [2022-12-14 08:04:50,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846410370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:50,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389044161] [2022-12-14 08:04:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:50,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:04:50,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:04:50,267 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:04:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 08:04:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:50,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:04:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:50,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:50,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [389044161] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:50,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956997036] [2022-12-14 08:04:50,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:50,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:04:50,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:04:50,793 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:04:50,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 08:04:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:04:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:51,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:04:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:04:51,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956997036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:04:51,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:04:51,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 23 [2022-12-14 08:04:51,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52763461] [2022-12-14 08:04:51,386 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:04:51,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 08:04:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:04:51,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 08:04:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:04:51,388 INFO L87 Difference]: Start difference. First operand 637 states and 2351 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 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 08:04:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:04:58,885 INFO L93 Difference]: Finished difference Result 1678 states and 5860 transitions. [2022-12-14 08:04:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 08:04:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 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 08:04:58,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:04:58,891 INFO L225 Difference]: With dead ends: 1678 [2022-12-14 08:04:58,891 INFO L226 Difference]: Without dead ends: 1678 [2022-12-14 08:04:58,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=388, Invalid=1418, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 08:04:58,892 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 972 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:04:58,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 50 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 08:04:58,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-12-14 08:04:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1142. [2022-12-14 08:04:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1133 states have (on average 3.9576345984112975) internal successors, (4484), 1141 states have internal predecessors, (4484), 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 08:04:58,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 4484 transitions. [2022-12-14 08:04:58,930 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 4484 transitions. Word has length 9 [2022-12-14 08:04:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:04:58,930 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 4484 transitions. [2022-12-14 08:04:58,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 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 08:04:58,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 4484 transitions. [2022-12-14 08:04:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:04:58,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:04:58,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:04:58,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:59,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 08:04:59,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-14 08:04:59,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:59,534 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:04:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:04:59,535 INFO L85 PathProgramCache]: Analyzing trace with hash 634178731, now seen corresponding path program 1 times [2022-12-14 08:04:59,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:04:59,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137840646] [2022-12-14 08:04:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:04:59,537 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 08:04:59,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:04:59,538 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:59,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:04:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:04:59,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:04:59,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:04:59,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:04:59,837 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 08:05:00,039 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 08:05:00,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:00,750 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 08:05:00,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:05:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137840646] [2022-12-14 08:05:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137840646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [775122045] [2022-12-14 08:05:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:05:00,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:05:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:05:00,752 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:05:00,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 08:05:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:05:00,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 08:05:00,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:01,012 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:05:01,013 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 08:05:01,292 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 08:05:01,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:01,763 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 08:05:01,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [775122045] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292303005] [2022-12-14 08:05:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:05:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:05:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:05:01,764 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:05:01,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 08:05:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:05:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:05:01,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:01,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:05:01,959 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 08:05:02,098 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 08:05:02,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:02,338 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 08:05:02,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292303005] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:02,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:05:02,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-12-14 08:05:02,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989793806] [2022-12-14 08:05:02,339 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:05:02,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 08:05:02,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:05:02,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 08:05:02,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:05:02,340 INFO L87 Difference]: Start difference. First operand 1142 states and 4484 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 08:05:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:05:08,694 INFO L93 Difference]: Finished difference Result 2385 states and 9495 transitions. [2022-12-14 08:05:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:05:08,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 08:05:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:05:08,703 INFO L225 Difference]: With dead ends: 2385 [2022-12-14 08:05:08,704 INFO L226 Difference]: Without dead ends: 2385 [2022-12-14 08:05:08,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:05:08,705 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 257 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:05:08,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 51 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 08:05:08,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-12-14 08:05:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1701. [2022-12-14 08:05:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1692 states have (on average 4.071513002364066) internal successors, (6889), 1700 states have internal predecessors, (6889), 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 08:05:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 6889 transitions. [2022-12-14 08:05:08,744 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 6889 transitions. Word has length 10 [2022-12-14 08:05:08,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:05:08,744 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 6889 transitions. [2022-12-14 08:05:08,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 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 08:05:08,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 6889 transitions. [2022-12-14 08:05:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:05:08,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:05:08,745 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 08:05:08,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 08:05:08,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:05:09,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-12-14 08:05:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:05:09,348 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:05:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:05:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1116923551, now seen corresponding path program 2 times [2022-12-14 08:05:09,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:05:09,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4523240] [2022-12-14 08:05:09,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:05:09,351 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 08:05:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:05:09,353 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:05:09,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 08:05:09,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:05:09,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:05:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:05:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:09,585 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:05:09,585 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 08:05:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:09,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:11,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:05:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4523240] [2022-12-14 08:05:11,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4523240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:11,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189581024] [2022-12-14 08:05:11,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:05:11,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:05:11,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:05:11,072 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:05:11,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-12-14 08:05:11,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:05:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:05:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:05:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:05:11,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:05:12,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189581024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:12,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550667593] [2022-12-14 08:05:12,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:05:12,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:05:12,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:05:12,274 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:05:12,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 08:05:12,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:05:12,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:05:12,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 08:05:12,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:12,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:13,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550667593] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:13,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:05:13,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 45 [2022-12-14 08:05:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408141381] [2022-12-14 08:05:13,388 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:05:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 08:05:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:05:13,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 08:05:13,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 08:05:13,390 INFO L87 Difference]: Start difference. First operand 1701 states and 6889 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 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 08:05:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:05:33,763 INFO L93 Difference]: Finished difference Result 3496 states and 13178 transitions. [2022-12-14 08:05:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 08:05:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 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 08:05:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:05:33,777 INFO L225 Difference]: With dead ends: 3496 [2022-12-14 08:05:33,777 INFO L226 Difference]: Without dead ends: 3496 [2022-12-14 08:05:33,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1435, Invalid=4417, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 08:05:33,778 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1400 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:05:33,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 376 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-12-14 08:05:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2022-12-14 08:05:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 1978. [2022-12-14 08:05:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1969 states have (on average 3.9969527679024885) internal successors, (7870), 1977 states have internal predecessors, (7870), 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 08:05:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 7870 transitions. [2022-12-14 08:05:33,837 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 7870 transitions. Word has length 11 [2022-12-14 08:05:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:05:33,837 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 7870 transitions. [2022-12-14 08:05:33,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 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 08:05:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 7870 transitions. [2022-12-14 08:05:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:05:33,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:05:33,838 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:05:33,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 08:05:34,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-12-14 08:05:34,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-12-14 08:05:34,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:05:34,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:05:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:05:34,441 INFO L85 PathProgramCache]: Analyzing trace with hash -439456757, now seen corresponding path program 1 times [2022-12-14 08:05:34,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:05:34,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059169551] [2022-12-14 08:05:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:05:34,451 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 08:05:34,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:05:34,452 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:05:34,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (38)] Waiting until timeout for monitored process [2022-12-14 08:05:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:05:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:05:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:34,692 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:05:34,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:05:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:34,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:34,981 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 8 treesize of output 6 [2022-12-14 08:05:35,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:05:35,008 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:05:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:35,508 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:05:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059169551] [2022-12-14 08:05:35,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059169551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:35,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [728865698] [2022-12-14 08:05:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:05:35,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:05:35,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:05:35,509 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:05:35,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-12-14 08:05:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:05:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:05:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:35,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:36,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:36,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [728865698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:36,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942258422] [2022-12-14 08:05:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:05:36,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:05:36,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:05:36,628 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:05:36,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 08:05:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:05:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:05:36,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:36,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:37,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942258422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:37,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:05:37,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 23 [2022-12-14 08:05:37,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154016875] [2022-12-14 08:05:37,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:05:37,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 08:05:37,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:05:37,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 08:05:37,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:05:37,112 INFO L87 Difference]: Start difference. First operand 1978 states and 7870 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2022-12-14 08:05:41,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:05:41,026 INFO L93 Difference]: Finished difference Result 1988 states and 7830 transitions. [2022-12-14 08:05:41,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:05:41,028 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) Word has length 12 [2022-12-14 08:05:41,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:05:41,033 INFO L225 Difference]: With dead ends: 1988 [2022-12-14 08:05:41,033 INFO L226 Difference]: Without dead ends: 1988 [2022-12-14 08:05:41,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2022-12-14 08:05:41,034 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 225 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:05:41,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 116 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 08:05:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2022-12-14 08:05:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1968. [2022-12-14 08:05:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1959 states have (on average 3.9816232771822357) internal successors, (7800), 1967 states have internal predecessors, (7800), 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 08:05:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 7800 transitions. [2022-12-14 08:05:41,069 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 7800 transitions. Word has length 12 [2022-12-14 08:05:41,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:05:41,069 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 7800 transitions. [2022-12-14 08:05:41,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2022-12-14 08:05:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 7800 transitions. [2022-12-14 08:05:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:05:41,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:05:41,070 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:05:41,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (38)] Forceful destruction successful, exit code 0 [2022-12-14 08:05:41,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2022-12-14 08:05:41,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 08:05:41,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:05:41,671 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:05:41,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:05:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash 866727953, now seen corresponding path program 2 times [2022-12-14 08:05:41,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:05:41,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545581749] [2022-12-14 08:05:41,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:05:41,674 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 08:05:41,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:05:41,676 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:05:41,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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)] Waiting until timeout for monitored process [2022-12-14 08:05:41,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:05:41,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:05:41,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:05:41,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:41,971 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:05:41,972 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 08:05:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:42,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:44,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:05:44,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545581749] [2022-12-14 08:05:44,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545581749] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:44,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753159696] [2022-12-14 08:05:44,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:05:44,564 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:05:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:05:44,564 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:05:44,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-12-14 08:05:44,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:05:44,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:05:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:05:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:44,937 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:05:44,937 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 08:05:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:45,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:46,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753159696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641182530] [2022-12-14 08:05:46,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:05:46,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:05:46,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:05:46,643 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:05:46,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 08:05:46,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:05:46,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:05:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:05:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:05:46,871 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:05:46,871 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 08:05:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:47,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:05:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:05:49,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641182530] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:05:49,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:05:49,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 18 [2022-12-14 08:05:49,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445549799] [2022-12-14 08:05:49,248 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:05:49,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 08:05:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:05:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 08:05:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:05:49,249 INFO L87 Difference]: Start difference. First operand 1968 states and 7800 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 08:06:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:06:10,851 INFO L93 Difference]: Finished difference Result 3360 states and 13768 transitions. [2022-12-14 08:06:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 08:06:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 08:06:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:06:10,867 INFO L225 Difference]: With dead ends: 3360 [2022-12-14 08:06:10,867 INFO L226 Difference]: Without dead ends: 3360 [2022-12-14 08:06:10,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 08:06:10,867 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 710 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:06:10,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 106 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-12-14 08:06:10,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2022-12-14 08:06:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2580. [2022-12-14 08:06:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 2571 states have (on average 4.239595488136912) internal successors, (10900), 2579 states have internal predecessors, (10900), 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 08:06:10,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 10900 transitions. [2022-12-14 08:06:10,924 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 10900 transitions. Word has length 12 [2022-12-14 08:06:10,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:06:10,924 INFO L495 AbstractCegarLoop]: Abstraction has 2580 states and 10900 transitions. [2022-12-14 08:06:10,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 08:06:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 10900 transitions. [2022-12-14 08:06:10,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:06:10,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:06:10,925 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 08:06:10,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-12-14 08:06:11,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 08:06:11,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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)] Ended with exit code 0 [2022-12-14 08:06:11,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:06:11,527 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:06:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:06:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1380381786, now seen corresponding path program 3 times [2022-12-14 08:06:11,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:06:11,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249530768] [2022-12-14 08:06:11,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:06:11,530 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 08:06:11,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:06:11,533 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:06:11,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:06:11,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:06:11,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:06:11,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:06:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:11,849 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:06:11,849 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 08:06:12,233 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 08:06:12,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:06:14,910 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 08:06:14,911 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:06:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249530768] [2022-12-14 08:06:14,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249530768] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:06:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313636204] [2022-12-14 08:06:14,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:06:14,911 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:06:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:06:14,912 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:06:14,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 08:06:15,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:06:15,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:06:15,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:06:15,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:15,647 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:06:15,647 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 08:06:15,833 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 08:06:15,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:06:18,799 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 08:06:18,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313636204] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:06:18,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64803681] [2022-12-14 08:06:18,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:06:18,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:06:18,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:06:18,801 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:06:18,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 08:06:20,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:06:20,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:06:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:06:20,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:20,159 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:06:20,160 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 08:06:20,291 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 08:06:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:06:20,615 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 08:06:20,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64803681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:06:20,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:06:20,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 08:06:20,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775765432] [2022-12-14 08:06:20,615 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:06:20,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 08:06:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:06:20,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 08:06:20,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:06:20,616 INFO L87 Difference]: Start difference. First operand 2580 states and 10900 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 08:06:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:06:41,709 INFO L93 Difference]: Finished difference Result 15206 states and 63466 transitions. [2022-12-14 08:06:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:06:41,711 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 08:06:41,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:06:41,806 INFO L225 Difference]: With dead ends: 15206 [2022-12-14 08:06:41,806 INFO L226 Difference]: Without dead ends: 15206 [2022-12-14 08:06:41,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 08:06:41,808 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4106 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4106 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:06:41,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4106 Valid, 372 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2807 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-12-14 08:06:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2022-12-14 08:06:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 2592. [2022-12-14 08:06:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2583 states have (on average 4.229190863337204) internal successors, (10924), 2591 states have internal predecessors, (10924), 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 08:06:42,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 10924 transitions. [2022-12-14 08:06:42,007 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 10924 transitions. Word has length 12 [2022-12-14 08:06:42,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:06:42,007 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 10924 transitions. [2022-12-14 08:06:42,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 08:06:42,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 10924 transitions. [2022-12-14 08:06:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 08:06:42,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:06:42,009 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:06:42,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-12-14 08:06:42,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 08:06:42,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 08:06:42,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:06:42,612 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:06:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:06:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1754350144, now seen corresponding path program 2 times [2022-12-14 08:06:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:06:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548194059] [2022-12-14 08:06:42,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:06:42,615 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 08:06:42,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:06:42,617 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:06:42,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (47)] Waiting until timeout for monitored process [2022-12-14 08:06:42,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 08:06:42,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:06:42,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:06:42,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:42,932 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:06:42,932 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 17 treesize of output 44 [2022-12-14 08:06:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:06:43,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:06:43,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:06:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548194059] [2022-12-14 08:06:43,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548194059] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:06:43,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:06:43,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:06:43,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145286268] [2022-12-14 08:06:43,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:06:43,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:06:43,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:06:43,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:06:43,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:06:43,116 INFO L87 Difference]: Start difference. First operand 2592 states and 10924 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:06:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:06:43,401 INFO L93 Difference]: Finished difference Result 2738 states and 11106 transitions. [2022-12-14 08:06:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:06:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 08:06:43,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:06:43,408 INFO L225 Difference]: With dead ends: 2738 [2022-12-14 08:06:43,408 INFO L226 Difference]: Without dead ends: 2738 [2022-12-14 08:06:43,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:06:43,409 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:06:43,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:06:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-12-14 08:06:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2652. [2022-12-14 08:06:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2643 states have (on average 4.104426787741203) internal successors, (10848), 2651 states have internal predecessors, (10848), 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 08:06:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 10848 transitions. [2022-12-14 08:06:43,467 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 10848 transitions. Word has length 13 [2022-12-14 08:06:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:06:43,468 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 10848 transitions. [2022-12-14 08:06:43,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:06:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 10848 transitions. [2022-12-14 08:06:43,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:06:43,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:06:43,470 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:06:43,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (47)] Ended with exit code 0 [2022-12-14 08:06:43,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:06:43,671 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:06:43,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:06:43,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1539066539, now seen corresponding path program 3 times [2022-12-14 08:06:43,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:06:43,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745749861] [2022-12-14 08:06:43,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:06:43,673 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 08:06:43,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:06:43,675 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:06:43,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 08:06:43,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:06:43,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:06:43,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:06:43,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:44,001 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:06:44,002 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 08:06:44,424 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 7 treesize of output 5 [2022-12-14 08:06:44,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-14 08:06:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:06:44,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:06:45,066 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 8 treesize of output 6 [2022-12-14 08:06:45,135 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:06:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:06:46,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:06:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745749861] [2022-12-14 08:06:46,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745749861] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:06:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033319205] [2022-12-14 08:06:46,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:06:46,885 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:06:46,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:06:46,886 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:06:46,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 08:06:47,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:06:47,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:06:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:06:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:47,280 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:06:47,280 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 08:06:47,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-14 08:06:47,789 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 7 treesize of output 5 [2022-12-14 08:06:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:06:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:06:48,333 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 8 treesize of output 6 [2022-12-14 08:06:48,375 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:06:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:06:51,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033319205] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:06:51,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825741870] [2022-12-14 08:06:51,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:06:51,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:06:51,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:06:51,325 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:06:51,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 08:06:51,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:06:51,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:06:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:06:51,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:06:51,624 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:06:51,625 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 08:06:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:06:52,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:06:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:06:54,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825741870] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:06:54,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:06:54,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 5, 5, 5] total 19 [2022-12-14 08:06:54,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723865879] [2022-12-14 08:06:54,957 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:06:54,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:06:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:06:54,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:06:54,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:06:54,958 INFO L87 Difference]: Start difference. First operand 2652 states and 10848 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 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) [2022-12-14 08:06:59,135 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 08:07:01,480 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 08:07:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:07:02,285 INFO L93 Difference]: Finished difference Result 2892 states and 11654 transitions. [2022-12-14 08:07:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:07:02,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 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) Word has length 14 [2022-12-14 08:07:02,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:07:02,292 INFO L225 Difference]: With dead ends: 2892 [2022-12-14 08:07:02,292 INFO L226 Difference]: Without dead ends: 2892 [2022-12-14 08:07:02,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2022-12-14 08:07:02,293 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 290 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:07:02,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 34 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 308 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-12-14 08:07:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-12-14 08:07:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 1772. [2022-12-14 08:07:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1767 states have (on average 3.912846632710809) internal successors, (6914), 1771 states have internal predecessors, (6914), 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 08:07:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6914 transitions. [2022-12-14 08:07:02,324 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6914 transitions. Word has length 14 [2022-12-14 08:07:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:07:02,325 INFO L495 AbstractCegarLoop]: Abstraction has 1772 states and 6914 transitions. [2022-12-14 08:07:02,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 20 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) [2022-12-14 08:07:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6914 transitions. [2022-12-14 08:07:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:07:02,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:07:02,326 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:07:02,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 08:07:02,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 08:07:02,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 08:07:02,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:07:02,928 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:07:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:07:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash 680243521, now seen corresponding path program 2 times [2022-12-14 08:07:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:07:02,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716893339] [2022-12-14 08:07:02,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:07:02,931 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 08:07:02,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:07:02,934 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:07:02,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (51)] Waiting until timeout for monitored process [2022-12-14 08:07:03,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:07:03,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:07:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:07:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:07:03,284 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:07:03,284 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 08:07:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:07:03,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:07:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:07:05,459 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:07:05,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716893339] [2022-12-14 08:07:05,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716893339] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:07:05,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1035621702] [2022-12-14 08:07:05,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:07:05,460 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:07:05,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:07:05,461 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:07:05,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 08:07:05,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:07:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:07:05,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:07:05,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:07:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:07:06,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:07:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:07:07,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1035621702] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:07:07,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114573385] [2022-12-14 08:07:07,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:07:07,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:07:07,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:07:07,599 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:07:07,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 08:07:07,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:07:07,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:07:07,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:07:07,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:07:07,867 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:07:07,868 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 08:07:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:07:08,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:07:08,734 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 8 treesize of output 6 [2022-12-14 08:07:08,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:07:08,759 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:07:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:07:10,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114573385] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:07:10,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:07:10,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 9, 10, 10] total 56 [2022-12-14 08:07:10,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129838170] [2022-12-14 08:07:10,908 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:07:10,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 08:07:10,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:07:10,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 08:07:10,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2849, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 08:07:10,912 INFO L87 Difference]: Start difference. First operand 1772 states and 6914 transitions. Second operand has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 states have internal predecessors, (80), 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 08:07:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:07:57,936 INFO L93 Difference]: Finished difference Result 3367 states and 12019 transitions. [2022-12-14 08:07:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 08:07:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 states have internal predecessors, (80), 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 14 [2022-12-14 08:07:57,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:07:57,944 INFO L225 Difference]: With dead ends: 3367 [2022-12-14 08:07:57,944 INFO L226 Difference]: Without dead ends: 3367 [2022-12-14 08:07:57,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=1332, Invalid=7224, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 08:07:57,946 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2119 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 5975 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 6037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 5975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:07:57,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2119 Valid, 469 Invalid, 6037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 5975 Invalid, 0 Unknown, 0 Unchecked, 26.4s Time] [2022-12-14 08:07:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2022-12-14 08:07:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 1863. [2022-12-14 08:07:57,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1858 states have (on average 3.84983853606028) internal successors, (7153), 1862 states have internal predecessors, (7153), 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 08:07:57,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 7153 transitions. [2022-12-14 08:07:57,979 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 7153 transitions. Word has length 14 [2022-12-14 08:07:57,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:07:57,979 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 7153 transitions. [2022-12-14 08:07:57,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 states have internal predecessors, (80), 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 08:07:57,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 7153 transitions. [2022-12-14 08:07:57,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:07:57,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:07:57,981 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2022-12-14 08:07:57,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 08:07:58,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (51)] Ended with exit code 0 [2022-12-14 08:07:58,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 08:07:58,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:07:58,583 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:07:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:07:58,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2051549032, now seen corresponding path program 3 times [2022-12-14 08:07:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:07:58,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586716845] [2022-12-14 08:07:58,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:07:58,586 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 08:07:58,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:07:58,589 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:07:58,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (54)] Waiting until timeout for monitored process [2022-12-14 08:07:59,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:07:59,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:07:59,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:07:59,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:07:59,166 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:07:59,166 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 08:07:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:07:59,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:07:59,611 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 8 treesize of output 6 [2022-12-14 08:07:59,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:07:59,631 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:08:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:01,276 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:08:01,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586716845] [2022-12-14 08:08:01,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586716845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:01,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [11757817] [2022-12-14 08:08:01,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:08:01,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:08:01,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:08:01,278 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:08:01,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 08:08:02,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:08:02,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:08:02,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:08:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:02,306 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:08:02,306 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 08:08:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:02,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:02,481 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 8 treesize of output 6 [2022-12-14 08:08:02,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:08:02,505 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:08:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [11757817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:03,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502313583] [2022-12-14 08:08:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:08:03,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:03,364 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:03,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 08:08:03,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:08:03,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:08:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:08:03,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:03,762 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:08:03,762 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 17 treesize of output 44 [2022-12-14 08:08:04,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-12-14 08:08:04,161 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 7 treesize of output 5 [2022-12-14 08:08:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:04,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:04,395 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 8 treesize of output 6 [2022-12-14 08:08:04,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:08:04,432 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:08:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:08:08,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502313583] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:08,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:08:08,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 42 [2022-12-14 08:08:08,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540591400] [2022-12-14 08:08:08,374 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:08:08,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 08:08:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:08:08,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 08:08:08,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 08:08:08,376 INFO L87 Difference]: Start difference. First operand 1863 states and 7153 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 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 08:09:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:09:03,335 INFO L93 Difference]: Finished difference Result 6001 states and 22451 transitions. [2022-12-14 08:09:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 08:09:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 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 14 [2022-12-14 08:09:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:09:03,351 INFO L225 Difference]: With dead ends: 6001 [2022-12-14 08:09:03,351 INFO L226 Difference]: Without dead ends: 6001 [2022-12-14 08:09:03,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=1066, Invalid=4786, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 08:09:03,354 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2713 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 5055 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2713 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 5107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 5055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:09:03,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2713 Valid, 735 Invalid, 5107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 5055 Invalid, 0 Unknown, 0 Unchecked, 30.8s Time] [2022-12-14 08:09:03,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2022-12-14 08:09:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 2967. [2022-12-14 08:09:03,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2962 states have (on average 4.1333558406482105) internal successors, (12243), 2966 states have internal predecessors, (12243), 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 08:09:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 12243 transitions. [2022-12-14 08:09:03,417 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 12243 transitions. Word has length 14 [2022-12-14 08:09:03,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:09:03,417 INFO L495 AbstractCegarLoop]: Abstraction has 2967 states and 12243 transitions. [2022-12-14 08:09:03,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 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 08:09:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 12243 transitions. [2022-12-14 08:09:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:09:03,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:09:03,419 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-14 08:09:03,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (54)] Ended with exit code 0 [2022-12-14 08:09:03,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 08:09:03,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 08:09:04,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:09:04,021 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:09:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:09:04,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1287168435, now seen corresponding path program 4 times [2022-12-14 08:09:04,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:09:04,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169873104] [2022-12-14 08:09:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:09:04,024 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 08:09:04,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:09:04,026 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:09:04,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (57)] Waiting until timeout for monitored process [2022-12-14 08:09:04,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:09:04,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:09:04,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:09:04,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:04,276 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:09:04,276 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 08:09:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:09:04,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:09:06,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:09:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169873104] [2022-12-14 08:09:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169873104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:06,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526442746] [2022-12-14 08:09:06,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:09:06,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:09:06,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:09:06,937 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:09:06,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 08:09:07,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:09:07,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:09:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:09:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:09:08,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:09:09,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526442746] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616589189] [2022-12-14 08:09:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:09:09,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:09:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:09:09,995 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:09:09,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 08:09:10,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:09:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:09:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:09:10,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:09:10,234 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:09:10,235 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:09:10,996 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 7 treesize of output 5 [2022-12-14 08:09:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:09:11,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:09:11,579 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 8 treesize of output 6 [2022-12-14 08:09:11,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:09:11,609 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:09:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 08:09:14,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616589189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:09:14,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:09:14,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 8, 8] total 64 [2022-12-14 08:09:14,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275037398] [2022-12-14 08:09:14,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:09:14,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-14 08:09:14,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:09:14,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-14 08:09:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=3718, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 08:09:14,583 INFO L87 Difference]: Start difference. First operand 2967 states and 12243 transitions. Second operand has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 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 08:10:00,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:00,404 INFO L93 Difference]: Finished difference Result 5641 states and 21135 transitions. [2022-12-14 08:10:00,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 08:10:00,406 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 08:10:00,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:00,417 INFO L225 Difference]: With dead ends: 5641 [2022-12-14 08:10:00,417 INFO L226 Difference]: Without dead ends: 5641 [2022-12-14 08:10:00,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=2613, Invalid=12391, Unknown=2, NotChecked=0, Total=15006 [2022-12-14 08:10:00,419 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 4888 mSDsluCounter, 1655 mSDsCounter, 0 mSdLazyCounter, 10184 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4888 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 10270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 10184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:00,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4888 Valid, 1724 Invalid, 10270 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [86 Valid, 10184 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2022-12-14 08:10:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2022-12-14 08:10:00,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 3484. [2022-12-14 08:10:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3479 states have (on average 4.021845357861454) internal successors, (13992), 3483 states have internal predecessors, (13992), 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 08:10:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 13992 transitions. [2022-12-14 08:10:00,510 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 13992 transitions. Word has length 15 [2022-12-14 08:10:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:00,511 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 13992 transitions. [2022-12-14 08:10:00,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 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 08:10:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 13992 transitions. [2022-12-14 08:10:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:10:00,512 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:00,513 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:10:00,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-14 08:10:00,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-12-14 08:10:00,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (57)] Ended with exit code 0 [2022-12-14 08:10:01,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:10:01,115 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:10:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1833677378, now seen corresponding path program 3 times [2022-12-14 08:10:01,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:10:01,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432533030] [2022-12-14 08:10:01,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:10:01,118 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 08:10:01,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:10:01,119 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:10:01,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (60)] Waiting until timeout for monitored process [2022-12-14 08:10:01,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:10:01,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:10:01,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:10:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:01,614 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:10:01,614 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 08:10:02,147 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 7 treesize of output 5 [2022-12-14 08:10:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:10:02,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 90 [2022-12-14 08:10:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:10:02,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:10:02,507 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 8 treesize of output 6 [2022-12-14 08:10:02,586 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:10:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:10:05,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:10:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432533030] [2022-12-14 08:10:05,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432533030] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:10:05,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [940259562] [2022-12-14 08:10:05,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:10:05,444 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:10:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:10:05,444 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:10:05,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 08:10:06,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:10:06,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:10:06,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:10:06,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:06,558 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:10:06,558 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 08:10:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:10:07,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:10:07,482 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 8 treesize of output 6 [2022-12-14 08:10:07,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:10:07,509 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:10:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:10:10,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [940259562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:10:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482200374] [2022-12-14 08:10:10,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:10:10,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:10:10,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:10:10,271 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:10:10,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 08:10:10,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 08:10:10,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:10:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:10:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:10,943 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:10:10,943 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 08:10:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:10:11,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:10:11,548 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 8 treesize of output 6 [2022-12-14 08:10:11,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 08:10:11,580 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 08:10:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:10:16,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482200374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:10:16,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:10:16,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 56 [2022-12-14 08:10:16,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044173717] [2022-12-14 08:10:16,381 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:10:16,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 08:10:16,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:10:16,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 08:10:16,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 08:10:16,383 INFO L87 Difference]: Start difference. First operand 3484 states and 13992 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 56 states have internal predecessors, (77), 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 08:10:58,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:10:58,947 INFO L93 Difference]: Finished difference Result 8447 states and 31830 transitions. [2022-12-14 08:10:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 08:10:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 56 states have internal predecessors, (77), 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 16 [2022-12-14 08:10:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:10:58,967 INFO L225 Difference]: With dead ends: 8447 [2022-12-14 08:10:58,967 INFO L226 Difference]: Without dead ends: 8447 [2022-12-14 08:10:58,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=1537, Invalid=8363, Unknown=0, NotChecked=0, Total=9900 [2022-12-14 08:10:58,968 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3368 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 4743 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3368 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 4818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 4743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:10:58,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3368 Valid, 689 Invalid, 4818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4743 Invalid, 0 Unknown, 0 Unchecked, 18.3s Time] [2022-12-14 08:10:58,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2022-12-14 08:10:59,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 4661. [2022-12-14 08:10:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4656 states have (on average 4.198238831615121) internal successors, (19547), 4660 states have internal predecessors, (19547), 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 08:10:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 19547 transitions. [2022-12-14 08:10:59,075 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 19547 transitions. Word has length 16 [2022-12-14 08:10:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:10:59,075 INFO L495 AbstractCegarLoop]: Abstraction has 4661 states and 19547 transitions. [2022-12-14 08:10:59,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 56 states have internal predecessors, (77), 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 08:10:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 19547 transitions. [2022-12-14 08:10:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:10:59,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:10:59,077 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:10:59,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-12-14 08:10:59,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 08:10:59,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (60)] Ended with exit code 0 [2022-12-14 08:10:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:10:59,680 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:10:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:10:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1964023479, now seen corresponding path program 4 times [2022-12-14 08:10:59,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:10:59,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600343653] [2022-12-14 08:10:59,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:10:59,683 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 08:10:59,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:10:59,684 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:10:59,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (63)] Waiting until timeout for monitored process [2022-12-14 08:10:59,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:10:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:10:59,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 08:10:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:10:59,978 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:10:59,979 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 08:11:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:11:00,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:11:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:11:03,368 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:11:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600343653] [2022-12-14 08:11:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600343653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:11:03,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772024755] [2022-12-14 08:11:03,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:11:03,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:11:03,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:11:03,369 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:11:03,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-12-14 08:11:03,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:11:03,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:11:03,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:11:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:11:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:11:04,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:11:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:11:07,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772024755] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:11:07,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692756201] [2022-12-14 08:11:07,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:11:07,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:11:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:11:07,804 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:11:07,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 08:11:07,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:11:07,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:11:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:11:07,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:11:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:11:09,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:11:10,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:11:10,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692756201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:11:10,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:11:10,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 63 [2022-12-14 08:11:10,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226328839] [2022-12-14 08:11:10,842 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:11:10,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 08:11:10,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:11:10,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 08:11:10,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3728, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 08:11:10,843 INFO L87 Difference]: Start difference. First operand 4661 states and 19547 transitions. Second operand has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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 08:12:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:12:48,263 INFO L93 Difference]: Finished difference Result 11490 states and 43996 transitions. [2022-12-14 08:12:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-14 08:12:48,265 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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 17 [2022-12-14 08:12:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:12:48,289 INFO L225 Difference]: With dead ends: 11490 [2022-12-14 08:12:48,289 INFO L226 Difference]: Without dead ends: 11490 [2022-12-14 08:12:48,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=3086, Invalid=15820, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 08:12:48,290 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 9205 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 13202 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9205 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 13423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 13202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:12:48,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9205 Valid, 1034 Invalid, 13423 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [221 Valid, 13202 Invalid, 0 Unknown, 0 Unchecked, 45.3s Time] [2022-12-14 08:12:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2022-12-14 08:12:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 5294. [2022-12-14 08:12:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5289 states have (on average 4.310077519379845) internal successors, (22796), 5293 states have internal predecessors, (22796), 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 08:12:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 22796 transitions. [2022-12-14 08:12:48,406 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 22796 transitions. Word has length 17 [2022-12-14 08:12:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:12:48,406 INFO L495 AbstractCegarLoop]: Abstraction has 5294 states and 22796 transitions. [2022-12-14 08:12:48,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 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 08:12:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 22796 transitions. [2022-12-14 08:12:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:12:48,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:12:48,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:12:48,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-12-14 08:12:48,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 08:12:48,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (63)] Ended with exit code 0 [2022-12-14 08:12:49,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:12:49,013 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 08:12:49,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:12:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1455629767, now seen corresponding path program 1 times [2022-12-14 08:12:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:12:49,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332336000] [2022-12-14 08:12:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:12:49,015 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 08:12:49,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:12:49,017 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 08:12:49,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/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 (66)] Waiting until timeout for monitored process [2022-12-14 08:12:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:12:49,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 08:12:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:12:49,274 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 18 treesize of output 16 [2022-12-14 08:12:49,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:12:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 08:12:50,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 08:12:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:12:50,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:50,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:12:50,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 146 [2022-12-14 08:12:50,948 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 146 treesize of output 138 [2022-12-14 08:12:50,954 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 138 treesize of output 130 [2022-12-14 08:12:51,152 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 08:12:51,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:12:52,892 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse14 (bvmul (_ bv4 32) c_~M~0))) (let ((.cse7 (bvadd .cse14 c_~A~0.offset)) (.cse15 (bvadd .cse14 (_ bv4 32) c_~A~0.offset))) (let ((.cse0 (not (= (_ bv0 1) (bvadd (select |c_#valid| c_~A~0.base) (_ bv1 1))))) (.cse1 (not (bvule .cse15 (select |c_#length| c_~A~0.base)))) (.cse2 (not (bvule .cse7 .cse15))) (.cse9 (= c_~min2~0 c_~min1~0)) (.cse4 (bvadd .cse14 (_ bv3 32) c_~A~0.offset)) (.cse5 (bvadd .cse14 (_ bv2 32) c_~A~0.offset)) (.cse6 (bvadd .cse14 c_~A~0.offset (_ bv1 32)))) (and (or .cse0 .cse1 .cse2 (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8)))) (bvsgt c_~min3~0 (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse3 .cse4) (select .cse3 .cse5)) (select .cse3 .cse6)) (select .cse3 .cse7))))) (let ((.cse8 (bvsgt c_~min2~0 c_~min3~0))) (and (or .cse8 .cse9) (or (not .cse8) (= c_~min3~0 c_~min1~0))))) (or .cse0 .cse1 .cse2 (and (or (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse10 (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse11 .cse4) (select .cse11 .cse5)) (select .cse11 .cse6)) (select .cse11 .cse7))))) (or (bvsgt c_~min2~0 .cse10) (not (bvsgt c_~min3~0 .cse10))))) .cse9) (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse12 (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse13 .cse4) (select .cse13 .cse5)) (select .cse13 .cse6)) (select .cse13 .cse7))))) (or (not (bvsgt c_~min2~0 .cse12)) (= .cse12 c_~min1~0) (not (bvsgt c_~min3~0 .cse12))))))))))) is different from false [2022-12-14 08:12:54,343 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 710 treesize of output 702 [2022-12-14 08:12:54,351 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 702 treesize of output 694 [2022-12-14 08:12:58,048 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-12-14 08:12:58,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 20468 treesize of output 18238 [2022-12-14 08:12:58,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 18181 treesize of output 17749 [2022-12-14 08:12:58,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:58,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 17749 treesize of output 16885 [2022-12-14 08:12:58,690 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-12-14 08:12:58,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 16885 treesize of output 16163 [2022-12-14 08:12:58,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:58,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 16106 treesize of output 15674 [2022-12-14 08:12:59,001 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 15674 treesize of output 14810 [2022-12-14 08:12:59,084 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 14810 treesize of output 14702 [2022-12-14 08:12:59,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 14702 treesize of output 14648 [2022-12-14 08:12:59,451 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-12-14 08:12:59,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 14648 treesize of output 13733 [2022-12-14 08:12:59,579 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 13716 treesize of output 12852 [2022-12-14 08:12:59,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 12852 treesize of output 12420 [2022-12-14 08:12:59,735 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 12420 treesize of output 9828 [2022-12-14 08:12:59,812 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9828 treesize of output 8532 [2022-12-14 08:12:59,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8532 treesize of output 8316 [2022-12-14 08:12:59,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:12:59,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 8316 treesize of output 8208 [2022-12-14 08:18:17,074 WARN L233 SmtUtils]: Spent 31.04s on a formula simplification. DAG size of input: 724 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:18:17,444 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 08:18:17,445 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:18:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332336000] [2022-12-14 08:18:17,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332336000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:18:17,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928555500] [2022-12-14 08:18:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:18:17,445 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:18:17,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:18:17,446 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:18:17,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_448cf4e2-203f-4c21-b27c-13e8926aa05a/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-12-14 08:18:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:18:17,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 08:18:17,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:18:18,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 08:18:18,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:18:19,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:19,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 08:18:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:19,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 08:18:20,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:20,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:20,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:20,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:20,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:20,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:20,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:20,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:20,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:20,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:20,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 146 [2022-12-14 08:18:20,944 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 146 treesize of output 138 [2022-12-14 08:18:20,950 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 138 treesize of output 130 [2022-12-14 08:18:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:18:21,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:18:26,377 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 710 treesize of output 702 [2022-12-14 08:18:26,384 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 702 treesize of output 694 [2022-12-14 08:18:31,620 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse7 (bvsgt c_~min2~0 c_~min3~0))) (let ((.cse20 (not (bvule |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32))))) (.cse9 (not .cse7)) (.cse1 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32))) (.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32))) (.cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32)))) (and (or (let ((.cse8 (= c_~min2~0 c_~min1~0))) (and (or (forall ((v_ArrVal_2470 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_15 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_14 (Array (_ BitVec 32) (_ BitVec 8))) (~M~0 (_ BitVec 32))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2470))) (or (not (bvslt ~M~0 c_~N~0)) (bvslt (_ bv0 32) ~M~0) (bvsgt c_~min1~0 (let ((.cse0 (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (not (bvsge ~M~0 (_ bv0 32))) (bvsgt c_~min3~0 (let ((.cse5 (select (store (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_prenex_15) |c_ULTIMATE.start_main_~#t3~0#1.base| v_prenex_14) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse6 (bvmul (_ bv4 32) ~M~0))) (concat (concat (concat (select .cse5 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse6)) (select .cse5 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse6))) (select .cse5 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32) .cse6))) (select .cse5 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse6)))))))) (and (or .cse7 .cse8) (or .cse9 (= c_~min3~0 c_~min1~0)))) (forall ((~M~0 (_ BitVec 32))) (or (not (bvslt ~M~0 c_~N~0)) (bvslt (_ bv0 32) ~M~0) (not (bvsge ~M~0 (_ bv0 32))) (forall ((v_ArrVal_2470 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2470))) (or (bvsgt c_~min1~0 (let ((.cse10 (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse10 .cse1) (select .cse10 .cse2)) (select .cse10 .cse3)) (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_2472 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2471 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse12 (let ((.cse13 (select (store (store .cse11 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2471) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2472) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse14 (bvmul (_ bv4 32) ~M~0))) (concat (concat (concat (select .cse13 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse14)) (select .cse13 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse14))) (select .cse13 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32) .cse14))) (select .cse13 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse14)))))) (or (not (bvsgt c_~min2~0 .cse12)) (not (bvsgt c_~min3~0 .cse12)) (= .cse12 c_~min1~0))))))))) (or .cse8 (forall ((v_ArrVal_2470 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_12 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_13 (Array (_ BitVec 32) (_ BitVec 8))) (~M~0 (_ BitVec 32))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2470))) (let ((.cse15 (let ((.cse18 (select (store (store .cse17 |c_ULTIMATE.start_main_~#t2~0#1.base| v_prenex_13) |c_ULTIMATE.start_main_~#t3~0#1.base| v_prenex_12) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse19 (bvmul (_ bv4 32) ~M~0))) (concat (concat (concat (select .cse18 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse19)) (select .cse18 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse19))) (select .cse18 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32) .cse19))) (select .cse18 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse19)))))) (or (not (bvslt ~M~0 c_~N~0)) (bvslt (_ bv0 32) ~M~0) (not (bvsgt c_~min3~0 .cse15)) (bvsgt c_~min1~0 (let ((.cse16 (select .cse17 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse16 .cse1) (select .cse16 .cse2)) (select .cse16 .cse3)) (select .cse16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (bvsgt c_~min2~0 .cse15) (not (bvsge ~M~0 (_ bv0 32)))))))))) .cse20) (or .cse20 (and (forall ((~M~0 (_ BitVec 32))) (or (not (bvslt ~M~0 c_~N~0)) (bvslt (_ bv0 32) ~M~0) (forall ((v_ArrVal_2470 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse25 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2470))) (let ((.cse22 (let ((.cse26 (select .cse25 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse26 .cse1) (select .cse26 .cse2)) (select .cse26 .cse3)) (select .cse26 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (or (forall ((v_ArrVal_2472 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2471 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse21 (let ((.cse23 (select (store (store .cse25 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2471) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2472) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse24 (bvmul (_ bv4 32) ~M~0))) (concat (concat (concat (select .cse23 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse24)) (select .cse23 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse24))) (select .cse23 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32) .cse24))) (select .cse23 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse24)))))) (or (not (bvsgt c_~min2~0 .cse21)) (not (bvsgt c_~min3~0 .cse21)) (= .cse22 .cse21)))) (not (bvsgt c_~min1~0 .cse22)))))) (not (bvsge ~M~0 (_ bv0 32))))) (or .cse9 (forall ((v_ArrVal_2470 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_15 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_14 (Array (_ BitVec 32) (_ BitVec 8))) (~M~0 (_ BitVec 32))) (let ((.cse30 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2470))) (let ((.cse27 (let ((.cse31 (select .cse30 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse31 .cse1) (select .cse31 .cse2)) (select .cse31 .cse3)) (select .cse31 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (or (not (bvslt ~M~0 c_~N~0)) (bvslt (_ bv0 32) ~M~0) (not (bvsge ~M~0 (_ bv0 32))) (not (bvsgt c_~min1~0 .cse27)) (bvsgt c_~min3~0 (let ((.cse28 (select (store (store .cse30 |c_ULTIMATE.start_main_~#t2~0#1.base| v_prenex_15) |c_ULTIMATE.start_main_~#t3~0#1.base| v_prenex_14) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse29 (bvmul (_ bv4 32) ~M~0))) (concat (concat (concat (select .cse28 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse29)) (select .cse28 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse29))) (select .cse28 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32) .cse29))) (select .cse28 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse29))))) (= .cse27 c_~min3~0)))))) (forall ((~M~0 (_ BitVec 32))) (or (not (bvslt ~M~0 c_~N~0)) (bvslt (_ bv0 32) ~M~0) (forall ((v_ArrVal_2470 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse35 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2470))) (let ((.cse36 (let ((.cse37 (select .cse35 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse37 .cse1) (select .cse37 .cse2)) (select .cse37 .cse3)) (select .cse37 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (or (forall ((v_prenex_12 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_13 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse32 (let ((.cse33 (select (store (store .cse35 |c_ULTIMATE.start_main_~#t2~0#1.base| v_prenex_13) |c_ULTIMATE.start_main_~#t3~0#1.base| v_prenex_12) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse34 (bvmul (_ bv4 32) ~M~0))) (concat (concat (concat (select .cse33 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse34)) (select .cse33 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse34))) (select .cse33 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32) .cse34))) (select .cse33 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse34)))))) (or (not (bvsgt c_~min3~0 .cse32)) (bvsgt c_~min2~0 .cse32)))) (= .cse36 c_~min2~0) (not (bvsgt c_~min1~0 .cse36)))))) (not (bvsge ~M~0 (_ bv0 32))))) (or .cse7 (forall ((v_ArrVal_2470 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_15 (Array (_ BitVec 32) (_ BitVec 8))) (v_prenex_14 (Array (_ BitVec 32) (_ BitVec 8))) (~M~0 (_ BitVec 32))) (let ((.cse41 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2470))) (let ((.cse38 (let ((.cse42 (select .cse41 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse42 .cse1) (select .cse42 .cse2)) (select .cse42 .cse3)) (select .cse42 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (or (not (bvslt ~M~0 c_~N~0)) (bvslt (_ bv0 32) ~M~0) (= .cse38 c_~min2~0) (not (bvsge ~M~0 (_ bv0 32))) (not (bvsgt c_~min1~0 .cse38)) (bvsgt c_~min3~0 (let ((.cse39 (select (store (store .cse41 |c_ULTIMATE.start_main_~#t2~0#1.base| v_prenex_15) |c_ULTIMATE.start_main_~#t3~0#1.base| v_prenex_14) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse40 (bvmul (_ bv4 32) ~M~0))) (concat (concat (concat (select .cse39 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32) .cse40)) (select .cse39 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32) .cse40))) (select .cse39 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32) .cse40))) (select .cse39 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse40))))))))))))))) (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~3#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) is different from false [2022-12-14 08:18:32,120 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:18:32,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 825 treesize of output 300 [2022-12-14 08:18:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:18:32,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 3149 treesize of output 2841 [2022-12-14 08:18:32,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2064 treesize of output 1632 [2022-12-14 08:18:32,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:32,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2379 treesize of output 2135 [2022-12-14 08:18:32,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2092 treesize of output 1228 [2022-12-14 08:18:34,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:18:34,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 600 treesize of output 219 [2022-12-14 08:18:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,260 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:18:34,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 6135 treesize of output 5547 [2022-12-14 08:18:34,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 5446 treesize of output 4582 [2022-12-14 08:18:34,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:34,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:34,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 4653 treesize of output 4193 [2022-12-14 08:18:34,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 4150 treesize of output 2422