./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- 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 14:31:54,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:31:55,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:31:55,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:31:55,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:31:55,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:31:55,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:31:55,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:31:55,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:31:55,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:31:55,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:31:55,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:31:55,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:31:55,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:31:55,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:31:55,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:31:55,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:31:55,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:31:55,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:31:55,027 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:31:55,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:31:55,029 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:31:55,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:31:55,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:31:55,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:31:55,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:31:55,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:31:55,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:31:55,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:31:55,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:31:55,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:31:55,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:31:55,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:31:55,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:31:55,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:31:55,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:31:55,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:31:55,037 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:31:55,037 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:31:55,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:31:55,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:31:55,039 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 14:31:55,060 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:31:55,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:31:55,061 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:31:55,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:31:55,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:31:55,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:31:55,062 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:31:55,062 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:31:55,062 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:31:55,062 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:31:55,063 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:31:55,063 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:31:55,063 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:31:55,063 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:31:55,063 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:31:55,063 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:31:55,064 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:31:55,064 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:31:55,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 14:31:55,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 14:31:55,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:31:55,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:31:55,065 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 14:31:55,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:31:55,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:31:55,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:31:55,066 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 14:31:55,066 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 14:31:55,066 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 14:31:55,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:31:55,066 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:31:55,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:31:55,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:31:55,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:31:55,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:31:55,068 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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-12-14 14:31:55,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:31:55,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:31:55,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:31:55,278 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:31:55,278 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:31:55,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-14 14:31:57,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:31:57,971 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:31:57,972 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-14 14:31:57,976 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data/4ea2cfb98/bb07b6aeb970474c9863011e3f78f09b/FLAG7e9df158a [2022-12-14 14:31:58,384 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data/4ea2cfb98/bb07b6aeb970474c9863011e3f78f09b [2022-12-14 14:31:58,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:31:58,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:31:58,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:31:58,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:31:58,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:31:58,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:31:58" (1/1) ... [2022-12-14 14:31:58,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cafbec2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:58, skipping insertion in model container [2022-12-14 14:31:58,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:31:58" (1/1) ... [2022-12-14 14:31:58,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:31:58,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:31:58,548 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:31:58,550 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:31:58,553 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:31:58,554 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:31:58,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:31:58,555 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:31:58,563 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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-14 14:31:58,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:31:58,581 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 14:31:58,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6522e0e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:31:58, skipping insertion in model container [2022-12-14 14:31:58,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:31:58,582 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 14:31:58,583 INFO L158 Benchmark]: Toolchain (without parser) took 192.30ms. Allocated memory is still 146.8MB. Free memory was 118.3MB in the beginning and 108.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:31:58,583 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 146.8MB. Free memory is still 120.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:31:58,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.68ms. Allocated memory is still 146.8MB. Free memory was 117.8MB in the beginning and 108.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:31:58,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 146.8MB. Free memory is still 120.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 189.68ms. Allocated memory is still 146.8MB. Free memory was 117.8MB in the beginning and 108.2MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 107]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 --- 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 14:32:00,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:32:00,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:32:00,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:32:00,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:32:00,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:32:00,061 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:32:00,063 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:32:00,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:32:00,066 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:32:00,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:32:00,068 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:32:00,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:32:00,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:32:00,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:32:00,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:32:00,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:32:00,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:32:00,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:32:00,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:32:00,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:32:00,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:32:00,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:32:00,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:32:00,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:32:00,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:32:00,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:32:00,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:32:00,087 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:32:00,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:32:00,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:32:00,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:32:00,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:32:00,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:32:00,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:32:00,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:32:00,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:32:00,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:32:00,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:32:00,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:32:00,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:32:00,095 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 14:32:00,117 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:32:00,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:32:00,117 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:32:00,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:32:00,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:32:00,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:32:00,118 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:32:00,118 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:32:00,118 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:32:00,118 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:32:00,119 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:32:00,119 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:32:00,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 14:32:00,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 14:32:00,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:32:00,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:32:00,120 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 14:32:00,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:32:00,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:32:00,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:32:00,120 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 14:32:00,120 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 14:32:00,121 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 14:32:00,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:32:00,121 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 14:32:00,121 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 14:32:00,121 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 14:32:00,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:32:00,122 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:32:00,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:32:00,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 14:32:00,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:32:00,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:32:00,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:32:00,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:32:00,123 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 14:32:00,123 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:00,123 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:32:00,123 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 14:32:00,123 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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8799100fd609ab67add98408724f155026fd97a78e0a4112bb89c435f95463 [2022-12-14 14:32:00,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:32:00,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:32:00,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:32:00,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:32:00,349 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:32:00,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-14 14:32:02,955 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:32:03,112 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:32:03,112 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c [2022-12-14 14:32:03,118 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data/ac53e992a/5025a155293a48bd957992aa6557692b/FLAG04dd6fee5 [2022-12-14 14:32:03,128 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/data/ac53e992a/5025a155293a48bd957992aa6557692b [2022-12-14 14:32:03,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:32:03,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:32:03,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:32:03,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:32:03,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:32:03,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778518fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03, skipping insertion in model container [2022-12-14 14:32:03,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:32:03,156 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:32:03,279 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,281 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,285 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,286 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,287 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,287 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,294 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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-14 14:32:03,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:32:03,317 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 14:32:03,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:32:03,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,341 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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-14 14:32:03,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:32:03,351 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:32:03,369 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,370 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,371 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,372 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,373 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 14:32:03,373 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 14:32:03,377 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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/sv-benchmarks/c/weaver/popl20-more-min-le-max.wvr.c[2486,2499] [2022-12-14 14:32:03,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:32:03,395 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:32:03,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03 WrapperNode [2022-12-14 14:32:03,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:32:03,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:32:03,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:32:03,397 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:32:03,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,427 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-12-14 14:32:03,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:32:03,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:32:03,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:32:03,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:32:03,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,449 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:32:03,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:32:03,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:32:03,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:32:03,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (1/1) ... [2022-12-14 14:32:03,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:32:03,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:03,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:32:03,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:32:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:32:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 14:32:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 14:32:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 14:32:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 14:32:03,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 14:32:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 14:32:03,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 14:32:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 14:32:03,522 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 14:32:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 14:32:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 14:32:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 14:32:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:32:03,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:32:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 14:32:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 14:32:03,524 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 14:32:03,606 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:32:03,607 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:32:04,021 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:32:04,091 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:32:04,092 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 14:32:04,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:32:04 BoogieIcfgContainer [2022-12-14 14:32:04,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:32:04,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:32:04,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:32:04,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:32:04,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:32:03" (1/3) ... [2022-12-14 14:32:04,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b29a1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:32:04, skipping insertion in model container [2022-12-14 14:32:04,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:32:03" (2/3) ... [2022-12-14 14:32:04,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b29a1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:32:04, skipping insertion in model container [2022-12-14 14:32:04,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:32:04" (3/3) ... [2022-12-14 14:32:04,100 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-le-max.wvr.c [2022-12-14 14:32:04,114 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:32:04,114 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 14:32:04,114 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 14:32:04,181 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 14:32:04,209 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 14:32:04,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 177 transitions, 378 flow [2022-12-14 14:32:04,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 177 transitions, 378 flow [2022-12-14 14:32:04,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 177 transitions, 378 flow [2022-12-14 14:32:04,288 INFO L130 PetriNetUnfolder]: 10/174 cut-off events. [2022-12-14 14:32:04,289 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 14:32:04,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 10/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 0 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-12-14 14:32:04,295 INFO L119 LiptonReduction]: Number of co-enabled transitions 1742 [2022-12-14 14:32:26,103 INFO L134 LiptonReduction]: Checked pairs total: 2760 [2022-12-14 14:32:26,103 INFO L136 LiptonReduction]: Total number of compositions: 181 [2022-12-14 14:32:26,108 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 53 transitions, 130 flow [2022-12-14 14:32:26,146 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 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 14:32:26,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:32:26,163 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;@27a710f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:32:26,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-14 14:32:26,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 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 14:32:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 14:32:26,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:26,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 14:32:26,170 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash 22015, now seen corresponding path program 1 times [2022-12-14 14:32:26,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:26,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259941187] [2022-12-14 14:32:26,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:26,183 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 14:32:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:26,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:26,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:26,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 14:32:26,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:26,259 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 14:32:26,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:26,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:26,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259941187] [2022-12-14 14:32:26,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259941187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:26,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:26,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 14:32:26,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457413752] [2022-12-14 14:32:26,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:26,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 14:32:26,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:26,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 14:32:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:32:26,285 INFO L87 Difference]: Start difference. First operand has 694 states, 538 states have (on average 3.87546468401487) internal successors, (2085), 693 states have internal predecessors, (2085), 0 states have call successors, (0), 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 2 states, 1 states have (on average 2.0) 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 14:32:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:26,454 INFO L93 Difference]: Finished difference Result 379 states and 1114 transitions. [2022-12-14 14:32:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 14:32:26,456 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 14:32:26,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:26,470 INFO L225 Difference]: With dead ends: 379 [2022-12-14 14:32:26,470 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 14:32:26,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 14:32:26,473 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 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 14:32:26,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 14:32:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-12-14 14:32:26,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 314 states have (on average 3.5477707006369426) internal successors, (1114), 378 states have internal predecessors, (1114), 0 states have call successors, (0), 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 14:32:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1114 transitions. [2022-12-14 14:32:26,525 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1114 transitions. Word has length 2 [2022-12-14 14:32:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:26,526 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 1114 transitions. [2022-12-14 14:32:26,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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 14:32:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1114 transitions. [2022-12-14 14:32:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 14:32:26,527 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:26,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 14:32:26,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:26,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:26,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:26,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash 22016, now seen corresponding path program 1 times [2022-12-14 14:32:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:26,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165673068] [2022-12-14 14:32:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:26,733 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 14:32:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:26,757 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:26,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:26,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 14:32:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:27,005 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:27,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 14:32:27,041 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 14:32:27,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:27,042 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:27,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165673068] [2022-12-14 14:32:27,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165673068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:27,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:27,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 14:32:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498797885] [2022-12-14 14:32:27,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:27,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:27,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:27,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:27,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:27,045 INFO L87 Difference]: Start difference. First operand 379 states and 1114 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 14:32:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:27,260 INFO L93 Difference]: Finished difference Result 383 states and 1118 transitions. [2022-12-14 14:32:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:27,260 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 14:32:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:27,264 INFO L225 Difference]: With dead ends: 383 [2022-12-14 14:32:27,264 INFO L226 Difference]: Without dead ends: 383 [2022-12-14 14:32:27,264 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 14:32:27,265 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:27,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:32:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-12-14 14:32:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 380. [2022-12-14 14:32:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 315 states have (on average 3.549206349206349) internal successors, (1118), 379 states have internal predecessors, (1118), 0 states have call successors, (0), 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 14:32:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1118 transitions. [2022-12-14 14:32:27,288 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1118 transitions. Word has length 2 [2022-12-14 14:32:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:27,288 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 1118 transitions. [2022-12-14 14:32:27,288 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 14:32:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1118 transitions. [2022-12-14 14:32:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 14:32:27,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:27,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 14:32:27,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:27,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:27,491 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash 21888, now seen corresponding path program 1 times [2022-12-14 14:32:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:27,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398275975] [2022-12-14 14:32:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:27,495 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 14:32:27,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:27,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:27,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:32:27,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:27,675 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 14:32:27,675 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 14:32:27,689 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 14:32:27,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:27,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398275975] [2022-12-14 14:32:27,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398275975] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:27,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:27,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 14:32:27,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088114710] [2022-12-14 14:32:27,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:27,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:27,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:27,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:27,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:27,691 INFO L87 Difference]: Start difference. First operand 380 states and 1118 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 14:32:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:27,817 INFO L93 Difference]: Finished difference Result 378 states and 1114 transitions. [2022-12-14 14:32:27,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:27,818 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 14:32:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:27,821 INFO L225 Difference]: With dead ends: 378 [2022-12-14 14:32:27,821 INFO L226 Difference]: Without dead ends: 378 [2022-12-14 14:32:27,821 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 14:32:27,822 INFO L413 NwaCegarLoop]: 2 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, 2 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 14:32:27,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-12-14 14:32:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-12-14 14:32:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 315 states have (on average 3.5365079365079364) internal successors, (1114), 377 states have internal predecessors, (1114), 0 states have call successors, (0), 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 14:32:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1114 transitions. [2022-12-14 14:32:27,838 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1114 transitions. Word has length 2 [2022-12-14 14:32:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:27,839 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1114 transitions. [2022-12-14 14:32:27,839 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 14:32:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1114 transitions. [2022-12-14 14:32:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 14:32:27,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:27,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 14:32:27,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:28,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:28,041 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash 22012, now seen corresponding path program 1 times [2022-12-14 14:32:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:28,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858516096] [2022-12-14 14:32:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:28,044 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 14:32:28,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:28,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:28,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:28,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:32:28,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:28,226 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:28,226 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 14:32:28,246 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 14:32:28,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:28,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:28,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858516096] [2022-12-14 14:32:28,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858516096] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:28,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:28,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 14:32:28,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377216072] [2022-12-14 14:32:28,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:28,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:28,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:28,248 INFO L87 Difference]: Start difference. First operand 378 states and 1114 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 14:32:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:28,380 INFO L93 Difference]: Finished difference Result 377 states and 1112 transitions. [2022-12-14 14:32:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:28,381 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 14:32:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:28,382 INFO L225 Difference]: With dead ends: 377 [2022-12-14 14:32:28,382 INFO L226 Difference]: Without dead ends: 377 [2022-12-14 14:32:28,383 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 14:32:28,383 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:28,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-12-14 14:32:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 377. [2022-12-14 14:32:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 315 states have (on average 3.53015873015873) internal successors, (1112), 376 states have internal predecessors, (1112), 0 states have call successors, (0), 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 14:32:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1112 transitions. [2022-12-14 14:32:28,393 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1112 transitions. Word has length 2 [2022-12-14 14:32:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:28,393 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 1112 transitions. [2022-12-14 14:32:28,393 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 14:32:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1112 transitions. [2022-12-14 14:32:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 14:32:28,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:28,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 14:32:28,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:28,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:28,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash 682595, now seen corresponding path program 1 times [2022-12-14 14:32:28,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:28,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173853279] [2022-12-14 14:32:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:28,600 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 14:32:28,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:28,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:28,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 14:32:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:28,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:32:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:28,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:28,843 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 14:32:28,843 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 14:32:28,868 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 14:32:28,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 45 [2022-12-14 14:32:29,124 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 14:32:29,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:29,275 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 14:32:29,275 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:29,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173853279] [2022-12-14 14:32:29,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173853279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:29,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1736698265] [2022-12-14 14:32:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:29,276 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:29,277 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:29,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 14:32:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:29,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 14:32:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:29,504 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 14:32:29,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 14:32:29,528 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 14:32:29,528 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 14:32:29,567 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 14:32:29,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:29,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1736698265] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:29,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:32:29,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-12-14 14:32:29,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186018526] [2022-12-14 14:32:29,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:29,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:29,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:29,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:29,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:32:29,569 INFO L87 Difference]: Start difference. First operand 377 states and 1112 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 14:32:29,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:29,713 INFO L93 Difference]: Finished difference Result 326 states and 936 transitions. [2022-12-14 14:32:29,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:29,714 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 14:32:29,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:29,715 INFO L225 Difference]: With dead ends: 326 [2022-12-14 14:32:29,715 INFO L226 Difference]: Without dead ends: 326 [2022-12-14 14:32:29,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:32:29,716 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:29,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:29,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-14 14:32:29,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-12-14 14:32:29,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 274 states have (on average 3.4160583941605838) internal successors, (936), 325 states have internal predecessors, (936), 0 states have call successors, (0), 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 14:32:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 936 transitions. [2022-12-14 14:32:29,723 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 936 transitions. Word has length 3 [2022-12-14 14:32:29,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:29,723 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 936 transitions. [2022-12-14 14:32:29,723 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 14:32:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 936 transitions. [2022-12-14 14:32:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 14:32:29,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:29,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 14:32:29,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 14:32:29,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-14 14:32:30,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:30,126 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:30,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:30,127 INFO L85 PathProgramCache]: Analyzing trace with hash 682468, now seen corresponding path program 1 times [2022-12-14 14:32:30,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:30,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623366128] [2022-12-14 14:32:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:30,129 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 14:32:30,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:30,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:30,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 14:32:30,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:30,308 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:30,308 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 14:32:30,360 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 14:32:30,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:30,541 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 14:32:30,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623366128] [2022-12-14 14:32:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623366128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [72270199] [2022-12-14 14:32:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:30,542 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:30,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:30,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:30,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 14:32:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:30,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 14:32:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:30,709 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:30,709 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 14:32:30,738 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 14:32:30,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:30,798 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 14:32:30,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [72270199] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36137192] [2022-12-14 14:32:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:30,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:30,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:30,800 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:30,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:32:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 14:32:30,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:30,940 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:30,940 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 14:32:30,978 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 14:32:30,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:31,082 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 14:32:31,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36137192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:31,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:32:31,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 14:32:31,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992203765] [2022-12-14 14:32:31,082 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:31,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 14:32:31,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 14:32:31,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:32:31,083 INFO L87 Difference]: Start difference. First operand 326 states and 936 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 14:32:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:31,797 INFO L93 Difference]: Finished difference Result 651 states and 1875 transitions. [2022-12-14 14:32:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:32:31,798 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 14:32:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:31,800 INFO L225 Difference]: With dead ends: 651 [2022-12-14 14:32:31,800 INFO L226 Difference]: Without dead ends: 651 [2022-12-14 14:32:31,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:32:31,801 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 138 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:31,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 6 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:32:31,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-12-14 14:32:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 329. [2022-12-14 14:32:31,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 277 states have (on average 3.411552346570397) internal successors, (945), 328 states have internal predecessors, (945), 0 states have call successors, (0), 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 14:32:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 945 transitions. [2022-12-14 14:32:31,810 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 945 transitions. Word has length 3 [2022-12-14 14:32:31,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:31,810 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 945 transitions. [2022-12-14 14:32:31,810 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 14:32:31,810 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 945 transitions. [2022-12-14 14:32:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 14:32:31,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:31,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 14:32:31,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:32,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 14:32:32,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 14:32:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:32,413 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:32,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash 682592, now seen corresponding path program 1 times [2022-12-14 14:32:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:32,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590289485] [2022-12-14 14:32:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:32,416 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 14:32:32,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:32,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:32,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:32,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 14:32:32,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:32,556 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-14 14:32:32,556 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 14:32:32,603 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 14:32:32,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:32,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:32,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590289485] [2022-12-14 14:32:32,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590289485] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:32,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:32,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 14:32:32,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616811074] [2022-12-14 14:32:32,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:32,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:32,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:32,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:32,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:32,605 INFO L87 Difference]: Start difference. First operand 329 states and 945 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 14:32:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:32,735 INFO L93 Difference]: Finished difference Result 278 states and 766 transitions. [2022-12-14 14:32:32,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:32,735 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 14:32:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:32,736 INFO L225 Difference]: With dead ends: 278 [2022-12-14 14:32:32,736 INFO L226 Difference]: Without dead ends: 278 [2022-12-14 14:32:32,736 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 14:32:32,737 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:32,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-12-14 14:32:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-12-14 14:32:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 236 states have (on average 3.2457627118644066) internal successors, (766), 277 states have internal predecessors, (766), 0 states have call successors, (0), 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 14:32:32,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 766 transitions. [2022-12-14 14:32:32,742 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 766 transitions. Word has length 3 [2022-12-14 14:32:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:32,742 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 766 transitions. [2022-12-14 14:32:32,742 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 14:32:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 766 transitions. [2022-12-14 14:32:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 14:32:32,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:32,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 14:32:32,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:32,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:32,944 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:32,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash 655987058, now seen corresponding path program 1 times [2022-12-14 14:32:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:32,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195865691] [2022-12-14 14:32:32,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:32,947 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 14:32:32,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:32,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:32,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 14:32:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 14:32:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:33,104 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 14:32:33,105 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 14:32:33,185 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 14:32:33,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:33,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:33,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195865691] [2022-12-14 14:32:33,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195865691] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:33,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:33,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 14:32:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381254171] [2022-12-14 14:32:33,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:33,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:33,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:33,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:33,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:33,187 INFO L87 Difference]: Start difference. First operand 278 states and 766 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 14:32:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:33,311 INFO L93 Difference]: Finished difference Result 263 states and 731 transitions. [2022-12-14 14:32:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:33,312 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 14:32:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:33,313 INFO L225 Difference]: With dead ends: 263 [2022-12-14 14:32:33,313 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 14:32:33,313 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 14:32:33,314 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:33,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 14:32:33,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-12-14 14:32:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 227 states have (on average 3.2202643171806167) internal successors, (731), 262 states have internal predecessors, (731), 0 states have call successors, (0), 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 14:32:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 731 transitions. [2022-12-14 14:32:33,319 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 731 transitions. Word has length 5 [2022-12-14 14:32:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:33,319 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 731 transitions. [2022-12-14 14:32:33,319 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 14:32:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 731 transitions. [2022-12-14 14:32:33,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 14:32:33,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:33,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 14:32:33,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 14:32:33,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:33,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:33,521 INFO L85 PathProgramCache]: Analyzing trace with hash 655987059, now seen corresponding path program 1 times [2022-12-14 14:32:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:33,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941939467] [2022-12-14 14:32:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:33,523 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 14:32:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:33,526 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:33,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 14:32:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:33,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:33,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:33,738 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 14:32:33,739 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 14:32:33,748 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 14:32:33,926 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 14:32:33,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:34,119 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 14:32:34,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:34,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941939467] [2022-12-14 14:32:34,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941939467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:34,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [389019772] [2022-12-14 14:32:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:34,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:34,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:34,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:34,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 14:32:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:34,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:32:34,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:34,348 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 14:32:34,349 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 14:32:34,363 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 26 treesize of output 24 [2022-12-14 14:32:34,460 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 14:32:34,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:34,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [389019772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:34,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:32:34,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 14:32:34,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894675903] [2022-12-14 14:32:34,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:34,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:34,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:32:34,462 INFO L87 Difference]: Start difference. First operand 263 states and 731 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 14:32:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:34,583 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2022-12-14 14:32:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:34,583 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 14:32:34,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:34,586 INFO L225 Difference]: With dead ends: 248 [2022-12-14 14:32:34,586 INFO L226 Difference]: Without dead ends: 248 [2022-12-14 14:32:34,586 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 14:32:34,586 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:34,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-12-14 14:32:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-12-14 14:32:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 218 states have (on average 3.1926605504587156) internal successors, (696), 247 states have internal predecessors, (696), 0 states have call successors, (0), 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 14:32:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 696 transitions. [2022-12-14 14:32:34,591 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 696 transitions. Word has length 5 [2022-12-14 14:32:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:34,591 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 696 transitions. [2022-12-14 14:32:34,591 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 14:32:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 696 transitions. [2022-12-14 14:32:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:32:34,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:34,592 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 14:32:34,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-12-14 14:32:34,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:34,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:34,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1139550655, now seen corresponding path program 2 times [2022-12-14 14:32:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:34,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018507107] [2022-12-14 14:32:34,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:32:34,996 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 14:32:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:34,998 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:34,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 14:32:35,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:32:35,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:35,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 14:32:35,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:35,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:35,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 14:32:35,276 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 14:32:35,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:35,783 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 14:32:35,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:35,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018507107] [2022-12-14 14:32:35,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018507107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:35,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1794598488] [2022-12-14 14:32:35,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:32:35,783 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:35,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:35,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:35,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 14:32:35,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:32:35,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:35,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 14:32:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:36,058 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:36,058 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 14:32:36,121 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 14:32:36,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:36,844 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 14:32:36,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1794598488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:36,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173197085] [2022-12-14 14:32:36,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:32:36,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:36,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:36,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 14:32:36,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:32:36,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 14:32:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:37,048 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:37,049 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 14:32:37,096 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 14:32:37,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:37,244 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 14:32:37,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173197085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:37,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:32:37,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 14:32:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854283549] [2022-12-14 14:32:37,244 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:37,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 14:32:37,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 14:32:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:32:37,245 INFO L87 Difference]: Start difference. First operand 248 states and 696 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 14:32:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:40,755 INFO L93 Difference]: Finished difference Result 1941 states and 5503 transitions. [2022-12-14 14:32:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 14:32:40,757 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 14:32:40,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:40,763 INFO L225 Difference]: With dead ends: 1941 [2022-12-14 14:32:40,763 INFO L226 Difference]: Without dead ends: 1941 [2022-12-14 14:32:40,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:32:40,763 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1149 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:40,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 56 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 14:32:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-12-14 14:32:40,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 254. [2022-12-14 14:32:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 224 states have (on average 3.1607142857142856) internal successors, (708), 253 states have internal predecessors, (708), 0 states have call successors, (0), 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 14:32:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 708 transitions. [2022-12-14 14:32:40,777 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 708 transitions. Word has length 6 [2022-12-14 14:32:40,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:40,777 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 708 transitions. [2022-12-14 14:32:40,777 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 14:32:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 708 transitions. [2022-12-14 14:32:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:32:40,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:40,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 14:32:40,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-12-14 14:32:41,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 14:32:41,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 14:32:41,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:41,379 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1139242691, now seen corresponding path program 1 times [2022-12-14 14:32:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:41,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545226533] [2022-12-14 14:32:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:41,380 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 14:32:41,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:41,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:41,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 14:32:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:32:41,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:41,504 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 14:32:41,504 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 14:32:41,521 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 14:32:41,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:41,521 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:41,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545226533] [2022-12-14 14:32:41,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545226533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:41,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:41,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:32:41,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183837067] [2022-12-14 14:32:41,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:41,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:32:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:32:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:32:41,523 INFO L87 Difference]: Start difference. First operand 254 states and 708 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 14:32:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:41,653 INFO L93 Difference]: Finished difference Result 176 states and 478 transitions. [2022-12-14 14:32:41,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:32:41,653 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 14:32:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:41,654 INFO L225 Difference]: With dead ends: 176 [2022-12-14 14:32:41,654 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 14:32:41,654 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 14:32:41,655 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:41,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:41,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 14:32:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-12-14 14:32:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 161 states have (on average 2.968944099378882) internal successors, (478), 175 states have internal predecessors, (478), 0 states have call successors, (0), 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 14:32:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 478 transitions. [2022-12-14 14:32:41,658 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 478 transitions. Word has length 6 [2022-12-14 14:32:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:41,658 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 478 transitions. [2022-12-14 14:32:41,658 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 14:32:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 478 transitions. [2022-12-14 14:32:41,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:32:41,658 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:41,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 14:32:41,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 14:32:41,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:41,859 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1139242690, now seen corresponding path program 1 times [2022-12-14 14:32:41,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:41,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931515937] [2022-12-14 14:32:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:41,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:32:41,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:41,862 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:41,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 14:32:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:41,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:32:41,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:42,009 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 14:32:42,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:42,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931515937] [2022-12-14 14:32:42,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931515937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:42,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:42,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:32:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821682470] [2022-12-14 14:32:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:42,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:32:42,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:32:42,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:32:42,011 INFO L87 Difference]: Start difference. First operand 176 states and 478 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 14:32:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:42,184 INFO L93 Difference]: Finished difference Result 270 states and 732 transitions. [2022-12-14 14:32:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:32:42,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 14:32:42,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:42,186 INFO L225 Difference]: With dead ends: 270 [2022-12-14 14:32:42,186 INFO L226 Difference]: Without dead ends: 270 [2022-12-14 14:32:42,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:32:42,186 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 91 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:42,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 4 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:32:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-12-14 14:32:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 210. [2022-12-14 14:32:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 195 states have (on average 3.1384615384615384) internal successors, (612), 209 states have internal predecessors, (612), 0 states have call successors, (0), 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 14:32:42,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 612 transitions. [2022-12-14 14:32:42,190 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 612 transitions. Word has length 6 [2022-12-14 14:32:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:42,190 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 612 transitions. [2022-12-14 14:32:42,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 14:32:42,191 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 612 transitions. [2022-12-14 14:32:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:32:42,191 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:42,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:42,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 14:32:42,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:42,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash -956780730, now seen corresponding path program 1 times [2022-12-14 14:32:42,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:42,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110714490] [2022-12-14 14:32:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:42,395 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 14:32:42,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:42,398 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:42,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:42,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 14:32:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:42,572 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:42,573 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 14:32:42,687 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 14:32:42,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:43,004 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 14:32:43,005 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110714490] [2022-12-14 14:32:43,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110714490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:43,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686565328] [2022-12-14 14:32:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:43,005 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:43,006 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:43,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 14:32:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:43,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:32:43,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:43,247 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 14:32:43,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:43,446 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 14:32:43,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [686565328] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:43,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130925757] [2022-12-14 14:32:43,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:43,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:43,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:43,447 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:43,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 14:32:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:32:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:43,570 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 14:32:43,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:43,587 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 14:32:43,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130925757] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:43,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:32:43,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-12-14 14:32:43,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616085613] [2022-12-14 14:32:43,588 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:43,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 14:32:43,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 14:32:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:32:43,589 INFO L87 Difference]: Start difference. First operand 210 states and 612 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 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 14:32:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:46,148 INFO L93 Difference]: Finished difference Result 535 states and 1521 transitions. [2022-12-14 14:32:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 14:32:46,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 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 14:32:46,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:46,150 INFO L225 Difference]: With dead ends: 535 [2022-12-14 14:32:46,150 INFO L226 Difference]: Without dead ends: 535 [2022-12-14 14:32:46,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 14:32:46,151 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 699 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:46,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 41 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 14:32:46,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-12-14 14:32:46,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 415. [2022-12-14 14:32:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 400 states have (on average 3.2025) internal successors, (1281), 414 states have internal predecessors, (1281), 0 states have call successors, (0), 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 14:32:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1281 transitions. [2022-12-14 14:32:46,159 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1281 transitions. Word has length 7 [2022-12-14 14:32:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:46,159 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 1281 transitions. [2022-12-14 14:32:46,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 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 14:32:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1281 transitions. [2022-12-14 14:32:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:32:46,159 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:46,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:46,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 14:32:46,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-12-14 14:32:46,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 14:32:46,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:46,762 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:46,763 INFO L85 PathProgramCache]: Analyzing trace with hash -956615420, now seen corresponding path program 1 times [2022-12-14 14:32:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:46,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620945942] [2022-12-14 14:32:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:46,765 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 14:32:46,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:46,766 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:46,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:46,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 14:32:46,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:47,025 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:47,026 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 14:32:47,194 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 14:32:47,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:47,407 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 14:32:47,407 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:47,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620945942] [2022-12-14 14:32:47,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620945942] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:47,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422738188] [2022-12-14 14:32:47,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:47,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:47,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:47,409 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:47,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 14:32:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:47,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:32:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:47,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 14:32:47,669 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 14:32:47,669 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 14:32:47,759 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 14:32:47,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:47,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [422738188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:47,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:32:47,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 14:32:47,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252093245] [2022-12-14 14:32:47,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:47,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:47,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:47,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:47,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:32:47,761 INFO L87 Difference]: Start difference. First operand 415 states and 1281 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 14:32:47,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:47,861 INFO L93 Difference]: Finished difference Result 369 states and 1134 transitions. [2022-12-14 14:32:47,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:47,861 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 14:32:47,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:47,863 INFO L225 Difference]: With dead ends: 369 [2022-12-14 14:32:47,863 INFO L226 Difference]: Without dead ends: 369 [2022-12-14 14:32:47,863 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 14:32:47,864 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2 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 14:32:47,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-12-14 14:32:47,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2022-12-14 14:32:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 359 states have (on average 3.1587743732590527) internal successors, (1134), 368 states have internal predecessors, (1134), 0 states have call successors, (0), 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 14:32:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1134 transitions. [2022-12-14 14:32:47,869 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1134 transitions. Word has length 7 [2022-12-14 14:32:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:47,870 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 1134 transitions. [2022-12-14 14:32:47,870 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 14:32:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1134 transitions. [2022-12-14 14:32:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:32:47,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:47,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:47,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 14:32:48,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 14:32:48,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:48,272 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:48,273 INFO L85 PathProgramCache]: Analyzing trace with hash -956615419, now seen corresponding path program 1 times [2022-12-14 14:32:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:48,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730144937] [2022-12-14 14:32:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:48,274 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 14:32:48,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:48,277 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:48,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:32:48,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:48,451 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-12-14 14:32:48,451 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 46 [2022-12-14 14:32:48,469 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 14:32:48,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:48,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730144937] [2022-12-14 14:32:48,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730144937] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:48,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:48,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 14:32:48,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850384826] [2022-12-14 14:32:48,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:48,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:32:48,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:48,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:32:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:32:48,470 INFO L87 Difference]: Start difference. First operand 369 states and 1134 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 14:32:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:48,552 INFO L93 Difference]: Finished difference Result 323 states and 987 transitions. [2022-12-14 14:32:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:32:48,552 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 14:32:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:48,555 INFO L225 Difference]: With dead ends: 323 [2022-12-14 14:32:48,555 INFO L226 Difference]: Without dead ends: 323 [2022-12-14 14:32:48,555 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 14:32:48,556 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:48,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 2 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:32:48,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-12-14 14:32:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2022-12-14 14:32:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 3.1037735849056602) internal successors, (987), 322 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:32:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 987 transitions. [2022-12-14 14:32:48,563 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 987 transitions. Word has length 7 [2022-12-14 14:32:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:48,564 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 987 transitions. [2022-12-14 14:32:48,564 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 14:32:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 987 transitions. [2022-12-14 14:32:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 14:32:48,564 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:48,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:48,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 14:32:48,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:48,766 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash 409688322, now seen corresponding path program 1 times [2022-12-14 14:32:48,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:48,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915946963] [2022-12-14 14:32:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:48,769 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 14:32:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:48,772 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:48,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:48,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:32:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:48,925 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 14:32:48,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:32:48,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:48,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915946963] [2022-12-14 14:32:48,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915946963] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:32:48,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:32:48,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:32:48,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78458200] [2022-12-14 14:32:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:32:48,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:32:48,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:32:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:32:48,927 INFO L87 Difference]: Start difference. First operand 323 states and 987 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:32:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:49,118 INFO L93 Difference]: Finished difference Result 469 states and 1447 transitions. [2022-12-14 14:32:49,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:32:49,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 14:32:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:49,121 INFO L225 Difference]: With dead ends: 469 [2022-12-14 14:32:49,121 INFO L226 Difference]: Without dead ends: 469 [2022-12-14 14:32:49,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:32:49,121 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 62 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:49,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 4 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:32:49,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-12-14 14:32:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 393. [2022-12-14 14:32:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 388 states have (on average 3.306701030927835) internal successors, (1283), 392 states have internal predecessors, (1283), 0 states have call successors, (0), 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 14:32:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1283 transitions. [2022-12-14 14:32:49,133 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1283 transitions. Word has length 8 [2022-12-14 14:32:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:49,134 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 1283 transitions. [2022-12-14 14:32:49,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:32:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1283 transitions. [2022-12-14 14:32:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 14:32:49,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:49,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:32:49,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:49,335 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:49,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:49,337 INFO L85 PathProgramCache]: Analyzing trace with hash -184559863, now seen corresponding path program 1 times [2022-12-14 14:32:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:49,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440879378] [2022-12-14 14:32:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:49,338 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 14:32:49,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:49,339 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:49,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 14:32:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:49,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 14:32:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:49,582 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:49,583 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 14:32:49,703 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 14:32:49,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:50,033 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 14:32:50,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:50,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440879378] [2022-12-14 14:32:50,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440879378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:50,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1296593961] [2022-12-14 14:32:50,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:50,034 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:50,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:50,035 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:50,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 14:32:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:50,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:32:50,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:50,300 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 14:32:50,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:50,541 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 14:32:50,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1296593961] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255774265] [2022-12-14 14:32:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:32:50,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:50,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:50,543 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:50,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 14:32:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:32:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:32:50,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:50,673 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 14:32:50,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:50,693 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 14:32:50,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255774265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:50,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:32:50,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-12-14 14:32:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881868136] [2022-12-14 14:32:50,693 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 14:32:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 14:32:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:32:50,694 INFO L87 Difference]: Start difference. First operand 393 states and 1283 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 14:32:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:32:53,185 INFO L93 Difference]: Finished difference Result 637 states and 2029 transitions. [2022-12-14 14:32:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 14:32:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 9 [2022-12-14 14:32:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:32:53,188 INFO L225 Difference]: With dead ends: 637 [2022-12-14 14:32:53,188 INFO L226 Difference]: Without dead ends: 637 [2022-12-14 14:32:53,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 14:32:53,189 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 342 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:32:53,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 42 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 14:32:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-12-14 14:32:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 563. [2022-12-14 14:32:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 3.370967741935484) internal successors, (1881), 562 states have internal predecessors, (1881), 0 states have call successors, (0), 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 14:32:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1881 transitions. [2022-12-14 14:32:53,197 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1881 transitions. Word has length 9 [2022-12-14 14:32:53,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:32:53,197 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 1881 transitions. [2022-12-14 14:32:53,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 14:32:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1881 transitions. [2022-12-14 14:32:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 14:32:53,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:32:53,198 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 14:32:53,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 14:32:53,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 14:32:53,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 14:32:53,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:53,800 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:32:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:32:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1960653663, now seen corresponding path program 2 times [2022-12-14 14:32:53,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:32:53,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599280068] [2022-12-14 14:32:53,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:32:53,803 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 14:32:53,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:32:53,806 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:32:53,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 14:32:54,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:32:54,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:54,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 14:32:54,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:54,110 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:54,110 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 14:32:54,367 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 14:32:54,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:55,708 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 14:32:55,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:32:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599280068] [2022-12-14 14:32:55,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599280068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305170836] [2022-12-14 14:32:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:32:55,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:32:55,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:32:55,709 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:32:55,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 14:32:55,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:32:55,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:55,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 14:32:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:56,054 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:32:56,054 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 14:32:56,504 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 14:32:56,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:57,472 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 14:32:57,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [305170836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:57,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572045958] [2022-12-14 14:32:57,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:32:57,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:32:57,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:32:57,474 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:32:57,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 14:32:57,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:32:57,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:32:57,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 14:32:57,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:32:58,234 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 14:32:58,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:32:59,146 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 14:32:59,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572045958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:32:59,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:32:59,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 44 [2022-12-14 14:32:59,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430130900] [2022-12-14 14:32:59,147 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:32:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 14:32:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:32:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 14:32:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 14:32:59,149 INFO L87 Difference]: Start difference. First operand 563 states and 1881 transitions. Second operand has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 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 14:33:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:33:21,062 INFO L93 Difference]: Finished difference Result 1721 states and 5471 transitions. [2022-12-14 14:33:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 14:33:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 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 14:33:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:33:21,069 INFO L225 Difference]: With dead ends: 1721 [2022-12-14 14:33:21,069 INFO L226 Difference]: Without dead ends: 1721 [2022-12-14 14:33:21,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=712, Invalid=4258, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 14:33:21,070 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1046 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 3528 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:33:21,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 286 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3528 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-12-14 14:33:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-12-14 14:33:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 903. [2022-12-14 14:33:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 898 states have (on average 3.4198218262806237) internal successors, (3071), 902 states have internal predecessors, (3071), 0 states have call successors, (0), 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 14:33:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3071 transitions. [2022-12-14 14:33:21,090 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3071 transitions. Word has length 11 [2022-12-14 14:33:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:33:21,090 INFO L495 AbstractCegarLoop]: Abstraction has 903 states and 3071 transitions. [2022-12-14 14:33:21,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 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 14:33:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3071 transitions. [2022-12-14 14:33:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 14:33:21,091 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:33:21,091 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 14:33:21,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 14:33:21,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-12-14 14:33:21,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 14:33:21,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:33:21,693 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:33:21,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:33:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash -224844959, now seen corresponding path program 3 times [2022-12-14 14:33:21,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:33:21,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872425524] [2022-12-14 14:33:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:33:21,695 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 14:33:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:33:21,698 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:33:21,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 14:33:21,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 14:33:21,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:33:21,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 14:33:21,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:33:21,985 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:33:21,985 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 14:33:22,288 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 14:33:22,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:33:24,905 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 14:33:24,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:33:24,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872425524] [2022-12-14 14:33:24,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872425524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:33:24,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861461058] [2022-12-14 14:33:24,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:33:24,905 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:33:24,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:33:24,908 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:33:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 14:33:25,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 14:33:25,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:33:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:33:25,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:33:25,617 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:33:25,617 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 14:33:25,849 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 14:33:25,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:33:28,759 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 14:33:28,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861461058] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:33:28,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446546015] [2022-12-14 14:33:28,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:33:28,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:33:28,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:33:28,761 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:33:28,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 14:33:30,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 14:33:30,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:33:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:33:30,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:33:30,479 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:33:30,479 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 14:33:30,618 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 14:33:30,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:33:30,949 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 14:33:30,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446546015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:33:30,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:33:30,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 14:33:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051674068] [2022-12-14 14:33:30,949 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:33:30,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 14:33:30,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:33:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 14:33:30,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 14:33:30,951 INFO L87 Difference]: Start difference. First operand 903 states and 3071 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 14:33:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:33:49,436 INFO L93 Difference]: Finished difference Result 8393 states and 29865 transitions. [2022-12-14 14:33:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 14:33:49,438 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 14:33:49,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:33:49,477 INFO L225 Difference]: With dead ends: 8393 [2022-12-14 14:33:49,477 INFO L226 Difference]: Without dead ends: 8393 [2022-12-14 14:33:49,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 14:33:49,479 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 3692 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 2591 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3692 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 2596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:33:49,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3692 Valid, 246 Invalid, 2596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2591 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-12-14 14:33:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-12-14 14:33:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 915. [2022-12-14 14:33:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 910 states have (on average 3.401098901098901) internal successors, (3095), 914 states have internal predecessors, (3095), 0 states have call successors, (0), 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 14:33:49,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3095 transitions. [2022-12-14 14:33:49,570 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3095 transitions. Word has length 12 [2022-12-14 14:33:49,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:33:49,571 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 3095 transitions. [2022-12-14 14:33:49,571 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 14:33:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3095 transitions. [2022-12-14 14:33:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 14:33:49,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:33:49,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-12-14 14:33:49,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-12-14 14:33:49,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 14:33:49,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 14:33:50,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:33:50,173 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:33:50,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:33:50,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1719129023, now seen corresponding path program 3 times [2022-12-14 14:33:50,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:33:50,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417632417] [2022-12-14 14:33:50,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:33:50,176 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 14:33:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:33:50,179 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:33:50,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 14:33:50,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:33:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:33:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:33:50,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:33:50,488 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:33:50,489 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 14:33:50,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:33:50,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:33:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:33:51,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:33:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417632417] [2022-12-14 14:33:51,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417632417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:33:51,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [199132555] [2022-12-14 14:33:51,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:33:51,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:33:51,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:33:51,802 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:33:51,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 14:33:52,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:33:52,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:33:52,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 14:33:52,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:33:52,271 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:33:52,271 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 14:33:52,956 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 13 treesize of output 9 [2022-12-14 14:33:52,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:33:52,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:33:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:33:55,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [199132555] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:33:55,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290679289] [2022-12-14 14:33:55,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:33:55,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:33:55,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:33:55,345 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:33:55,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 14:33:55,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:33:55,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:33:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 14:33:55,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:33:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:33:56,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:33:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:33:57,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290679289] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:33:57,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:33:57,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 56 [2022-12-14 14:33:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935164790] [2022-12-14 14:33:57,860 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:33:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 14:33:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:33:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 14:33:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 14:33:57,861 INFO L87 Difference]: Start difference. First operand 915 states and 3095 transitions. Second operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:34:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:27,155 INFO L93 Difference]: Finished difference Result 2962 states and 9144 transitions. [2022-12-14 14:34:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 14:34:27,157 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 14:34:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:27,163 INFO L225 Difference]: With dead ends: 2962 [2022-12-14 14:34:27,163 INFO L226 Difference]: Without dead ends: 2962 [2022-12-14 14:34:27,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3405 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=2096, Invalid=9460, Unknown=0, NotChecked=0, Total=11556 [2022-12-14 14:34:27,165 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3937 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 7310 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3937 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 7388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 7310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:27,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3937 Valid, 660 Invalid, 7388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 7310 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2022-12-14 14:34:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2022-12-14 14:34:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 1466. [2022-12-14 14:34:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1461 states have (on average 3.6427104722792607) internal successors, (5322), 1465 states have internal predecessors, (5322), 0 states have call successors, (0), 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 14:34:27,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 5322 transitions. [2022-12-14 14:34:27,199 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 5322 transitions. Word has length 13 [2022-12-14 14:34:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:27,200 INFO L495 AbstractCegarLoop]: Abstraction has 1466 states and 5322 transitions. [2022-12-14 14:34:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:34:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 5322 transitions. [2022-12-14 14:34:27,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 14:34:27,201 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:27,201 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:27,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-14 14:34:27,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 14:34:27,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-14 14:34:27,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:27,803 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:34:27,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1183864677, now seen corresponding path program 2 times [2022-12-14 14:34:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:34:27,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707986287] [2022-12-14 14:34:27,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:34:27,806 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 14:34:27,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:34:27,809 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:34:27,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 14:34:27,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:34:27,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:27,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 14:34:27,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:28,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:34:28,042 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 14:34:28,299 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 14:34:28,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:29,613 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 14:34:29,614 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:34:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707986287] [2022-12-14 14:34:29,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707986287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:34:29,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [215706953] [2022-12-14 14:34:29,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:34:29,614 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:34:29,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:34:29,615 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:34:29,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 14:34:29,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:34:29,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 14:34:29,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:29,941 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:34:29,941 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 14:34:30,435 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 14:34:30,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:31,487 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 14:34:31,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [215706953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:34:31,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335632797] [2022-12-14 14:34:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 14:34:31,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:31,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:31,488 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:31,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 14:34:31,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 14:34:31,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:34:31,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:31,743 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:34:31,743 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 14:34:32,006 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 14:34:32,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:32,486 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 14:34:32,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335632797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:34:32,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:34:32,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-12-14 14:34:32,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731236225] [2022-12-14 14:34:32,487 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:34:32,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 14:34:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:34:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 14:34:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 14:34:32,488 INFO L87 Difference]: Start difference. First operand 1466 states and 5322 transitions. Second operand has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 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 14:34:43,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:34:43,619 INFO L93 Difference]: Finished difference Result 2078 states and 6820 transitions. [2022-12-14 14:34:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 14:34:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 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 14:34:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:34:43,626 INFO L225 Difference]: With dead ends: 2078 [2022-12-14 14:34:43,626 INFO L226 Difference]: Without dead ends: 2078 [2022-12-14 14:34:43,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=460, Invalid=1990, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 14:34:43,627 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 882 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:34:43,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 111 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-14 14:34:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-12-14 14:34:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1628. [2022-12-14 14:34:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1623 states have (on average 3.584719654959951) internal successors, (5818), 1627 states have internal predecessors, (5818), 0 states have call successors, (0), 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 14:34:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5818 transitions. [2022-12-14 14:34:43,656 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5818 transitions. Word has length 13 [2022-12-14 14:34:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:34:43,656 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 5818 transitions. [2022-12-14 14:34:43,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 33 states have internal predecessors, (52), 0 states have call successors, (0), 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 14:34:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5818 transitions. [2022-12-14 14:34:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 14:34:43,657 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:34:43,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:34:43,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 14:34:43,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 14:34:44,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 14:34:44,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:34:44,260 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:34:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:34:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1360809733, now seen corresponding path program 3 times [2022-12-14 14:34:44,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:34:44,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382804190] [2022-12-14 14:34:44,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:34:44,262 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 14:34:44,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:34:44,263 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:34:44,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 14:34:44,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:34:44,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:44,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 14:34:44,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:44,592 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:34:44,593 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 14:34:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:34:44,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:34:45,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:34:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382804190] [2022-12-14 14:34:45,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382804190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:34:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1351179077] [2022-12-14 14:34:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:34:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:34:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:34:45,928 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:34:45,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 14:34:46,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:34:46,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:46,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 14:34:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:46,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:34:46,451 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 14:34:47,084 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 13 treesize of output 9 [2022-12-14 14:34:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:34:47,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:34:49,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1351179077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:34:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775363635] [2022-12-14 14:34:49,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:34:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:34:49,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:34:49,679 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:34:49,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 14:34:49,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:34:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:34:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 14:34:49,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:34:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:34:50,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:34:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:34:52,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775363635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:34:52,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:34:52,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 56 [2022-12-14 14:34:52,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542852271] [2022-12-14 14:34:52,636 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:34:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 14:34:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:34:52,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 14:34:52,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 14:34:52,639 INFO L87 Difference]: Start difference. First operand 1628 states and 5818 transitions. Second operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 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 14:35:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:35:21,110 INFO L93 Difference]: Finished difference Result 3316 states and 10700 transitions. [2022-12-14 14:35:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 14:35:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 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 14:35:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:35:21,124 INFO L225 Difference]: With dead ends: 3316 [2022-12-14 14:35:21,124 INFO L226 Difference]: Without dead ends: 3316 [2022-12-14 14:35:21,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3464 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=2150, Invalid=9622, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 14:35:21,126 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2951 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 6355 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2951 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 6441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 6355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:35:21,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2951 Valid, 595 Invalid, 6441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 6355 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-12-14 14:35:21,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2022-12-14 14:35:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 2088. [2022-12-14 14:35:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2083 states have (on average 3.7301968314930387) internal successors, (7770), 2087 states have internal predecessors, (7770), 0 states have call successors, (0), 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 14:35:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 7770 transitions. [2022-12-14 14:35:21,170 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 7770 transitions. Word has length 15 [2022-12-14 14:35:21,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:35:21,170 INFO L495 AbstractCegarLoop]: Abstraction has 2088 states and 7770 transitions. [2022-12-14 14:35:21,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 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 14:35:21,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 7770 transitions. [2022-12-14 14:35:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 14:35:21,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:35:21,173 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1] [2022-12-14 14:35:21,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-12-14 14:35:21,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 14:35:21,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-14 14:35:21,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:35:21,775 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:35:21,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:35:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash 597229310, now seen corresponding path program 4 times [2022-12-14 14:35:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:35:21,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984108480] [2022-12-14 14:35:21,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:35:21,778 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 14:35:21,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:35:21,780 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:35:21,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 14:35:21,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:35:21,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:35:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 14:35:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:22,066 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:35:22,067 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 14:35:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:35:22,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:35:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:35:26,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:35:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984108480] [2022-12-14 14:35:26,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984108480] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:35:26,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1543133669] [2022-12-14 14:35:26,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:35:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:35:26,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:35:26,405 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:35:26,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-12-14 14:35:26,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:35:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:35:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 14:35:26,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:35:28,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:35:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:35:30,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1543133669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:35:30,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579594959] [2022-12-14 14:35:30,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:35:30,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:35:30,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:35:30,754 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:35:30,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 14:35:30,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:35:30,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:35:30,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 14:35:30,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:35:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:35:32,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:35:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:35:34,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579594959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:35:34,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:35:34,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14, 14, 14, 14] total 78 [2022-12-14 14:35:34,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419246166] [2022-12-14 14:35:34,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:35:34,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-12-14 14:35:34,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:35:34,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-12-14 14:35:34,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=5582, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 14:35:34,286 INFO L87 Difference]: Start difference. First operand 2088 states and 7770 transitions. Second operand has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 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 14:37:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:37:02,881 INFO L93 Difference]: Finished difference Result 6272 states and 21656 transitions. [2022-12-14 14:37:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-14 14:37:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 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 20 [2022-12-14 14:37:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:37:02,897 INFO L225 Difference]: With dead ends: 6272 [2022-12-14 14:37:02,897 INFO L226 Difference]: Without dead ends: 6272 [2022-12-14 14:37:02,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5752 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=2939, Invalid=19411, Unknown=0, NotChecked=0, Total=22350 [2022-12-14 14:37:02,900 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 3790 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 18184 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3790 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 18254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 18184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:37:02,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3790 Valid, 1578 Invalid, 18254 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [70 Valid, 18184 Invalid, 0 Unknown, 0 Unchecked, 56.0s Time] [2022-12-14 14:37:02,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6272 states. [2022-12-14 14:37:02,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6272 to 2920. [2022-12-14 14:37:02,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2915 states have (on average 3.7385934819897084) internal successors, (10898), 2919 states have internal predecessors, (10898), 0 states have call successors, (0), 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 14:37:02,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 10898 transitions. [2022-12-14 14:37:02,969 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 10898 transitions. Word has length 20 [2022-12-14 14:37:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:37:02,970 INFO L495 AbstractCegarLoop]: Abstraction has 2920 states and 10898 transitions. [2022-12-14 14:37:02,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.139240506329114) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 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 14:37:02,970 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 10898 transitions. [2022-12-14 14:37:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 14:37:02,973 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:37:02,973 INFO L195 NwaCegarLoop]: trace histogram [11, 6, 1, 1, 1, 1, 1] [2022-12-14 14:37:02,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 14:37:03,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-14 14:37:03,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-12-14 14:37:03,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 14:37:03,575 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:37:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:37:03,577 INFO L85 PathProgramCache]: Analyzing trace with hash -409844669, now seen corresponding path program 5 times [2022-12-14 14:37:03,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:37:03,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691297743] [2022-12-14 14:37:03,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 14:37:03,578 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 14:37:03,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:37:03,579 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:37:03,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:37:03,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 14:37:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 14:37:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:04,036 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:37:04,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 14:37:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:37:04,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:37:09,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:37:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691297743] [2022-12-14 14:37:09,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691297743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1190768024] [2022-12-14 14:37:09,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 14:37:09,168 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:37:09,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:37:09,169 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:37:09,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 14:37:10,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 14:37:10,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:10,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 14:37:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:37:12,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:37:15,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1190768024] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040297649] [2022-12-14 14:37:15,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 14:37:15,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:37:15,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:37:15,469 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:37:15,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 14:37:19,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 14:37:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:37:19,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 14:37:19,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:37:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:37:20,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:37:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:37:20,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040297649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:37:20,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:37:20,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16, 16, 16, 16] total 74 [2022-12-14 14:37:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743238000] [2022-12-14 14:37:20,657 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:37:20,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-14 14:37:20,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:37:20,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-14 14:37:20,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=5139, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 14:37:20,659 INFO L87 Difference]: Start difference. First operand 2920 states and 10898 transitions. Second operand has 75 states, 75 states have (on average 1.12) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:39:12,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:39:12,772 INFO L93 Difference]: Finished difference Result 7181 states and 24809 transitions. [2022-12-14 14:39:12,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-12-14 14:39:12,775 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.12) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 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 22 [2022-12-14 14:39:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:39:12,788 INFO L225 Difference]: With dead ends: 7181 [2022-12-14 14:39:12,788 INFO L226 Difference]: Without dead ends: 7181 [2022-12-14 14:39:12,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5669 ImplicationChecksByTransitivity, 64.6s TimeCoverageRelationStatistics Valid=2683, Invalid=20269, Unknown=0, NotChecked=0, Total=22952 [2022-12-14 14:39:12,790 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 4742 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 21510 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4742 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 21592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 21510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:39:12,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4742 Valid, 1975 Invalid, 21592 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [82 Valid, 21510 Invalid, 0 Unknown, 0 Unchecked, 57.6s Time] [2022-12-14 14:39:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7181 states. [2022-12-14 14:39:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7181 to 3179. [2022-12-14 14:39:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3174 states have (on average 3.7539382482671706) internal successors, (11915), 3178 states have internal predecessors, (11915), 0 states have call successors, (0), 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 14:39:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 11915 transitions. [2022-12-14 14:39:12,898 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 11915 transitions. Word has length 22 [2022-12-14 14:39:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:39:12,898 INFO L495 AbstractCegarLoop]: Abstraction has 3179 states and 11915 transitions. [2022-12-14 14:39:12,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.12) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:39:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 11915 transitions. [2022-12-14 14:39:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 14:39:12,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:39:12,905 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:39:12,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:39:13,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 14:39:13,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-12-14 14:39:13,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:13,508 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:39:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:39:13,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1845432798, now seen corresponding path program 4 times [2022-12-14 14:39:13,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:39:13,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196922340] [2022-12-14 14:39:13,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:39:13,512 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 14:39:13,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:39:13,513 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:39:13,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:39:13,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:39:13,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:39:13,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 14:39:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:13,838 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:39:13,839 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 14:39:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:39:14,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:39:18,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:39:18,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196922340] [2022-12-14 14:39:18,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196922340] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:18,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930481019] [2022-12-14 14:39:18,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:39:18,279 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:39:18,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:39:18,280 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:39:18,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 14:39:18,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:39:18,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:39:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 14:39:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:39:20,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:39:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930481019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146854723] [2022-12-14 14:39:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:39:22,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:39:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:39:22,778 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:39:22,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 14:39:22,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:39:22,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:39:22,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 14:39:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:39:23,033 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:39:23,033 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 14:39:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:39:25,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:39:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:39:29,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146854723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:39:29,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:39:29,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14, 14, 14, 14] total 85 [2022-12-14 14:39:29,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691399068] [2022-12-14 14:39:29,333 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:39:29,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-12-14 14:39:29,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:39:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-12-14 14:39:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=6727, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 14:39:29,334 INFO L87 Difference]: Start difference. First operand 3179 states and 11915 transitions. Second operand has 86 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 85 states have internal predecessors, (110), 0 states have call successors, (0), 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 14:41:11,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:41:11,716 INFO L93 Difference]: Finished difference Result 6849 states and 22991 transitions. [2022-12-14 14:41:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-14 14:41:11,718 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 85 states have internal predecessors, (110), 0 states have call successors, (0), 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 22 [2022-12-14 14:41:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:41:11,729 INFO L225 Difference]: With dead ends: 6849 [2022-12-14 14:41:11,729 INFO L226 Difference]: Without dead ends: 6849 [2022-12-14 14:41:11,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6396 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=3136, Invalid=21356, Unknown=0, NotChecked=0, Total=24492 [2022-12-14 14:41:11,731 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4418 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 17549 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4418 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 17641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 17549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:41:11,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4418 Valid, 1504 Invalid, 17641 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [92 Valid, 17549 Invalid, 0 Unknown, 0 Unchecked, 49.1s Time] [2022-12-14 14:41:11,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6849 states. [2022-12-14 14:41:11,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6849 to 3603. [2022-12-14 14:41:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3598 states have (on average 3.72568093385214) internal successors, (13405), 3602 states have internal predecessors, (13405), 0 states have call successors, (0), 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 14:41:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 13405 transitions. [2022-12-14 14:41:11,806 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 13405 transitions. Word has length 22 [2022-12-14 14:41:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:41:11,806 INFO L495 AbstractCegarLoop]: Abstraction has 3603 states and 13405 transitions. [2022-12-14 14:41:11,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.2790697674418605) internal successors, (110), 85 states have internal predecessors, (110), 0 states have call successors, (0), 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 14:41:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 13405 transitions. [2022-12-14 14:41:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 14:41:11,811 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:41:11,811 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] [2022-12-14 14:41:11,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-14 14:41:12,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:41:12,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 14:41:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 14:41:12,413 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:41:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:41:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash 764110138, now seen corresponding path program 1 times [2022-12-14 14:41:12,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:41:12,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456266400] [2022-12-14 14:41:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:41:12,416 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 14:41:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:41:12,418 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:41:12,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:41:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:41:12,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 14:41:12,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:41:12,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:41:12,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 19 [2022-12-14 14:41:12,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:41:12,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 55 [2022-12-14 14:41:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:41:12,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:41:15,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 14:41:15,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 40 [2022-12-14 14:41:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 14:41:17,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:41:17,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456266400] [2022-12-14 14:41:17,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456266400] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 14:41:17,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:41:17,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-12-14 14:41:17,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727777729] [2022-12-14 14:41:17,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:41:17,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:41:17,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:41:17,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:41:17,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2022-12-14 14:41:17,168 INFO L87 Difference]: Start difference. First operand 3603 states and 13405 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:41:19,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:41:19,366 INFO L93 Difference]: Finished difference Result 3602 states and 13404 transitions. [2022-12-14 14:41:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:41:19,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-12-14 14:41:19,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:41:19,374 INFO L225 Difference]: With dead ends: 3602 [2022-12-14 14:41:19,374 INFO L226 Difference]: Without dead ends: 2586 [2022-12-14 14:41:19,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=19, Invalid=35, Unknown=2, NotChecked=0, Total=56 [2022-12-14 14:41:19,374 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:41:19,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:41:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2022-12-14 14:41:19,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2570. [2022-12-14 14:41:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2566 states have (on average 3.7634450506625097) internal successors, (9657), 2569 states have internal predecessors, (9657), 0 states have call successors, (0), 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 14:41:19,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 9657 transitions. [2022-12-14 14:41:19,410 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 9657 transitions. Word has length 22 [2022-12-14 14:41:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:41:19,411 INFO L495 AbstractCegarLoop]: Abstraction has 2570 states and 9657 transitions. [2022-12-14 14:41:19,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:41:19,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 9657 transitions. [2022-12-14 14:41:19,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 14:41:19,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:41:19,412 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1] [2022-12-14 14:41:19,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:41:19,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:41:19,614 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:41:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:41:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash -820758463, now seen corresponding path program 6 times [2022-12-14 14:41:19,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:41:19,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459685004] [2022-12-14 14:41:19,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 14:41:19,616 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 14:41:19,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:41:19,620 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:41:19,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 14:41:20,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-14 14:41:20,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:41:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 14:41:20,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:41:20,147 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:41:20,147 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 14:41:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:41:21,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:41:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:41:27,895 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:41:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459685004] [2022-12-14 14:41:27,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459685004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:41:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1453456491] [2022-12-14 14:41:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 14:41:27,895 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:41:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:41:27,896 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:41:27,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 14:41:31,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-14 14:41:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:41:31,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 14:41:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:41:31,394 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:41:31,394 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 14:41:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:41:32,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:41:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 18 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:41:38,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1453456491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:41:38,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014953472] [2022-12-14 14:41:38,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 14:41:38,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:41:38,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:41:38,497 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:41:38,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 14:41:40,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-14 14:41:40,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:41:40,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 14:41:40,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:41:40,210 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:41:40,210 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 14:41:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:41:41,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:41:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:41:47,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014953472] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:41:47,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:41:47,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20, 20, 21, 21] total 89 [2022-12-14 14:41:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574027420] [2022-12-14 14:41:47,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:41:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-12-14 14:41:47,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:41:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-12-14 14:41:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=7171, Unknown=0, NotChecked=0, Total=8010 [2022-12-14 14:41:47,182 INFO L87 Difference]: Start difference. First operand 2570 states and 9657 transitions. Second operand has 90 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 89 states have internal predecessors, (102), 0 states have call successors, (0), 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 14:42:59,297 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 143 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:43:11,824 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 149 DAG size of output: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:43:24,306 WARN L233 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 155 DAG size of output: 144 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:43:36,499 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 161 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:43:49,347 WARN L233 SmtUtils]: Spent 7.18s on a formula simplification. DAG size of input: 170 DAG size of output: 153 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:44:04,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:04,522 INFO L93 Difference]: Finished difference Result 8366 states and 27043 transitions. [2022-12-14 14:44:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-14 14:44:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 89 states have internal predecessors, (102), 0 states have call successors, (0), 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 23 [2022-12-14 14:44:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:04,542 INFO L225 Difference]: With dead ends: 8366 [2022-12-14 14:44:04,542 INFO L226 Difference]: Without dead ends: 8174 [2022-12-14 14:44:04,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5233 ImplicationChecksByTransitivity, 106.0s TimeCoverageRelationStatistics Valid=2902, Invalid=14654, Unknown=0, NotChecked=0, Total=17556 [2022-12-14 14:44:04,544 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4665 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 12136 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4665 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 12227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 12136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:04,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4665 Valid, 1037 Invalid, 12227 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [91 Valid, 12136 Invalid, 0 Unknown, 0 Unchecked, 50.9s Time] [2022-12-14 14:44:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8174 states. [2022-12-14 14:44:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8174 to 3084. [2022-12-14 14:44:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3080 states have (on average 3.647727272727273) internal successors, (11235), 3083 states have internal predecessors, (11235), 0 states have call successors, (0), 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 14:44:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 11235 transitions. [2022-12-14 14:44:04,616 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 11235 transitions. Word has length 23 [2022-12-14 14:44:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:04,616 INFO L495 AbstractCegarLoop]: Abstraction has 3084 states and 11235 transitions. [2022-12-14 14:44:04,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 89 states have internal predecessors, (102), 0 states have call successors, (0), 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 14:44:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 11235 transitions. [2022-12-14 14:44:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 14:44:04,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:04,618 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-12-14 14:44:04,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 14:44:04,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-12-14 14:44:05,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-12-14 14:44:05,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:44:05,220 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-14 14:44:05,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:05,221 INFO L85 PathProgramCache]: Analyzing trace with hash 508736929, now seen corresponding path program 4 times [2022-12-14 14:44:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 14:44:05,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248453324] [2022-12-14 14:44:05,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:44:05,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 14:44:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 14:44:05,226 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -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 14:44:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-14 14:44:05,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:44:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 14:44:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:05,547 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:44:05,547 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 14:44:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:06,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:17,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 14:44:17,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248453324] [2022-12-14 14:44:17,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248453324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:17,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1130546960] [2022-12-14 14:44:17,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:44:17,970 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 14:44:17,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 14:44:17,971 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 14:44:17,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 14:44:18,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:44:18,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:18,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 14:44:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:18,469 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:44:18,469 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 14:44:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:19,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:21,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1130546960] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:21,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468051090] [2022-12-14 14:44:21,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:44:21,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:21,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:21,528 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:21,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ebc5f901-3644-4edb-b7d7-b8cdce1c73a5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 14:44:21,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:44:21,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 14:44:21,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:21,862 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 14:44:21,862 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 14:44:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:22,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:23,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468051090] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:23,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 14:44:23,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 62 [2022-12-14 14:44:23,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804122353] [2022-12-14 14:44:23,233 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 14:44:23,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 14:44:23,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 14:44:23,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 14:44:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 14:44:23,234 INFO L87 Difference]: Start difference. First operand 3084 states and 11235 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 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 14:44:49,633 WARN L233 SmtUtils]: Spent 18.38s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:45:08,680 WARN L233 SmtUtils]: Spent 17.07s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:45:23,092 WARN L233 SmtUtils]: Spent 12.63s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:45:53,143 WARN L233 SmtUtils]: Spent 28.72s on a formula simplification. DAG size of input: 254 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:46:05,957 WARN L233 SmtUtils]: Spent 11.13s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:46:31,086 WARN L233 SmtUtils]: Spent 23.75s on a formula simplification. DAG size of input: 246 DAG size of output: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:46:40,979 WARN L233 SmtUtils]: Spent 7.95s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:47:04,947 WARN L233 SmtUtils]: Spent 22.48s on a formula simplification. DAG size of input: 236 DAG size of output: 236 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:47:16,449 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)