./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/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_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/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_024a3d1f-2164-4b0c-8949-736e8b574803/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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- 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 09:21:58,855 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:21:58,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:21:58,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:21:58,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:21:58,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:21:58,875 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:21:58,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:21:58,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:21:58,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:21:58,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:21:58,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:21:58,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:21:58,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:21:58,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:21:58,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:21:58,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:21:58,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:21:58,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:21:58,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:21:58,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:21:58,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:21:58,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:21:58,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:21:58,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:21:58,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:21:58,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:21:58,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:21:58,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:21:58,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:21:58,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:21:58,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:21:58,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:21:58,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:21:58,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:21:58,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:21:58,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:21:58,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:21:58,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:21:58,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:21:58,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:21:58,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:21:58,924 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:21:58,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:21:58,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:21:58,925 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:21:58,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:21:58,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:21:58,926 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:21:58,926 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:21:58,926 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:21:58,926 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:21:58,926 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:21:58,927 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:21:58,927 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:21:58,927 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:21:58,927 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:21:58,927 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:21:58,927 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:21:58,928 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:21:58,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:21:58,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:21:58,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:21:58,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:21:58,929 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:21:58,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:21:58,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:21:58,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:21:58,929 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:21:58,930 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:21:58,930 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:21:58,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:21:58,930 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:21:58,930 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:21:58,930 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:21:58,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:21:58,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:21:58,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:21:58,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:21:58,931 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:21:58,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:21:58,931 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:21:58,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:21:58,932 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:21:58,932 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_024a3d1f-2164-4b0c-8949-736e8b574803/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-12-14 09:21:59,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:21:59,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:21:59,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:21:59,133 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:21:59,133 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:21:59,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-14 09:22:01,721 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:22:01,872 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:22:01,872 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-14 09:22:01,877 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data/42009b66f/7576f1e2d82e4c7d9beb8787baf23693/FLAG02d05151d [2022-12-14 09:22:01,888 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data/42009b66f/7576f1e2d82e4c7d9beb8787baf23693 [2022-12-14 09:22:01,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:22:01,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:22:01,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:01,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:22:01,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:22:01,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:01" (1/1) ... [2022-12-14 09:22:01,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e84ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:01, skipping insertion in model container [2022-12-14 09:22:01,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:01" (1/1) ... [2022-12-14 09:22:01,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:22:01,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:22:02,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:02,029 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:02,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:02,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:02,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:02,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:02,040 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_024a3d1f-2164-4b0c-8949-736e8b574803/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-14 09:22:02,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:02,055 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 09:22:02,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@407b949f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:02, skipping insertion in model container [2022-12-14 09:22:02,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:02,055 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 09:22:02,057 INFO L158 Benchmark]: Toolchain (without parser) took 165.64ms. Allocated memory is still 157.3MB. Free memory was 124.0MB in the beginning and 113.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 09:22:02,057 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 157.3MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 09:22:02,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.11ms. Allocated memory is still 157.3MB. Free memory was 123.4MB in the beginning and 113.5MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 09:22:02,058 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 157.3MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.11ms. Allocated memory is still 157.3MB. Free memory was 123.4MB in the beginning and 113.5MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/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_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/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_024a3d1f-2164-4b0c-8949-736e8b574803/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 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- 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 09:22:03,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:22:03,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:22:03,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:22:03,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:22:03,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:22:03,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:22:03,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:22:03,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:22:03,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:22:03,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:22:03,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:22:03,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:22:03,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:22:03,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:22:03,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:22:03,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:22:03,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:22:03,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:22:03,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:22:03,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:22:03,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:22:03,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:22:03,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:22:03,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:22:03,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:22:03,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:22:03,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:22:03,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:22:03,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:22:03,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:22:03,426 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:22:03,427 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:22:03,428 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:22:03,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:22:03,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:22:03,429 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:22:03,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:22:03,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:22:03,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:22:03,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:22:03,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 09:22:03,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:22:03,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:22:03,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:22:03,449 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:22:03,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:22:03,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:22:03,450 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:22:03,450 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:22:03,450 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:22:03,450 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:22:03,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:22:03,450 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:22:03,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:22:03,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:22:03,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:22:03,451 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:22:03,451 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:22:03,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:22:03,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:22:03,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:22:03,452 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:22:03,452 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:22:03,452 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:22:03,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:22:03,453 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:22:03,453 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 09:22:03,453 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 09:22:03,453 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:22:03,453 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:22:03,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:22:03,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 09:22:03,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:22:03,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:22:03,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:22:03,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:22:03,461 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 09:22:03,462 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:03,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:22:03,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 09:22:03,462 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_024a3d1f-2164-4b0c-8949-736e8b574803/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-12-14 09:22:03,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:22:03,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:22:03,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:22:03,710 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:22:03,710 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:22:03,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-14 09:22:06,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:22:06,488 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:22:06,488 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-12-14 09:22:06,494 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data/92fd8879a/8202f0270c4c4618aff8de8013fd0baf/FLAGe0213e0a4 [2022-12-14 09:22:06,505 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/data/92fd8879a/8202f0270c4c4618aff8de8013fd0baf [2022-12-14 09:22:06,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:22:06,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:22:06,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:06,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:22:06,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:22:06,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d22befd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06, skipping insertion in model container [2022-12-14 09:22:06,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:22:06,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:22:06,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,647 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,649 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,650 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,655 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_024a3d1f-2164-4b0c-8949-736e8b574803/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-14 09:22:06,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:06,672 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 09:22:06,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:22:06,678 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,678 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,679 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,680 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,681 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,685 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_024a3d1f-2164-4b0c-8949-736e8b574803/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-14 09:22:06,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:06,691 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:22:06,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,703 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,704 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,704 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,705 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 09:22:06,706 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 09:22:06,709 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_024a3d1f-2164-4b0c-8949-736e8b574803/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-12-14 09:22:06,712 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:06,724 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:22:06,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06 WrapperNode [2022-12-14 09:22:06,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:06,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:22:06,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:22:06,725 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:22:06,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,754 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-12-14 09:22:06,755 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:22:06,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:22:06,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:22:06,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:22:06,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:22:06,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:22:06,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:22:06,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:22:06,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (1/1) ... [2022-12-14 09:22:06,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:22:06,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:06,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:22:06,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:22:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:22:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 09:22:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:22:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 09:22:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 09:22:06,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 09:22:06,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 09:22:06,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 09:22:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 09:22:06,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 09:22:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 09:22:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 09:22:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:22:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:22:06,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:22:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:22:06,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 09:22:06,840 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 09:22:06,922 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:22:06,923 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:22:07,346 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:22:07,416 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:22:07,416 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 09:22:07,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:22:07 BoogieIcfgContainer [2022-12-14 09:22:07,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:22:07,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:22:07,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:22:07,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:22:07,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:22:06" (1/3) ... [2022-12-14 09:22:07,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e815f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:22:07, skipping insertion in model container [2022-12-14 09:22:07,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:06" (2/3) ... [2022-12-14 09:22:07,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e815f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:22:07, skipping insertion in model container [2022-12-14 09:22:07,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:22:07" (3/3) ... [2022-12-14 09:22:07,424 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2022-12-14 09:22:07,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:22:07,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 09:22:07,437 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:22:07,499 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 09:22:07,533 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:22:07,548 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-12-14 09:22:07,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-12-14 09:22:07,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-12-14 09:22:07,616 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-12-14 09:22:07,616 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 09:22:07,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-12-14 09:22:07,624 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-12-14 09:22:27,663 INFO L134 LiptonReduction]: Checked pairs total: 3606 [2022-12-14 09:22:27,663 INFO L136 LiptonReduction]: Total number of compositions: 175 [2022-12-14 09:22:27,668 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-12-14 09:22:27,730 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:27,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:22:27,752 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;@585d0460, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:22:27,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-14 09:22:27,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:22:27,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:27,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:22:27,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:27,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:27,769 INFO L85 PathProgramCache]: Analyzing trace with hash 23174, now seen corresponding path program 1 times [2022-12-14 09:22:27,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878479697] [2022-12-14 09:22:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:27,781 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 09:22:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:27,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:27,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:22:27,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:28,036 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:28,037 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 09:22:28,076 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 09:22:28,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:28,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:28,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878479697] [2022-12-14 09:22:28,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878479697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:28,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:28,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:22:28,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528456558] [2022-12-14 09:22:28,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:28,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:28,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:28,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:28,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:28,114 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:28,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:28,454 INFO L93 Difference]: Finished difference Result 1496 states and 5128 transitions. [2022-12-14 09:22:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:28,456 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 09:22:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:28,475 INFO L225 Difference]: With dead ends: 1496 [2022-12-14 09:22:28,475 INFO L226 Difference]: Without dead ends: 1496 [2022-12-14 09:22:28,475 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 09:22:28,477 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:28,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 6 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:22:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-12-14 09:22:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 750. [2022-12-14 09:22:28,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.165316045380875) internal successors, (2570), 749 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2570 transitions. [2022-12-14 09:22:28,542 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2570 transitions. Word has length 2 [2022-12-14 09:22:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:28,543 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2570 transitions. [2022-12-14 09:22:28,543 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 09:22:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2570 transitions. [2022-12-14 09:22:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:22:28,543 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:28,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:22:28,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:28,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:28,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:28,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:28,748 INFO L85 PathProgramCache]: Analyzing trace with hash 23324, now seen corresponding path program 1 times [2022-12-14 09:22:28,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:28,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731334542] [2022-12-14 09:22:28,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:28,752 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 09:22:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:28,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:28,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:28,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:22:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:28,934 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 09:22:28,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:28,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:28,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731334542] [2022-12-14 09:22:28,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731334542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:28,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:28,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:22:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035483159] [2022-12-14 09:22:28,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:28,937 INFO L87 Difference]: Start difference. First operand 750 states and 2570 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:29,099 INFO L93 Difference]: Finished difference Result 751 states and 2567 transitions. [2022-12-14 09:22:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:29,100 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 09:22:29,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:29,103 INFO L225 Difference]: With dead ends: 751 [2022-12-14 09:22:29,103 INFO L226 Difference]: Without dead ends: 751 [2022-12-14 09:22:29,104 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 09:22:29,105 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:29,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:22:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-12-14 09:22:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 750. [2022-12-14 09:22:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.160453808752026) internal successors, (2567), 749 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2567 transitions. [2022-12-14 09:22:29,143 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2567 transitions. Word has length 2 [2022-12-14 09:22:29,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:29,143 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2567 transitions. [2022-12-14 09:22:29,143 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 09:22:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2567 transitions. [2022-12-14 09:22:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:22:29,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:29,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:22:29,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,345 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 23173, now seen corresponding path program 1 times [2022-12-14 09:22:29,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225374054] [2022-12-14 09:22:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:29,346 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 09:22:29,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:29,348 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:29,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:22:29,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:29,453 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 09:22:29,453 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 09:22:29,464 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 09:22:29,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:29,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:29,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225374054] [2022-12-14 09:22:29,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225374054] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:29,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:29,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:22:29,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846304518] [2022-12-14 09:22:29,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:29,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:29,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:29,467 INFO L87 Difference]: Start difference. First operand 750 states and 2567 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:29,584 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-12-14 09:22:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:29,585 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 09:22:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:29,593 INFO L225 Difference]: With dead ends: 749 [2022-12-14 09:22:29,593 INFO L226 Difference]: Without dead ends: 749 [2022-12-14 09:22:29,593 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 09:22:29,595 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:29,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-12-14 09:22:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-12-14 09:22:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-12-14 09:22:29,626 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-12-14 09:22:29,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:29,626 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-12-14 09:22:29,626 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 09:22:29,627 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-12-14 09:22:29,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:22:29,627 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:29,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:22:29,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash 722875, now seen corresponding path program 1 times [2022-12-14 09:22:29,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:29,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790406565] [2022-12-14 09:22:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:29,830 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 09:22:29,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:29,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:22:29,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:30,059 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:30,059 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 09:22:30,116 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 09:22:30,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:30,303 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 09:22:30,303 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:30,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790406565] [2022-12-14 09:22:30,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790406565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:30,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1756847612] [2022-12-14 09:22:30,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:30,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:30,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:30,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:30,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 09:22:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:30,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:22:30,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:30,482 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:30,482 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 09:22:30,510 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 09:22:30,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:30,562 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 09:22:30,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1756847612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:30,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937993180] [2022-12-14 09:22:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:30,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:30,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:30,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:30,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:22:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 09:22:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:30,709 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:30,710 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 09:22:30,737 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 09:22:30,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:30,848 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 09:22:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937993180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:30,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:22:30,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 09:22:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214920692] [2022-12-14 09:22:30,849 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:30,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:22:30,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:22:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:22:30,850 INFO L87 Difference]: Start difference. First operand 749 states and 2565 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:32,528 INFO L93 Difference]: Finished difference Result 2242 states and 7693 transitions. [2022-12-14 09:22:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:22:32,530 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 09:22:32,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:32,539 INFO L225 Difference]: With dead ends: 2242 [2022-12-14 09:22:32,539 INFO L226 Difference]: Without dead ends: 2242 [2022-12-14 09:22:32,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:22:32,540 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 237 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:32,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 15 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 09:22:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2022-12-14 09:22:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 752. [2022-12-14 09:22:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 620 states have (on average 4.156451612903226) internal successors, (2577), 751 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2577 transitions. [2022-12-14 09:22:32,565 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2577 transitions. Word has length 3 [2022-12-14 09:22:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:32,565 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2577 transitions. [2022-12-14 09:22:32,565 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 09:22:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2577 transitions. [2022-12-14 09:22:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:22:32,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:32,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:22:32,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:32,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 09:22:32,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:22:33,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:33,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:33,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 723025, now seen corresponding path program 1 times [2022-12-14 09:22:33,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:33,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068825286] [2022-12-14 09:22:33,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:33,171 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 09:22:33,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:33,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:33,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:33,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:22:33,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:33,285 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-14 09:22:33,286 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 09:22:33,330 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 09:22:33,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:33,331 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:33,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068825286] [2022-12-14 09:22:33,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068825286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:33,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:33,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:22:33,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342468354] [2022-12-14 09:22:33,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:33,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:33,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:33,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:33,332 INFO L87 Difference]: Start difference. First operand 752 states and 2577 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:33,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:33,489 INFO L93 Difference]: Finished difference Result 626 states and 2073 transitions. [2022-12-14 09:22:33,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:33,490 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 09:22:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:33,493 INFO L225 Difference]: With dead ends: 626 [2022-12-14 09:22:33,493 INFO L226 Difference]: Without dead ends: 626 [2022-12-14 09:22:33,494 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 09:22:33,494 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:33,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:22:33,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-12-14 09:22:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2022-12-14 09:22:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 522 states have (on average 3.971264367816092) internal successors, (2073), 625 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 2073 transitions. [2022-12-14 09:22:33,512 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 2073 transitions. Word has length 3 [2022-12-14 09:22:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:33,513 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 2073 transitions. [2022-12-14 09:22:33,513 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 09:22:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 2073 transitions. [2022-12-14 09:22:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:22:33,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:33,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:22:33,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:33,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:33,715 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:33,717 INFO L85 PathProgramCache]: Analyzing trace with hash 723026, now seen corresponding path program 1 times [2022-12-14 09:22:33,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:33,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383518464] [2022-12-14 09:22:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:33,718 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 09:22:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:33,721 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:33,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 09:22:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:33,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:22:33,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:33,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:33,899 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 09:22:33,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-12-14 09:22:33,921 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 09:22:33,922 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 09:22:33,988 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 09:22:33,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:34,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383518464] [2022-12-14 09:22:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383518464] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:34,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:22:34,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-12-14 09:22:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453695860] [2022-12-14 09:22:34,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:34,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:22:34,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:34,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:22:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:22:34,102 INFO L87 Difference]: Start difference. First operand 626 states and 2073 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:34,254 INFO L93 Difference]: Finished difference Result 500 states and 1569 transitions. [2022-12-14 09:22:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:34,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 09:22:34,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:34,256 INFO L225 Difference]: With dead ends: 500 [2022-12-14 09:22:34,256 INFO L226 Difference]: Without dead ends: 500 [2022-12-14 09:22:34,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:22:34,257 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:34,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-12-14 09:22:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 500. [2022-12-14 09:22:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.7004716981132075) internal successors, (1569), 499 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1569 transitions. [2022-12-14 09:22:34,265 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1569 transitions. Word has length 3 [2022-12-14 09:22:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:34,265 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1569 transitions. [2022-12-14 09:22:34,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1569 transitions. [2022-12-14 09:22:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:22:34,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:34,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:22:34,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 09:22:34,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:34,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 694842809, now seen corresponding path program 1 times [2022-12-14 09:22:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469977093] [2022-12-14 09:22:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:34,470 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 09:22:34,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:34,473 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:34,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 09:22:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:22:34,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:34,664 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 09:22:34,665 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 09:22:34,750 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 09:22:34,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:34,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:34,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469977093] [2022-12-14 09:22:34,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469977093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:34,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:34,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:22:34,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761734273] [2022-12-14 09:22:34,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:34,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:34,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:34,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:34,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:34,751 INFO L87 Difference]: Start difference. First operand 500 states and 1569 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:34,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:34,871 INFO L93 Difference]: Finished difference Result 470 states and 1484 transitions. [2022-12-14 09:22:34,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:34,872 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 09:22:34,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:34,876 INFO L225 Difference]: With dead ends: 470 [2022-12-14 09:22:34,877 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 09:22:34,877 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 09:22:34,877 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:34,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 09:22:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-12-14 09:22:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6551724137931036) internal successors, (1484), 469 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1484 transitions. [2022-12-14 09:22:34,891 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1484 transitions. Word has length 5 [2022-12-14 09:22:34,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:34,891 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1484 transitions. [2022-12-14 09:22:34,892 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 09:22:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1484 transitions. [2022-12-14 09:22:34,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 09:22:34,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:34,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 09:22:34,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:35,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash 694842808, now seen corresponding path program 1 times [2022-12-14 09:22:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385571640] [2022-12-14 09:22:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:35,096 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 09:22:35,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:35,099 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:35,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:35,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:22:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:35,337 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 09:22:35,337 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 09:22:35,347 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 09:22:35,485 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 09:22:35,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:35,675 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 09:22:35,675 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:35,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385571640] [2022-12-14 09:22:35,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385571640] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:35,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1247358973] [2022-12-14 09:22:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:35,675 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:35,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:35,676 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:35,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 09:22:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:22:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:35,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:35,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:35,878 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 09:22:35,878 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 09:22:35,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-14 09:22:35,951 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 09:22:35,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:35,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1247358973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:35,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:22:35,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 09:22:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485849343] [2022-12-14 09:22:35,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:35,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:35,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:22:35,952 INFO L87 Difference]: Start difference. First operand 470 states and 1484 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:36,064 INFO L93 Difference]: Finished difference Result 440 states and 1399 transitions. [2022-12-14 09:22:36,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:36,065 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 09:22:36,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:36,069 INFO L225 Difference]: With dead ends: 440 [2022-12-14 09:22:36,069 INFO L226 Difference]: Without dead ends: 440 [2022-12-14 09:22:36,069 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 09:22:36,070 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:36,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:36,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-14 09:22:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-12-14 09:22:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6056701030927836) internal successors, (1399), 439 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1399 transitions. [2022-12-14 09:22:36,078 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1399 transitions. Word has length 5 [2022-12-14 09:22:36,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:36,078 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1399 transitions. [2022-12-14 09:22:36,078 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 09:22:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1399 transitions. [2022-12-14 09:22:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:22:36,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:36,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:22:36,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:36,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:36,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:36,481 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:36,482 INFO L85 PathProgramCache]: Analyzing trace with hash 65285545, now seen corresponding path program 1 times [2022-12-14 09:22:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:36,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939487458] [2022-12-14 09:22:36,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:36,483 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 09:22:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:36,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:36,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:36,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 09:22:36,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:36,749 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 09:22:36,750 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 09:22:36,767 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 09:22:36,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:36,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:36,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939487458] [2022-12-14 09:22:36,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939487458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:36,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:36,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:22:36,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848000165] [2022-12-14 09:22:36,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:36,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:22:36,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:36,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:22:36,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:22:36,769 INFO L87 Difference]: Start difference. First operand 440 states and 1399 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:36,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:36,894 INFO L93 Difference]: Finished difference Result 258 states and 798 transitions. [2022-12-14 09:22:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:22:36,895 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 09:22:36,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:36,896 INFO L225 Difference]: With dead ends: 258 [2022-12-14 09:22:36,896 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 09:22:36,896 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 09:22:36,896 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:36,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 09:22:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 09:22:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 237 states have (on average 3.367088607594937) internal successors, (798), 257 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 798 transitions. [2022-12-14 09:22:36,900 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 798 transitions. Word has length 6 [2022-12-14 09:22:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:36,900 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 798 transitions. [2022-12-14 09:22:36,901 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 09:22:36,901 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 798 transitions. [2022-12-14 09:22:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:22:36,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:36,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:22:36,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:37,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:37,101 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:37,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:37,102 INFO L85 PathProgramCache]: Analyzing trace with hash 65285546, now seen corresponding path program 1 times [2022-12-14 09:22:37,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:37,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654721931] [2022-12-14 09:22:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:37,102 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 09:22:37,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:37,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:37,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 09:22:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:37,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:22:37,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:37,249 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 09:22:37,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:37,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 09:22:37,474 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 09:22:37,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654721931] [2022-12-14 09:22:37,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654721931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149628364] [2022-12-14 09:22:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:37,475 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:37,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:37,475 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:37,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 09:22:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:37,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:22:37,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:37,658 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:37,658 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 09:22:37,811 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 09:22:37,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:38,060 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 09:22:38,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149628364] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:38,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645776209] [2022-12-14 09:22:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:38,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:38,062 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:22:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:22:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:38,196 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:38,197 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 09:22:38,383 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 09:22:38,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:38,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645776209] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:38,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-12-14 09:22:38,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4, 4] total 19 [2022-12-14 09:22:38,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339453746] [2022-12-14 09:22:38,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:38,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:22:38,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:38,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:22:38,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:22:38,525 INFO L87 Difference]: Start difference. First operand 258 states and 798 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:39,070 INFO L93 Difference]: Finished difference Result 408 states and 1256 transitions. [2022-12-14 09:22:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:22:39,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:22:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:39,073 INFO L225 Difference]: With dead ends: 408 [2022-12-14 09:22:39,073 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 09:22:39,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:22:39,073 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 101 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:39,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 7 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:22:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 09:22:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 308. [2022-12-14 09:22:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 287 states have (on average 3.5261324041811846) internal successors, (1012), 307 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 1012 transitions. [2022-12-14 09:22:39,079 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 1012 transitions. Word has length 6 [2022-12-14 09:22:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:39,079 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 1012 transitions. [2022-12-14 09:22:39,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 1012 transitions. [2022-12-14 09:22:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:22:39,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:39,079 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 09:22:39,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 09:22:39,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 09:22:39,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:39,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:39,681 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:39,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:39,683 INFO L85 PathProgramCache]: Analyzing trace with hash 64782278, now seen corresponding path program 2 times [2022-12-14 09:22:39,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:39,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425842643] [2022-12-14 09:22:39,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:22:39,684 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 09:22:39,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:39,685 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:39,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 09:22:39,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:22:39,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:22:39,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:22:39,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:39,844 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:39,845 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 09:22:39,970 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 09:22:39,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:40,523 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 09:22:40,523 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425842643] [2022-12-14 09:22:40,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425842643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:40,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261218626] [2022-12-14 09:22:40,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:22:40,523 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:40,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:40,524 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:40,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 09:22:40,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:22:40,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:22:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:22:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:40,743 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:40,743 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 09:22:40,797 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 09:22:40,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:40,889 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 09:22:40,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261218626] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:40,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104387215] [2022-12-14 09:22:40,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:22:40,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:40,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:40,891 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:40,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 09:22:40,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:22:40,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:22:40,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:22:40,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:41,079 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:41,079 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 09:22:41,162 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 09:22:41,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:41,933 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 09:22:41,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104387215] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:41,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:22:41,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 09:22:41,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147940647] [2022-12-14 09:22:41,933 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:41,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 09:22:41,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:41,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 09:22:41,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:22:41,935 INFO L87 Difference]: Start difference. First operand 308 states and 1012 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:45,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:45,657 INFO L93 Difference]: Finished difference Result 2722 states and 9032 transitions. [2022-12-14 09:22:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:22:45,658 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 09:22:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:45,667 INFO L225 Difference]: With dead ends: 2722 [2022-12-14 09:22:45,667 INFO L226 Difference]: Without dead ends: 2722 [2022-12-14 09:22:45,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:22:45,668 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 928 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:45,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 78 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 09:22:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2022-12-14 09:22:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 314. [2022-12-14 09:22:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4948805460750854) internal successors, (1024), 313 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1024 transitions. [2022-12-14 09:22:45,687 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1024 transitions. Word has length 6 [2022-12-14 09:22:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:45,688 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1024 transitions. [2022-12-14 09:22:45,688 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 09:22:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1024 transitions. [2022-12-14 09:22:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:22:45,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:45,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:45,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 09:22:45,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 09:22:46,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:46,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:46,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:46,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:46,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2023855181, now seen corresponding path program 1 times [2022-12-14 09:22:46,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:46,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660315173] [2022-12-14 09:22:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:46,290 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 09:22:46,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:46,291 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:46,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:46,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:22:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:46,436 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:46,436 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 09:22:46,525 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 09:22:46,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:46,854 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 09:22:46,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:46,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660315173] [2022-12-14 09:22:46,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660315173] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:46,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1591334239] [2022-12-14 09:22:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:46,855 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:46,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:46,855 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:46,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 09:22:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:22:46,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:47,107 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 09:22:47,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:47,273 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 09:22:47,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1591334239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476383779] [2022-12-14 09:22:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:47,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:47,275 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:47,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 09:22:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:22:47,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:47,424 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:47,424 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 09:22:47,570 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 09:22:47,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:47,655 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 09:22:47,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476383779] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:47,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:22:47,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 21 [2022-12-14 09:22:47,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225672276] [2022-12-14 09:22:47,656 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:47,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:22:47,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:22:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:22:47,657 INFO L87 Difference]: Start difference. First operand 314 states and 1024 transitions. Second operand has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:50,394 INFO L93 Difference]: Finished difference Result 815 states and 2597 transitions. [2022-12-14 09:22:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 09:22:50,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 09:22:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:50,398 INFO L225 Difference]: With dead ends: 815 [2022-12-14 09:22:50,398 INFO L226 Difference]: Without dead ends: 815 [2022-12-14 09:22:50,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=285, Invalid=975, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 09:22:50,398 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 680 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:50,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 57 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 09:22:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-12-14 09:22:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 615. [2022-12-14 09:22:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 594 states have (on average 3.5505050505050506) internal successors, (2109), 614 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2109 transitions. [2022-12-14 09:22:50,409 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2109 transitions. Word has length 7 [2022-12-14 09:22:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:50,409 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2109 transitions. [2022-12-14 09:22:50,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2109 transitions. [2022-12-14 09:22:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:22:50,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:50,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:50,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:50,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:50,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-12-14 09:22:51,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:51,012 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:51,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:51,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2024023346, now seen corresponding path program 1 times [2022-12-14 09:22:51,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:51,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752431430] [2022-12-14 09:22:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:51,013 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 09:22:51,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:51,014 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:51,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:22:51,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:51,187 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:51,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:22:51,351 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 09:22:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:51,568 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 09:22:51,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:51,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752431430] [2022-12-14 09:22:51,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752431430] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:51,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [675935202] [2022-12-14 09:22:51,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:51,568 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:51,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:51,569 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:51,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 09:22:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:51,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:22:51,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:51,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:51,840 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 09:22:51,841 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 09:22:51,926 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 09:22:51,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:51,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [675935202] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:51,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:22:51,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 09:22:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352386057] [2022-12-14 09:22:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:51,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:51,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:22:51,928 INFO L87 Difference]: Start difference. First operand 615 states and 2109 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:52,039 INFO L93 Difference]: Finished difference Result 567 states and 1957 transitions. [2022-12-14 09:22:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:52,040 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 09:22:52,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:52,044 INFO L225 Difference]: With dead ends: 567 [2022-12-14 09:22:52,044 INFO L226 Difference]: Without dead ends: 567 [2022-12-14 09:22:52,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:22:52,045 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:52,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-12-14 09:22:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-12-14 09:22:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 552 states have (on average 3.545289855072464) internal successors, (1957), 566 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:52,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1957 transitions. [2022-12-14 09:22:52,053 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1957 transitions. Word has length 7 [2022-12-14 09:22:52,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:52,053 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1957 transitions. [2022-12-14 09:22:52,053 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 09:22:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1957 transitions. [2022-12-14 09:22:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:22:52,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:52,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:52,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 09:22:52,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:52,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:52,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:52,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2024023348, now seen corresponding path program 1 times [2022-12-14 09:22:52,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:52,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835370513] [2022-12-14 09:22:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:52,459 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 09:22:52,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:52,462 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:52,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:22:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:52,655 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 09:22:52,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 09:22:52,678 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 09:22:52,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:22:52,679 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:52,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835370513] [2022-12-14 09:22:52,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835370513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:52,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:52,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:22:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547641800] [2022-12-14 09:22:52,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:52,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:52,680 INFO L87 Difference]: Start difference. First operand 567 states and 1957 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:52,768 INFO L93 Difference]: Finished difference Result 519 states and 1805 transitions. [2022-12-14 09:22:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:52,768 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 09:22:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:52,772 INFO L225 Difference]: With dead ends: 519 [2022-12-14 09:22:52,772 INFO L226 Difference]: Without dead ends: 519 [2022-12-14 09:22:52,773 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 09:22:52,773 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:52,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-12-14 09:22:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-12-14 09:22:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 510 states have (on average 3.5392156862745097) internal successors, (1805), 518 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1805 transitions. [2022-12-14 09:22:52,786 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1805 transitions. Word has length 7 [2022-12-14 09:22:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:52,787 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1805 transitions. [2022-12-14 09:22:52,787 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 09:22:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1805 transitions. [2022-12-14 09:22:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 09:22:52,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:52,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:52,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2022-12-14 09:22:52,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:52,989 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:52,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1679790815, now seen corresponding path program 1 times [2022-12-14 09:22:52,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:52,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146520116] [2022-12-14 09:22:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:52,991 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 09:22:52,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:52,994 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:52,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:53,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:22:53,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:53,132 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 09:22:53,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:53,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 09:22:53,358 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 09:22:53,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:53,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146520116] [2022-12-14 09:22:53,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146520116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:53,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945685651] [2022-12-14 09:22:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:53,358 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:53,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:53,359 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:53,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 09:22:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:53,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:22:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:53,627 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 09:22:53,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:53,825 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 09:22:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945685651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60813878] [2022-12-14 09:22:53,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:53,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:53,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:53,827 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:53,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 09:22:53,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:53,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:22:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:53,990 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:53,990 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 09:22:54,239 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 09:22:54,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:54,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60813878] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:54,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-12-14 09:22:54,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4, 4, 4] total 21 [2022-12-14 09:22:54,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79362338] [2022-12-14 09:22:54,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:54,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:22:54,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:54,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:22:54,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:22:54,440 INFO L87 Difference]: Start difference. First operand 519 states and 1805 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:55,010 INFO L93 Difference]: Finished difference Result 765 states and 2679 transitions. [2022-12-14 09:22:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:22:55,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 09:22:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:55,014 INFO L225 Difference]: With dead ends: 765 [2022-12-14 09:22:55,014 INFO L226 Difference]: Without dead ends: 765 [2022-12-14 09:22:55,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:22:55,015 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 77 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:55,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 7 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:22:55,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-12-14 09:22:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 637. [2022-12-14 09:22:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 628 states have (on average 3.7436305732484074) internal successors, (2351), 636 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2351 transitions. [2022-12-14 09:22:55,025 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2351 transitions. Word has length 8 [2022-12-14 09:22:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:55,025 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 2351 transitions. [2022-12-14 09:22:55,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2351 transitions. [2022-12-14 09:22:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:22:55,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:55,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:55,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 09:22:55,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-12-14 09:22:55,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:55,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:55,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:22:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash -533905033, now seen corresponding path program 1 times [2022-12-14 09:22:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:22:55,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [688960303] [2022-12-14 09:22:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:55,631 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 09:22:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:22:55,633 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:22:55,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 09:22:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:22:55,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:55,803 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:22:55,803 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 09:22:55,951 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 09:22:55,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:56,311 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 09:22:56,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:22:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [688960303] [2022-12-14 09:22:56,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [688960303] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:56,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1207664049] [2022-12-14 09:22:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:22:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:22:56,313 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:22:56,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 09:22:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:22:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:56,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:56,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1207664049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:56,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961809792] [2022-12-14 09:22:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:56,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:56,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:56,871 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:56,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 09:22:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:56,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:22:56,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:57,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:22:57,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961809792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:57,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:22:57,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 23 [2022-12-14 09:22:57,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478220263] [2022-12-14 09:22:57,458 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:57,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 09:22:57,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:22:57,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 09:22:57,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:22:57,459 INFO L87 Difference]: Start difference. First operand 637 states and 2351 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:03,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:03,278 INFO L93 Difference]: Finished difference Result 1678 states and 5860 transitions. [2022-12-14 09:23:03,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 09:23:03,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:23:03,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:03,283 INFO L225 Difference]: With dead ends: 1678 [2022-12-14 09:23:03,284 INFO L226 Difference]: Without dead ends: 1678 [2022-12-14 09:23:03,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=388, Invalid=1418, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:23:03,284 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 972 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:03,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 50 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 09:23:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-12-14 09:23:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1142. [2022-12-14 09:23:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1133 states have (on average 3.9576345984112975) internal successors, (4484), 1141 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 4484 transitions. [2022-12-14 09:23:03,306 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 4484 transitions. Word has length 9 [2022-12-14 09:23:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:03,306 INFO L495 AbstractCegarLoop]: Abstraction has 1142 states and 4484 transitions. [2022-12-14 09:23:03,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:03,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 4484 transitions. [2022-12-14 09:23:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:23:03,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:03,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:23:03,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 09:23:03,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 09:23:03,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-14 09:23:03,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:03,910 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:23:03,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash 634178731, now seen corresponding path program 1 times [2022-12-14 09:23:03,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:23:03,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136558673] [2022-12-14 09:23:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:03,913 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 09:23:03,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:23:03,914 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:23:03,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 09:23:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:23:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:04,093 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:04,093 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 09:23:04,274 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 09:23:04,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:04,888 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 09:23:04,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:23:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136558673] [2022-12-14 09:23:04,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136558673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:04,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [14762035] [2022-12-14 09:23:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:04,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:23:04,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:23:04,889 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:23:04,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 09:23:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:23:05,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:05,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:05,124 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 09:23:05,375 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 09:23:05,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:05,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [14762035] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:05,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744995577] [2022-12-14 09:23:05,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:05,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:05,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:05,832 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:05,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 09:23:05,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:05,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:23:05,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:05,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:05,993 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 09:23:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:06,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:06,304 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 09:23:06,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744995577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:06,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:23:06,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-12-14 09:23:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073070003] [2022-12-14 09:23:06,305 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:23:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 09:23:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:23:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 09:23:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:23:06,306 INFO L87 Difference]: Start difference. First operand 1142 states and 4484 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:12,085 INFO L93 Difference]: Finished difference Result 2385 states and 9495 transitions. [2022-12-14 09:23:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:23:12,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 09:23:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:12,093 INFO L225 Difference]: With dead ends: 2385 [2022-12-14 09:23:12,093 INFO L226 Difference]: Without dead ends: 2385 [2022-12-14 09:23:12,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:23:12,094 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 257 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:12,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 51 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 09:23:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-12-14 09:23:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 1701. [2022-12-14 09:23:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1692 states have (on average 4.071513002364066) internal successors, (6889), 1700 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 6889 transitions. [2022-12-14 09:23:12,129 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 6889 transitions. Word has length 10 [2022-12-14 09:23:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:12,129 INFO L495 AbstractCegarLoop]: Abstraction has 1701 states and 6889 transitions. [2022-12-14 09:23:12,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 6889 transitions. [2022-12-14 09:23:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 09:23:12,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:12,130 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-14 09:23:12,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-14 09:23:12,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-12-14 09:23:12,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-12-14 09:23:12,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:23:12,732 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:23:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1116923551, now seen corresponding path program 2 times [2022-12-14 09:23:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:23:12,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287277995] [2022-12-14 09:23:12,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:23:12,735 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 09:23:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:23:12,738 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:23:12,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 09:23:12,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:23:12,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 09:23:12,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:12,971 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:12,971 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 09:23:13,261 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 09:23:13,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:14,496 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 09:23:14,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:23:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287277995] [2022-12-14 09:23:14,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287277995] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:14,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1343081887] [2022-12-14 09:23:14,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:23:14,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:23:14,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:23:14,497 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:23:14,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-12-14 09:23:14,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:23:14,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:14,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:23:14,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:15,065 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 09:23:15,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:15,757 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 09:23:15,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1343081887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:15,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753864743] [2022-12-14 09:23:15,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:23:15,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:15,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:15,758 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:15,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 09:23:15,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:23:15,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:15,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:23:15,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:16,299 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 09:23:16,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:16,864 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 09:23:16,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753864743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:16,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:23:16,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 9, 9] total 45 [2022-12-14 09:23:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512577178] [2022-12-14 09:23:16,864 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:23:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 09:23:16,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:23:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 09:23:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1599, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 09:23:16,865 INFO L87 Difference]: Start difference. First operand 1701 states and 6889 transitions. Second operand has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:37,724 INFO L93 Difference]: Finished difference Result 3496 states and 13178 transitions. [2022-12-14 09:23:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 09:23:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 09:23:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:37,734 INFO L225 Difference]: With dead ends: 3496 [2022-12-14 09:23:37,734 INFO L226 Difference]: Without dead ends: 3496 [2022-12-14 09:23:37,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1435, Invalid=4417, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 09:23:37,736 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1400 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:37,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 376 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2022-12-14 09:23:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2022-12-14 09:23:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 1978. [2022-12-14 09:23:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1969 states have (on average 3.9969527679024885) internal successors, (7870), 1977 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:37,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 7870 transitions. [2022-12-14 09:23:37,786 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 7870 transitions. Word has length 11 [2022-12-14 09:23:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:37,786 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 7870 transitions. [2022-12-14 09:23:37,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:37,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 7870 transitions. [2022-12-14 09:23:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:23:37,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:37,787 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:23:37,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-12-14 09:23:37,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-12-14 09:23:38,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 09:23:38,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:38,389 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:23:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash -439456757, now seen corresponding path program 1 times [2022-12-14 09:23:38,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:23:38,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081902047] [2022-12-14 09:23:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:38,392 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 09:23:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:23:38,394 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:23:38,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-14 09:23:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:23:38,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:38,641 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:38,642 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 09:23:38,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:38,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:38,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:23:38,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 11 [2022-12-14 09:23:38,917 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:23:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:39,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:23:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081902047] [2022-12-14 09:23:39,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081902047] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:39,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988909032] [2022-12-14 09:23:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:39,376 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:23:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:23:39,376 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:23:39,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-12-14 09:23:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:39,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:23:39,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:39,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:40,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988909032] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:40,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658268660] [2022-12-14 09:23:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:23:40,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:40,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:40,402 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:40,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 09:23:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:23:40,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:23:40,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:40,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:40,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658268660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:40,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:23:40,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 23 [2022-12-14 09:23:40,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260343425] [2022-12-14 09:23:40,825 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:23:40,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 09:23:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:23:40,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 09:23:40,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:23:40,826 INFO L87 Difference]: Start difference. First operand 1978 states and 7870 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:44,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:23:44,550 INFO L93 Difference]: Finished difference Result 1988 states and 7830 transitions. [2022-12-14 09:23:44,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 09:23:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:23:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:23:44,557 INFO L225 Difference]: With dead ends: 1988 [2022-12-14 09:23:44,557 INFO L226 Difference]: Without dead ends: 1988 [2022-12-14 09:23:44,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2022-12-14 09:23:44,558 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 225 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:23:44,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 116 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 09:23:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2022-12-14 09:23:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1968. [2022-12-14 09:23:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1959 states have (on average 3.9816232771822357) internal successors, (7800), 1967 states have internal predecessors, (7800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 7800 transitions. [2022-12-14 09:23:44,591 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 7800 transitions. Word has length 12 [2022-12-14 09:23:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:23:44,591 INFO L495 AbstractCegarLoop]: Abstraction has 1968 states and 7800 transitions. [2022-12-14 09:23:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:23:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 7800 transitions. [2022-12-14 09:23:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:23:44,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:23:44,592 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:23:44,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-14 09:23:44,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-12-14 09:23:45,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-12-14 09:23:45,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:23:45,194 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:23:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:23:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 866727953, now seen corresponding path program 2 times [2022-12-14 09:23:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:23:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446824083] [2022-12-14 09:23:45,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:23:45,197 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 09:23:45,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:23:45,198 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:23:45,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-14 09:23:45,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:23:45,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:23:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:45,447 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:45,447 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 09:23:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:45,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:47,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:23:47,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446824083] [2022-12-14 09:23:47,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446824083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:47,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1259439895] [2022-12-14 09:23:47,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:23:47,199 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:23:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:23:47,200 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:23:47,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-12-14 09:23:47,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:23:47,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:47,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:23:47,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:47,519 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:47,519 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 09:23:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:47,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:48,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1259439895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:48,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752568352] [2022-12-14 09:23:48,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:23:48,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:23:48,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:23:48,728 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:23:48,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 09:23:48,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:23:48,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:23:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:23:48,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:23:48,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:23:48,936 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 09:23:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:49,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:23:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:23:50,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752568352] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:23:50,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:23:50,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 18 [2022-12-14 09:23:50,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042586940] [2022-12-14 09:23:50,461 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:23:50,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 09:23:50,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:23:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 09:23:50,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:23:50,462 INFO L87 Difference]: Start difference. First operand 1968 states and 7800 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:10,947 INFO L93 Difference]: Finished difference Result 3360 states and 13768 transitions. [2022-12-14 09:24:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 09:24:10,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:24:10,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:10,968 INFO L225 Difference]: With dead ends: 3360 [2022-12-14 09:24:10,968 INFO L226 Difference]: Without dead ends: 3360 [2022-12-14 09:24:10,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 09:24:10,969 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 710 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:10,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 106 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-12-14 09:24:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2022-12-14 09:24:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2580. [2022-12-14 09:24:11,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 2571 states have (on average 4.239595488136912) internal successors, (10900), 2579 states have internal predecessors, (10900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:11,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 10900 transitions. [2022-12-14 09:24:11,037 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 10900 transitions. Word has length 12 [2022-12-14 09:24:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:11,037 INFO L495 AbstractCegarLoop]: Abstraction has 2580 states and 10900 transitions. [2022-12-14 09:24:11,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 10900 transitions. [2022-12-14 09:24:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 09:24:11,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:11,038 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 09:24:11,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:11,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-12-14 09:24:11,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-14 09:24:11,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:11,640 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:24:11,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1380381786, now seen corresponding path program 3 times [2022-12-14 09:24:11,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:11,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435117167] [2022-12-14 09:24:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:11,642 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 09:24:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:11,645 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:24:11,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 09:24:11,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:24:11,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:24:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:12,054 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:24:12,054 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 09:24:12,414 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 09:24:12,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:15,117 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 09:24:15,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435117167] [2022-12-14 09:24:15,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435117167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:15,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [104404920] [2022-12-14 09:24:15,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:15,117 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:15,118 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:15,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 09:24:15,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:24:15,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:15,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:24:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:15,868 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:24:15,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 09:24:16,058 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 09:24:16,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:20,455 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 09:24:20,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [104404920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346283609] [2022-12-14 09:24:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:20,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:20,457 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:20,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 09:24:21,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 09:24:21,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:24:21,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:21,612 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:24:21,612 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 09:24:21,723 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 09:24:21,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:25,089 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 09:24:25,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346283609] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:25,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:25,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-12-14 09:24:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402226904] [2022-12-14 09:24:25,090 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 09:24:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 09:24:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1402, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 09:24:25,092 INFO L87 Difference]: Start difference. First operand 2580 states and 10900 transitions. Second operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:44,379 INFO L93 Difference]: Finished difference Result 15206 states and 63466 transitions. [2022-12-14 09:24:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:24:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 09:24:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:44,430 INFO L225 Difference]: With dead ends: 15206 [2022-12-14 09:24:44,431 INFO L226 Difference]: Without dead ends: 15206 [2022-12-14 09:24:44,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=841, Invalid=2021, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 09:24:44,432 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5740 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 2851 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5740 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:44,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5740 Valid, 378 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2851 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-12-14 09:24:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15206 states. [2022-12-14 09:24:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15206 to 2592. [2022-12-14 09:24:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2583 states have (on average 4.229190863337204) internal successors, (10924), 2591 states have internal predecessors, (10924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 10924 transitions. [2022-12-14 09:24:44,629 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 10924 transitions. Word has length 12 [2022-12-14 09:24:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:44,630 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 10924 transitions. [2022-12-14 09:24:44,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 10924 transitions. [2022-12-14 09:24:44,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 09:24:44,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:44,632 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:44,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-12-14 09:24:44,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 09:24:45,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 09:24:45,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:24:45,235 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:24:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1754350144, now seen corresponding path program 2 times [2022-12-14 09:24:45,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:45,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563591247] [2022-12-14 09:24:45,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:24:45,238 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 09:24:45,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:45,239 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:24:45,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 09:24:45,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 09:24:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:24:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:45,473 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:24:45,473 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 09:24:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 09:24:45,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:24:45,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:45,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563591247] [2022-12-14 09:24:45,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563591247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:24:45,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:24:45,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:24:45,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301806800] [2022-12-14 09:24:45,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:24:45,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:24:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:45,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:24:45,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:24:45,666 INFO L87 Difference]: Start difference. First operand 2592 states and 10924 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:24:45,953 INFO L93 Difference]: Finished difference Result 2738 states and 11106 transitions. [2022-12-14 09:24:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:24:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 09:24:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:24:45,960 INFO L225 Difference]: With dead ends: 2738 [2022-12-14 09:24:45,960 INFO L226 Difference]: Without dead ends: 2738 [2022-12-14 09:24:45,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:24:45,961 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:24:45,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:24:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2738 states. [2022-12-14 09:24:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2738 to 2652. [2022-12-14 09:24:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2643 states have (on average 4.104426787741203) internal successors, (10848), 2651 states have internal predecessors, (10848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 10848 transitions. [2022-12-14 09:24:46,017 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 10848 transitions. Word has length 13 [2022-12-14 09:24:46,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:24:46,018 INFO L495 AbstractCegarLoop]: Abstraction has 2652 states and 10848 transitions. [2022-12-14 09:24:46,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:24:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 10848 transitions. [2022-12-14 09:24:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:24:46,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:24:46,019 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:24:46,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 09:24:46,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:24:46,221 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:24:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:24:46,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1539066539, now seen corresponding path program 3 times [2022-12-14 09:24:46,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:24:46,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770558901] [2022-12-14 09:24:46,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:46,224 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 09:24:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:24:46,227 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:24:46,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:24:46,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:24:46,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 09:24:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:46,519 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:24:46,519 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 09:24:46,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-14 09:24:46,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:24:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:47,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:47,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:24:47,602 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:24:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:49,238 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:24:49,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770558901] [2022-12-14 09:24:49,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770558901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:49,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [314641350] [2022-12-14 09:24:49,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:49,239 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:24:49,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:24:49,239 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:24:49,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 09:24:49,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:24:49,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:24:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:49,633 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:24:49,634 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 09:24:50,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-12-14 09:24:50,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:24:50,033 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:24:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:50,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:24:50,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 11 [2022-12-14 09:24:50,126 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:24:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:52,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [314641350] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:52,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370662713] [2022-12-14 09:24:52,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:24:52,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:24:52,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:24:52,906 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:24:52,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 09:24:53,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:24:53,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:24:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:24:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:24:53,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:24:53,203 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 09:24:53,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:24:53,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-12-14 09:24:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:53,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:24:54,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:24:54,218 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:24:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:24:57,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370662713] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:24:57,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:24:57,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 18 [2022-12-14 09:24:57,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485484959] [2022-12-14 09:24:57,018 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:24:57,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 09:24:57,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:24:57,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 09:24:57,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:24:57,019 INFO L87 Difference]: Start difference. First operand 2652 states and 10848 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:00,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 09:25:02,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 09:25:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:25:03,426 INFO L93 Difference]: Finished difference Result 2892 states and 11654 transitions. [2022-12-14 09:25:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:25:03,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:25:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:25:03,436 INFO L225 Difference]: With dead ends: 2892 [2022-12-14 09:25:03,436 INFO L226 Difference]: Without dead ends: 2892 [2022-12-14 09:25:03,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:25:03,437 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 245 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:25:03,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 34 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 290 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-12-14 09:25:03,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2022-12-14 09:25:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 1772. [2022-12-14 09:25:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1767 states have (on average 3.912846632710809) internal successors, (6914), 1771 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6914 transitions. [2022-12-14 09:25:03,482 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6914 transitions. Word has length 14 [2022-12-14 09:25:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:25:03,482 INFO L495 AbstractCegarLoop]: Abstraction has 1772 states and 6914 transitions. [2022-12-14 09:25:03,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6914 transitions. [2022-12-14 09:25:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:25:03,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:25:03,483 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:25:03,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 09:25:03,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 09:25:03,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 09:25:04,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:04,085 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:25:04,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:25:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash 680243521, now seen corresponding path program 2 times [2022-12-14 09:25:04,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:25:04,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1663378535] [2022-12-14 09:25:04,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:25:04,089 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 09:25:04,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:25:04,091 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:25:04,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:25:04,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:25:04,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 09:25:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:04,363 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:25:04,363 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 09:25:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:04,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:06,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:25:06,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1663378535] [2022-12-14 09:25:06,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1663378535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:06,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047019426] [2022-12-14 09:25:06,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:25:06,435 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:25:06,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:25:06,435 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:25:06,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 09:25:06,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:25:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:25:06,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:25:07,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:25:08,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047019426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356714934] [2022-12-14 09:25:08,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 09:25:08,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:08,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:25:08,382 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:25:08,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 09:25:08,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 09:25:08,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:08,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:25:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:08,591 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:25:08,591 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 09:25:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:09,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:09,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:25:09,376 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:25:09,377 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:25:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:11,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356714934] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:11,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:25:11,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 9, 10, 10] total 56 [2022-12-14 09:25:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678520111] [2022-12-14 09:25:11,535 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:25:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 09:25:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:25:11,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 09:25:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2849, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 09:25:11,536 INFO L87 Difference]: Start difference. First operand 1772 states and 6914 transitions. Second operand has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:56,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:25:56,842 INFO L93 Difference]: Finished difference Result 3367 states and 12019 transitions. [2022-12-14 09:25:56,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 09:25:56,844 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:25:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:25:56,851 INFO L225 Difference]: With dead ends: 3367 [2022-12-14 09:25:56,851 INFO L226 Difference]: Without dead ends: 3367 [2022-12-14 09:25:56,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=1332, Invalid=7224, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 09:25:56,853 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2154 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 5575 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2154 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 5637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 5575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:25:56,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2154 Valid, 435 Invalid, 5637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 5575 Invalid, 0 Unknown, 0 Unchecked, 25.7s Time] [2022-12-14 09:25:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2022-12-14 09:25:56,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 1863. [2022-12-14 09:25:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1858 states have (on average 3.84983853606028) internal successors, (7153), 1862 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 7153 transitions. [2022-12-14 09:25:56,893 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 7153 transitions. Word has length 14 [2022-12-14 09:25:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:25:56,893 INFO L495 AbstractCegarLoop]: Abstraction has 1863 states and 7153 transitions. [2022-12-14 09:25:56,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 56 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:25:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 7153 transitions. [2022-12-14 09:25:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:25:56,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:25:56,894 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2022-12-14 09:25:56,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:25:57,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 09:25:57,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 09:25:57,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:25:57,497 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:25:57,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:25:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2051549032, now seen corresponding path program 3 times [2022-12-14 09:25:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:25:57,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657912057] [2022-12-14 09:25:57,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:25:57,499 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 09:25:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:25:57,500 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:25:57,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:25:57,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:25:57,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:25:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:25:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:25:57,980 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:25:57,980 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 09:25:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:58,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:25:58,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:25:58,482 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:25:58,484 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:25:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:25:59,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:25:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657912057] [2022-12-14 09:25:59,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657912057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:25:59,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [32624269] [2022-12-14 09:25:59,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:25:59,930 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:25:59,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:25:59,931 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:25:59,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 09:26:00,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:26:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:26:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:26:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:26:00,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:26:00,935 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 09:26:01,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:26:01,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:26:01,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:26:01,107 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:26:01,109 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:26:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:26:01,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [32624269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:26:01,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606143509] [2022-12-14 09:26:01,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:26:01,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:26:01,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:26:01,879 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:26:01,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 09:26:02,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:26:02,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:26:02,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:26:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:26:02,318 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:26:02,318 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 09:26:02,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-12-14 09:26:02,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:26:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:26:02,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:26:02,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:26:02,849 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:26:02,851 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:26:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:26:06,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606143509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:26:06,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:26:06,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 42 [2022-12-14 09:26:06,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660497959] [2022-12-14 09:26:06,739 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:26:06,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 09:26:06,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:26:06,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 09:26:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:26:06,740 INFO L87 Difference]: Start difference. First operand 1863 states and 7153 transitions. Second operand has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:01,867 INFO L93 Difference]: Finished difference Result 6001 states and 22451 transitions. [2022-12-14 09:27:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 09:27:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:27:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:01,880 INFO L225 Difference]: With dead ends: 6001 [2022-12-14 09:27:01,880 INFO L226 Difference]: Without dead ends: 6001 [2022-12-14 09:27:01,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=1066, Invalid=4786, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 09:27:01,881 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2339 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 5507 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 5553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:01,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2339 Valid, 801 Invalid, 5553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5507 Invalid, 0 Unknown, 0 Unchecked, 31.1s Time] [2022-12-14 09:27:01,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2022-12-14 09:27:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 2967. [2022-12-14 09:27:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2962 states have (on average 4.1333558406482105) internal successors, (12243), 2966 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 12243 transitions. [2022-12-14 09:27:01,939 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 12243 transitions. Word has length 14 [2022-12-14 09:27:01,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:01,940 INFO L495 AbstractCegarLoop]: Abstraction has 2967 states and 12243 transitions. [2022-12-14 09:27:01,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 12243 transitions. [2022-12-14 09:27:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 09:27:01,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:01,941 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-12-14 09:27:01,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 09:27:02,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 09:27:02,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:27:02,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:27:02,544 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:27:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1287168435, now seen corresponding path program 4 times [2022-12-14 09:27:02,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:27:02,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800697167] [2022-12-14 09:27:02,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:27:02,546 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 09:27:02,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:27:02,547 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:27:02,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-14 09:27:02,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:27:02,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 09:27:02,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:02,818 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:27:02,818 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 09:27:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:03,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:05,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:05,352 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:27:05,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800697167] [2022-12-14 09:27:05,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800697167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:05,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [147402767] [2022-12-14 09:27:05,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:27:05,352 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:27:05,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:27:05,353 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:27:05,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 09:27:05,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:27:05,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:27:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:06,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:08,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [147402767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:08,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603192125] [2022-12-14 09:27:08,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:27:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:08,375 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:08,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 09:27:08,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:27:08,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:08,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 09:27:08,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:08,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:27:08,631 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 09:27:09,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:27:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:27:09,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:10,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:27:10,026 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:27:10,027 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:27:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:27:13,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603192125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:13,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:27:13,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 8, 8] total 64 [2022-12-14 09:27:13,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926364119] [2022-12-14 09:27:13,082 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:13,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-14 09:27:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:27:13,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-14 09:27:13,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=3718, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 09:27:13,084 INFO L87 Difference]: Start difference. First operand 2967 states and 12243 transitions. Second operand has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:55,313 INFO L93 Difference]: Finished difference Result 5641 states and 21135 transitions. [2022-12-14 09:27:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 09:27:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 09:27:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:55,327 INFO L225 Difference]: With dead ends: 5641 [2022-12-14 09:27:55,327 INFO L226 Difference]: Without dead ends: 5641 [2022-12-14 09:27:55,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3735 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=2615, Invalid=12391, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 09:27:55,329 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 5021 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 9804 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5021 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 9891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 9804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:55,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5021 Valid, 1670 Invalid, 9891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 9804 Invalid, 0 Unknown, 0 Unchecked, 14.9s Time] [2022-12-14 09:27:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2022-12-14 09:27:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 3484. [2022-12-14 09:27:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3479 states have (on average 4.021845357861454) internal successors, (13992), 3483 states have internal predecessors, (13992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 13992 transitions. [2022-12-14 09:27:55,393 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 13992 transitions. Word has length 15 [2022-12-14 09:27:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:55,394 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 13992 transitions. [2022-12-14 09:27:55,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 65 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 13992 transitions. [2022-12-14 09:27:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 09:27:55,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:55,396 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:55,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-12-14 09:27:55,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 09:27:55,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-12-14 09:27:55,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:27:55,998 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:27:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:55,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1833677378, now seen corresponding path program 3 times [2022-12-14 09:27:56,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:27:56,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526586055] [2022-12-14 09:27:56,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:27:56,000 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 09:27:56,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:27:56,003 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:27:56,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 09:27:56,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:27:56,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:56,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:27:56,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:56,478 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:27:56,478 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 09:27:56,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:27:56,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 90 [2022-12-14 09:27:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:57,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:57,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:27:57,413 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:28:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:00,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:28:00,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526586055] [2022-12-14 09:28:00,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526586055] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:28:00,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1203497063] [2022-12-14 09:28:00,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:28:00,199 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:28:00,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:28:00,200 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:28:00,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 09:28:01,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:28:01,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:28:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 09:28:01,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:28:01,299 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:28:01,299 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 09:28:02,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 09:28:02,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:02,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 90 [2022-12-14 09:28:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:02,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:28:02,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:28:02,321 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:28:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:04,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1203497063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:28:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398456748] [2022-12-14 09:28:04,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:28:04,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:28:04,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:28:04,455 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:28:04,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 09:28:04,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 09:28:04,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:28:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 09:28:04,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:28:04,916 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:28:04,917 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 09:28:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:05,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:28:05,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:28:05,543 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:28:05,545 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 09:28:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:09,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398456748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:28:09,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:28:09,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 49 [2022-12-14 09:28:09,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105334072] [2022-12-14 09:28:09,421 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:28:09,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-14 09:28:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:28:09,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-14 09:28:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2140, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 09:28:09,422 INFO L87 Difference]: Start difference. First operand 3484 states and 13992 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:57,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:28:57,854 INFO L93 Difference]: Finished difference Result 8447 states and 31830 transitions. [2022-12-14 09:28:57,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 09:28:57,858 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 09:28:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:28:57,874 INFO L225 Difference]: With dead ends: 8447 [2022-12-14 09:28:57,874 INFO L226 Difference]: Without dead ends: 8447 [2022-12-14 09:28:57,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=1348, Invalid=7208, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 09:28:57,875 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2550 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 5257 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2550 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 5332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 5257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:28:57,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2550 Valid, 751 Invalid, 5332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 5257 Invalid, 0 Unknown, 0 Unchecked, 22.2s Time] [2022-12-14 09:28:57,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2022-12-14 09:28:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 4661. [2022-12-14 09:28:57,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4656 states have (on average 4.198238831615121) internal successors, (19547), 4660 states have internal predecessors, (19547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 19547 transitions. [2022-12-14 09:28:57,967 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 19547 transitions. Word has length 16 [2022-12-14 09:28:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:28:57,967 INFO L495 AbstractCegarLoop]: Abstraction has 4661 states and 19547 transitions. [2022-12-14 09:28:57,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 19547 transitions. [2022-12-14 09:28:57,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 09:28:57,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:28:57,969 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:28:57,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 09:28:58,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-12-14 09:28:58,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-12-14 09:28:58,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 09:28:58,571 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:28:58,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:28:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1964023479, now seen corresponding path program 4 times [2022-12-14 09:28:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:28:58,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332364488] [2022-12-14 09:28:58,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:28:58,574 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 09:28:58,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:28:58,576 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:28:58,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-12-14 09:28:58,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:28:58,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:28:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:28:58,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:28:58,873 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 09:28:58,873 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 09:28:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:59,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:02,218 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:29:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332364488] [2022-12-14 09:29:02,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332364488] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:02,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263402136] [2022-12-14 09:29:02,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:29:02,219 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:29:02,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:29:02,220 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:29:02,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-12-14 09:29:02,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:29:02,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:29:02,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 09:29:02,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:03,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:06,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263402136] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:06,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530351221] [2022-12-14 09:29:06,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:29:06,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:29:06,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:29:06,373 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:29:06,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 09:29:06,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:29:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:29:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 09:29:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:29:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:07,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:29:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:29:09,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530351221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:29:09,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 09:29:09,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 63 [2022-12-14 09:29:09,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291186603] [2022-12-14 09:29:09,329 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 09:29:09,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-14 09:29:09,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 09:29:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-14 09:29:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3728, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 09:29:09,331 INFO L87 Difference]: Start difference. First operand 4661 states and 19547 transitions. Second operand has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:30:39,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:30:39,933 INFO L93 Difference]: Finished difference Result 11490 states and 43996 transitions. [2022-12-14 09:30:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-14 09:30:39,935 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 09:30:39,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:30:39,961 INFO L225 Difference]: With dead ends: 11490 [2022-12-14 09:30:39,961 INFO L226 Difference]: Without dead ends: 11490 [2022-12-14 09:30:39,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=3086, Invalid=15820, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 09:30:39,963 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 9205 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 13202 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9205 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 13423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 13202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:30:39,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9205 Valid, 1034 Invalid, 13423 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [221 Valid, 13202 Invalid, 0 Unknown, 0 Unchecked, 44.8s Time] [2022-12-14 09:30:39,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2022-12-14 09:30:40,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 5294. [2022-12-14 09:30:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5294 states, 5289 states have (on average 4.310077519379845) internal successors, (22796), 5293 states have internal predecessors, (22796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:30:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5294 states to 5294 states and 22796 transitions. [2022-12-14 09:30:40,078 INFO L78 Accepts]: Start accepts. Automaton has 5294 states and 22796 transitions. Word has length 17 [2022-12-14 09:30:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:30:40,078 INFO L495 AbstractCegarLoop]: Abstraction has 5294 states and 22796 transitions. [2022-12-14 09:30:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.265625) internal successors, (81), 64 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:30:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 5294 states and 22796 transitions. [2022-12-14 09:30:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:30:40,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:30:40,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:30:40,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-12-14 09:30:40,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 09:30:40,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-12-14 09:30:40,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:30:40,684 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 09:30:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:30:40,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1455629767, now seen corresponding path program 1 times [2022-12-14 09:30:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 09:30:40,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305888819] [2022-12-14 09:30:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:30:40,686 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 09:30:40,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 09:30:40,687 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -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 09:30:40,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-12-14 09:30:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:30:40,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 09:30:40,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:30:40,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 09:30:41,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:30:41,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:41,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 09:30:41,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 09:30:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:30:42,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:30:42,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:30:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:30:42,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:30:42,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 146 [2022-12-14 09:30:42,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 09:30:42,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 130 [2022-12-14 09:30:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:30:42,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:30:44,274 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse14 (bvmul (_ bv4 32) c_~M~0))) (let ((.cse9 (bvadd .cse14 c_~A~0.offset)) (.cse15 (bvadd .cse14 (_ bv4 32) c_~A~0.offset))) (let ((.cse0 (not (= (_ bv0 1) (bvadd (select |c_#valid| c_~A~0.base) (_ bv1 1))))) (.cse1 (not (bvule .cse15 (select |c_#length| c_~A~0.base)))) (.cse4 (not (bvule .cse9 .cse15))) (.cse3 (= c_~max1~0 c_~max2~0)) (.cse6 (bvadd .cse14 (_ bv3 32) c_~A~0.offset)) (.cse7 (bvadd .cse14 (_ bv2 32) c_~A~0.offset)) (.cse8 (bvadd .cse14 c_~A~0.offset (_ bv1 32)))) (and (or .cse0 .cse1 (let ((.cse2 (bvslt c_~max2~0 c_~max3~0))) (and (or .cse2 .cse3) (or (= c_~max3~0 c_~max1~0) (not .cse2)))) .cse4 (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8)))) (bvslt c_~max3~0 (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse5 .cse6) (select .cse5 .cse7)) (select .cse5 .cse8)) (select .cse5 .cse9)))))) (or .cse0 .cse1 .cse4 (and (or (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse10 (let ((.cse11 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse11 .cse6) (select .cse11 .cse7)) (select .cse11 .cse8)) (select .cse11 .cse9))))) (or (not (bvslt c_~max3~0 .cse10)) (bvslt c_~max2~0 .cse10)))) .cse3) (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse12 (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse13 .cse6) (select .cse13 .cse7)) (select .cse13 .cse8)) (select .cse13 .cse9))))) (or (not (bvslt c_~max3~0 .cse12)) (not (bvslt c_~max2~0 .cse12)) (= .cse12 c_~max1~0)))))))))) is different from false [2022-12-14 09:30:44,566 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse15 (bvmul (_ bv4 32) c_~M~0))) (let ((.cse9 (bvadd .cse15 c_~A~0.offset)) (.cse14 (bvadd .cse15 (_ bv4 32) c_~A~0.offset))) (let ((.cse6 (bvadd .cse15 (_ bv3 32) c_~A~0.offset)) (.cse7 (bvadd .cse15 (_ bv2 32) c_~A~0.offset)) (.cse8 (bvadd .cse15 c_~A~0.offset (_ bv1 32))) (.cse3 (= c_~max1~0 c_~max2~0)) (.cse0 (not (= (_ bv0 1) (bvadd (select |c_#valid| c_~A~0.base) (_ bv1 1))))) (.cse1 (not (bvule .cse14 (select |c_#length| c_~A~0.base)))) (.cse4 (not (bvule .cse9 .cse14)))) (and (or .cse0 .cse1 (let ((.cse2 (bvslt c_~max2~0 c_~max3~0))) (and (or .cse2 .cse3) (or (= c_~max3~0 c_~max1~0) (not .cse2)))) .cse4 (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2429 (Array (_ BitVec 32) (_ BitVec 8)))) (bvslt c_~max3~0 (let ((.cse5 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2429) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse5 .cse6) (select .cse5 .cse7)) (select .cse5 .cse8)) (select .cse5 .cse9)))))) (or (and (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2429 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse10 (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2429) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse11 .cse6) (select .cse11 .cse7)) (select .cse11 .cse8)) (select .cse11 .cse9))))) (or (= .cse10 c_~max1~0) (not (bvslt c_~max3~0 .cse10)) (not (bvslt c_~max2~0 .cse10))))) (or (forall ((v_ArrVal_2430 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2429 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse12 (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2429) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2430) c_~A~0.base))) (concat (concat (concat (select .cse13 .cse6) (select .cse13 .cse7)) (select .cse13 .cse8)) (select .cse13 .cse9))))) (or (not (bvslt c_~max3~0 .cse12)) (bvslt c_~max2~0 .cse12)))) .cse3)) .cse0 .cse1 .cse4))))) is different from false [2022-12-14 09:30:45,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 702 [2022-12-14 09:30:45,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 702 treesize of output 694 [2022-12-14 09:30:49,236 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-12-14 09:30:49,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 29172 treesize of output 25855 [2022-12-14 09:30:49,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:49,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25758 treesize of output 24894 [2022-12-14 09:30:49,902 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-12-14 09:30:49,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 24894 treesize of output 23867 [2022-12-14 09:30:50,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:50,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 23770 treesize of output 22042 [2022-12-14 09:30:50,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:50,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22042 treesize of output 21826 [2022-12-14 09:30:50,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:50,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21826 treesize of output 21718 [2022-12-14 09:30:50,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:50,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21718 treesize of output 21610 [2022-12-14 09:30:50,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:50,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21610 treesize of output 21394 [2022-12-14 09:30:50,839 INFO L321 Elim1Store]: treesize reduction 156, result has 9.8 percent of original size [2022-12-14 09:30:50,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 21394 treesize of output 19993 [2022-12-14 09:30:50,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:51,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19976 treesize of output 18680 [2022-12-14 09:30:51,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:51,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 18680 treesize of output 18032 [2022-12-14 09:30:51,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:51,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 18032 treesize of output 14576 [2022-12-14 09:30:51,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:51,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 14576 treesize of output 12848 [2022-12-14 09:30:51,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:51,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 12848 treesize of output 12416 [2022-12-14 09:30:51,455 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:30:51,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 12416 treesize of output 11552 [2022-12-14 09:34:15,707 WARN L233 SmtUtils]: Spent 45.35s on a formula simplification. DAG size of input: 804 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:34:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:34:15,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 09:34:15,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305888819] [2022-12-14 09:34:15,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305888819] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:34:15,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047702013] [2022-12-14 09:34:15,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:34:15,977 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 09:34:15,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 09:34:15,978 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 09:34:15,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024a3d1f-2164-4b0c-8949-736e8b574803/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-12-14 09:34:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:34:16,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 09:34:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:34:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:16,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-14 09:34:16,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:34:17,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:17,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 09:34:18,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:18,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2022-12-14 09:34:19,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:19,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:19,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:19,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:19,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:19,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:19,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:19,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:19,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:19,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 284 treesize of output 146 [2022-12-14 09:34:19,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-12-14 09:34:19,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 130 [2022-12-14 09:34:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:34:19,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:34:23,992 WARN L837 $PredicateComparison]: unable to prove that (or (bvslt (_ bv0 32) c_~M~0) (let ((.cse15 (bvmul (_ bv4 32) c_~M~0))) (let ((.cse4 (bvadd .cse15 c_~A~0.offset)) (.cse14 (bvadd .cse15 (_ bv4 32) c_~A~0.offset))) (let ((.cse8 (= c_~max1~0 c_~max2~0)) (.cse1 (bvadd .cse15 (_ bv3 32) c_~A~0.offset)) (.cse2 (bvadd .cse15 (_ bv2 32) c_~A~0.offset)) (.cse3 (bvadd .cse15 c_~A~0.offset (_ bv1 32))) (.cse5 (not (= (_ bv0 1) (bvadd (select |c_#valid| c_~A~0.base) (_ bv1 1))))) (.cse6 (not (bvule .cse14 (select |c_#length| c_~A~0.base)))) (.cse9 (not (bvule .cse4 .cse14)))) (and (or (forall ((v_ArrVal_2472 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2471 (Array (_ BitVec 32) (_ BitVec 8)))) (bvslt c_~max3~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2471) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2472) c_~A~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))))) .cse5 .cse6 (let ((.cse7 (bvslt c_~max2~0 c_~max3~0))) (and (or .cse7 .cse8) (or (= c_~max3~0 c_~max1~0) (not .cse7)))) .cse9) (or (and (or (forall ((v_ArrVal_2472 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2471 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse10 (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2471) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2472) c_~A~0.base))) (concat (concat (concat (select .cse11 .cse1) (select .cse11 .cse2)) (select .cse11 .cse3)) (select .cse11 .cse4))))) (or (bvslt c_~max2~0 .cse10) (not (bvslt c_~max3~0 .cse10))))) .cse8) (forall ((v_ArrVal_2472 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2471 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse12 (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2471) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2472) c_~A~0.base))) (concat (concat (concat (select .cse13 .cse1) (select .cse13 .cse2)) (select .cse13 .cse3)) (select .cse13 .cse4))))) (or (not (bvslt c_~max3~0 .cse12)) (= .cse12 c_~max1~0) (not (bvslt c_~max2~0 .cse12)))))) .cse5 .cse6 .cse9))))) (not (bvslt c_~M~0 c_~N~0))) is different from false [2022-12-14 09:34:24,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 710 treesize of output 702 [2022-12-14 09:34:24,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 702 treesize of output 694 [2022-12-14 09:34:46,032 WARN L233 SmtUtils]: Spent 15.09s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:34:46,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:34:46,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 600 treesize of output 219 [2022-12-14 09:34:46,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:34:46,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 495 treesize of output 432 [2022-12-14 09:34:46,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 223 [2022-12-14 09:34:46,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 169 [2022-12-14 09:34:46,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:46,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 114 [2022-12-14 09:34:48,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:34:48,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 825 treesize of output 300 [2022-12-14 09:34:48,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:34:48,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 6189 treesize of output 5601 [2022-12-14 09:34:48,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 5500 treesize of output 4636 [2022-12-14 09:34:48,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 4636 treesize of output 2908 [2022-12-14 09:34:48,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:34:48,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:34:48,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 2979 treesize of output 2519 [2022-12-14 09:36:23,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:23,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 600 treesize of output 219 [2022-12-14 09:36:23,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:23,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:23,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:23,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:23,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:23,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:23,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:23,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:23,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:23,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 871 treesize of output 773 [2022-12-14 09:36:23,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 672 treesize of output 456 [2022-12-14 09:36:23,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 456 treesize of output 348 [2022-12-14 09:36:23,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:24,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:24,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:24,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:24,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:24,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:24,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:24,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:24,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:24,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:24,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 419 treesize of output 337 [2022-12-14 09:36:27,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:27,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 1047 treesize of output 378 [2022-12-14 09:36:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:27,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 15268 treesize of output 12734 [2022-12-14 09:36:27,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 12514 treesize of output 10786 [2022-12-14 09:36:27,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 10830 treesize of output 8928 [2022-12-14 09:36:27,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 8858 treesize of output 5402