./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-8393723 [2022-11-18 19:58:40,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:58:40,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:58:40,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:58:40,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:58:40,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:58:40,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:58:40,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:58:40,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:58:40,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:58:40,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:58:40,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:58:40,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:58:40,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:58:40,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:58:40,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:58:40,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:58:40,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:58:40,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:58:40,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:58:40,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:58:40,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:58:40,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:58:40,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:58:40,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:58:40,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:58:40,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:58:40,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:58:40,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:58:40,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:58:40,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:58:40,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:58:40,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:58:40,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:58:40,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:58:40,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:58:40,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:58:40,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:58:40,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:58:40,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:58:40,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:58:40,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 19:58:40,969 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:58:40,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:58:40,970 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:58:40,970 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:58:40,974 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:58:40,974 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:58:40,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:58:40,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:58:40,975 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:58:40,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:58:40,977 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:58:40,977 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:58:40,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:58:40,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:58:40,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:58:40,978 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 19:58:40,978 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 19:58:40,979 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 19:58:40,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:58:40,979 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 19:58:40,979 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:58:40,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:58:40,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:58:40,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:58:40,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:58:40,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:58:40,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:58:40,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:58:40,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:58:40,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:58:40,983 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_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-18 19:58:41,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:58:41,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:58:41,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:58:41,357 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:58:41,357 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:58:41,359 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-18 19:58:41,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/a33625f9e/4208b2d1d33e4827b03b77b14fa77f38/FLAG5179ac03b [2022-11-18 19:58:41,953 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:58:41,954 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-18 19:58:41,962 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/a33625f9e/4208b2d1d33e4827b03b77b14fa77f38/FLAG5179ac03b [2022-11-18 19:58:42,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/a33625f9e/4208b2d1d33e4827b03b77b14fa77f38 [2022-11-18 19:58:42,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:58:42,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:58:42,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:58:42,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:58:42,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:58:42,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:58:42" (1/1) ... [2022-11-18 19:58:42,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1157a373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:42, skipping insertion in model container [2022-11-18 19:58:42,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:58:42" (1/1) ... [2022-11-18 19:58:42,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:58:42,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:58:42,664 WARN L234 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_55cee756-76df-4916-bbe1-89754b8f9b66/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-18 19:58:42,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:58:42,697 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) [2022-11-18 19:58:42,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@68cc4378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:42, skipping insertion in model container [2022-11-18 19:58:42,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:58:42,700 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 19:58:42,703 INFO L158 Benchmark]: Toolchain (without parser) took 383.44ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 105.5MB in the end (delta: -7.9MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2022-11-18 19:58:42,704 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory was 41.3MB in the beginning and 41.3MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 19:58:42,706 INFO L158 Benchmark]: CACSL2BoogieTranslator took 377.10ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 105.5MB in the end (delta: -7.9MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2022-11-18 19:58:42,708 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory was 41.3MB in the beginning and 41.3MB in the end (delta: 45.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 377.10ms. Allocated memory is still 127.9MB. Free memory was 97.7MB in the beginning and 105.5MB in the end (delta: -7.9MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-8393723 [2022-11-18 19:58:44,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:58:44,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:58:44,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:58:44,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:58:44,894 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:58:44,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:58:44,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:58:44,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:58:44,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:58:44,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:58:44,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:58:44,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:58:44,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:58:44,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:58:44,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:58:44,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:58:44,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:58:44,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:58:44,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:58:44,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:58:44,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:58:44,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:58:44,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:58:44,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:58:44,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:58:44,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:58:44,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:58:44,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:58:44,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:58:44,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:58:44,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:58:44,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:58:44,984 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:58:44,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:58:44,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:58:44,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:58:44,987 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:58:44,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:58:44,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:58:44,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:58:44,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-18 19:58:45,038 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:58:45,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:58:45,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:58:45,040 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:58:45,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:58:45,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:58:45,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:58:45,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:58:45,043 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:58:45,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:58:45,044 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:58:45,044 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:58:45,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:58:45,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:58:45,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:58:45,046 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 19:58:45,046 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 19:58:45,046 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 19:58:45,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:58:45,047 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 19:58:45,047 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 19:58:45,047 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 19:58:45,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:58:45,047 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:58:45,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:58:45,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:58:45,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:58:45,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:58:45,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:58:45,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:58:45,049 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 19:58:45,050 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 19:58:45,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 19:58:45,050 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_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-18 19:58:45,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:58:45,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:58:45,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:58:45,500 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:58:45,503 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:58:45,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-18 19:58:45,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/1e35ac151/aa8a96096f0642098574d1dd3e8d840f/FLAG35463bc4f [2022-11-18 19:58:46,064 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:58:46,069 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-18 19:58:46,078 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/1e35ac151/aa8a96096f0642098574d1dd3e8d840f/FLAG35463bc4f [2022-11-18 19:58:46,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/data/1e35ac151/aa8a96096f0642098574d1dd3e8d840f [2022-11-18 19:58:46,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:58:46,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:58:46,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:58:46,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:58:46,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:58:46,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78064c87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46, skipping insertion in model container [2022-11-18 19:58:46,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:58:46,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:58:46,752 WARN L234 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_55cee756-76df-4916-bbe1-89754b8f9b66/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-18 19:58:46,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:58:46,808 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 19:58:46,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:58:46,839 WARN L234 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_55cee756-76df-4916-bbe1-89754b8f9b66/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-18 19:58:46,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:58:46,848 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:58:46,872 WARN L234 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_55cee756-76df-4916-bbe1-89754b8f9b66/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-18 19:58:46,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:58:46,892 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:58:46,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46 WrapperNode [2022-11-18 19:58:46,893 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:58:46,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:58:46,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:58:46,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:58:46,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,940 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 186 [2022-11-18 19:58:46,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:58:46,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:58:46,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:58:46,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:58:46,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:58:46,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:58:46,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:58:46,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:58:46,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (1/1) ... [2022-11-18 19:58:46,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:58:46,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:58:47,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:58:47,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:58:47,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:58:47,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 19:58:47,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:58:47,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 19:58:47,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:58:47,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:58:47,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:58:47,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:58:47,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:58:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:58:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:58:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:58:47,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:58:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:58:47,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 19:58:47,060 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:58:47,219 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:58:47,222 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:58:48,028 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:58:48,173 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:58:48,174 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 19:58:48,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:58:48 BoogieIcfgContainer [2022-11-18 19:58:48,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:58:48,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:58:48,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:58:48,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:58:48,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:58:46" (1/3) ... [2022-11-18 19:58:48,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af5b5b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:58:48, skipping insertion in model container [2022-11-18 19:58:48,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:58:46" (2/3) ... [2022-11-18 19:58:48,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af5b5b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:58:48, skipping insertion in model container [2022-11-18 19:58:48,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:58:48" (3/3) ... [2022-11-18 19:58:48,187 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-11-18 19:58:48,200 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:58:48,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-18 19:58:48,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:58:48,285 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:58:48,321 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 19:58:48,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 204 places, 212 transitions, 440 flow [2022-11-18 19:58:48,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 204 places, 212 transitions, 440 flow [2022-11-18 19:58:48,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 204 places, 212 transitions, 440 flow [2022-11-18 19:58:48,464 INFO L130 PetriNetUnfolder]: 15/210 cut-off events. [2022-11-18 19:58:48,464 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:58:48,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 210 events. 15/210 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 209 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 166. Up to 2 conditions per place. [2022-11-18 19:58:48,475 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2022-11-18 19:59:20,899 INFO L134 LiptonReduction]: Checked pairs total: 3090 [2022-11-18 19:59:20,899 INFO L136 LiptonReduction]: Total number of compositions: 243 [2022-11-18 19:59:20,907 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 50 transitions, 116 flow [2022-11-18 19:59:20,944 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:20,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:59:20,966 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;@18ac8046, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:59:20,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2022-11-18 19:59:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:20,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 19:59:20,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:20,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 19:59:20,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash 28392, now seen corresponding path program 1 times [2022-11-18 19:59:20,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:20,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257196293] [2022-11-18 19:59:20,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:20,992 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 [2022-11-18 19:59:20,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:20,993 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:21,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:21,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 19:59:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:21,232 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-18 19:59:21,233 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-18 19:59:21,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:21,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:21,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:21,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257196293] [2022-11-18 19:59:21,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257196293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:21,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:59:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873026556] [2022-11-18 19:59:21,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:21,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:59:21,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:21,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:59:21,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:21,321 INFO L87 Difference]: Start difference. First operand has 347 states, 233 states have (on average 3.8626609442060085) internal successors, (900), 346 states have internal predecessors, (900), 0 states have call successors, (0), 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) [2022-11-18 19:59:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:21,673 INFO L93 Difference]: Finished difference Result 295 states and 770 transitions. [2022-11-18 19:59:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:59:21,676 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 [2022-11-18 19:59:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:21,688 INFO L225 Difference]: With dead ends: 295 [2022-11-18 19:59:21,689 INFO L226 Difference]: Without dead ends: 295 [2022-11-18 19:59:21,689 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 [2022-11-18 19:59:21,693 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:21,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:59:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-18 19:59:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-11-18 19:59:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 207 states have (on average 3.7198067632850242) internal successors, (770), 294 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 770 transitions. [2022-11-18 19:59:21,756 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 770 transitions. Word has length 2 [2022-11-18 19:59:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:21,757 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 770 transitions. [2022-11-18 19:59:21,757 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) [2022-11-18 19:59:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 770 transitions. [2022-11-18 19:59:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 19:59:21,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:21,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 19:59:21,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:21,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:21,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 28393, now seen corresponding path program 1 times [2022-11-18 19:59:21,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:21,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598400083] [2022-11-18 19:59:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:21,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:21,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:21,972 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:21,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:22,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:59:22,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:22,154 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 19:59:22,155 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 19:59:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:22,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:22,202 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:22,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598400083] [2022-11-18 19:59:22,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598400083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:22,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:22,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:59:22,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260079174] [2022-11-18 19:59:22,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:22,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:59:22,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:59:22,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:22,205 INFO L87 Difference]: Start difference. First operand 295 states and 770 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) [2022-11-18 19:59:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:22,572 INFO L93 Difference]: Finished difference Result 298 states and 774 transitions. [2022-11-18 19:59:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:59:22,573 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 [2022-11-18 19:59:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:22,576 INFO L225 Difference]: With dead ends: 298 [2022-11-18 19:59:22,576 INFO L226 Difference]: Without dead ends: 298 [2022-11-18 19:59:22,576 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 [2022-11-18 19:59:22,578 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:22,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:59:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-18 19:59:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-11-18 19:59:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 209 states have (on average 3.7033492822966507) internal successors, (774), 296 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 774 transitions. [2022-11-18 19:59:22,598 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 774 transitions. Word has length 2 [2022-11-18 19:59:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:22,599 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 774 transitions. [2022-11-18 19:59:22,599 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) [2022-11-18 19:59:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 774 transitions. [2022-11-18 19:59:22,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 19:59:22,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:22,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 19:59:22,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:22,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:22,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:22,813 INFO L85 PathProgramCache]: Analyzing trace with hash 887672, now seen corresponding path program 1 times [2022-11-18 19:59:22,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:22,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157996492] [2022-11-18 19:59:22,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:22,814 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 [2022-11-18 19:59:22,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:22,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:22,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 19:59:22,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:22,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 19:59:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:22,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:22,960 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157996492] [2022-11-18 19:59:22,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157996492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:22,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:22,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:59:22,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763028748] [2022-11-18 19:59:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:22,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:59:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:59:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:22,963 INFO L87 Difference]: Start difference. First operand 297 states and 774 transitions. Second operand has 3 states, 2 states have (on average 1.5) 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) [2022-11-18 19:59:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:23,233 INFO L93 Difference]: Finished difference Result 296 states and 772 transitions. [2022-11-18 19:59:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:59:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2022-11-18 19:59:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:23,237 INFO L225 Difference]: With dead ends: 296 [2022-11-18 19:59:23,237 INFO L226 Difference]: Without dead ends: 296 [2022-11-18 19:59:23,237 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 [2022-11-18 19:59:23,238 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:23,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 19:59:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-11-18 19:59:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-11-18 19:59:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 209 states have (on average 3.6937799043062203) internal successors, (772), 295 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 772 transitions. [2022-11-18 19:59:23,262 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 772 transitions. Word has length 3 [2022-11-18 19:59:23,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:23,262 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 772 transitions. [2022-11-18 19:59:23,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2022-11-18 19:59:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 772 transitions. [2022-11-18 19:59:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 19:59:23,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:23,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 19:59:23,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:23,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:23,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 886504, now seen corresponding path program 1 times [2022-11-18 19:59:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:23,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084063387] [2022-11-18 19:59:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:23,482 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 [2022-11-18 19:59:23,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:23,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:23,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 19:59:23,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:23,654 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 19:59:23,655 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 19:59:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:23,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:23,997 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084063387] [2022-11-18 19:59:23,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2084063387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:23,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:23,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-18 19:59:23,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890110139] [2022-11-18 19:59:23,998 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:23,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:59:23,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:23,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:59:23,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:59:23,999 INFO L87 Difference]: Start difference. First operand 296 states and 772 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) [2022-11-18 19:59:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:25,812 INFO L93 Difference]: Finished difference Result 591 states and 1550 transitions. [2022-11-18 19:59:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:59:25,814 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 3 [2022-11-18 19:59:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:25,818 INFO L225 Difference]: With dead ends: 591 [2022-11-18 19:59:25,818 INFO L226 Difference]: Without dead ends: 591 [2022-11-18 19:59:25,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:59:25,820 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 173 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:25,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 3 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 19:59:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-11-18 19:59:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 302. [2022-11-18 19:59:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 215 states have (on average 3.6744186046511627) internal successors, (790), 301 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 790 transitions. [2022-11-18 19:59:25,837 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 790 transitions. Word has length 3 [2022-11-18 19:59:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:25,838 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 790 transitions. [2022-11-18 19:59:25,838 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) [2022-11-18 19:59:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 790 transitions. [2022-11-18 19:59:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 19:59:25,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:25,839 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 19:59:25,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:26,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:26,050 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 27517414, now seen corresponding path program 1 times [2022-11-18 19:59:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:26,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106892650] [2022-11-18 19:59:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:26,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:26,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:26,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:26,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 19:59:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:26,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:59:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:26,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:26,278 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:59:26,279 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-18 19:59:26,297 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 10 treesize of output 8 [2022-11-18 19:59:26,413 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 19:59:26,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 19:59:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:26,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:27,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:27,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106892650] [2022-11-18 19:59:27,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106892650] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:27,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:27,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 19:59:27,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849184300] [2022-11-18 19:59:27,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:27,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:59:27,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:27,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:59:27,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:59:27,083 INFO L87 Difference]: Start difference. First operand 302 states and 790 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2022-11-18 19:59:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:27,252 INFO L93 Difference]: Finished difference Result 305 states and 797 transitions. [2022-11-18 19:59:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:59:27,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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 4 [2022-11-18 19:59:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:27,255 INFO L225 Difference]: With dead ends: 305 [2022-11-18 19:59:27,255 INFO L226 Difference]: Without dead ends: 305 [2022-11-18 19:59:27,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:59:27,256 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:27,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-18 19:59:27,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-18 19:59:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-11-18 19:59:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 218 states have (on average 3.6559633027522938) internal successors, (797), 304 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 797 transitions. [2022-11-18 19:59:27,268 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 797 transitions. Word has length 4 [2022-11-18 19:59:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:27,269 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 797 transitions. [2022-11-18 19:59:27,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2022-11-18 19:59:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 797 transitions. [2022-11-18 19:59:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 19:59:27,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:27,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 19:59:27,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:27,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:27,482 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash 27517418, now seen corresponding path program 1 times [2022-11-18 19:59:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:27,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504795739] [2022-11-18 19:59:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:27,483 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 [2022-11-18 19:59:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:27,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:27,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 19:59:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 19:59:27,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:27,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:27,687 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-18 19:59:27,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-18 19:59:27,747 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:59:27,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 19:59:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:27,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:27,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:27,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504795739] [2022-11-18 19:59:27,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504795739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:27,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:27,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:59:27,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069427613] [2022-11-18 19:59:27,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:27,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:59:27,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:27,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:59:27,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:27,774 INFO L87 Difference]: Start difference. First operand 305 states and 797 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:27,946 INFO L93 Difference]: Finished difference Result 308 states and 802 transitions. [2022-11-18 19:59:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:59:27,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-18 19:59:27,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:27,949 INFO L225 Difference]: With dead ends: 308 [2022-11-18 19:59:27,949 INFO L226 Difference]: Without dead ends: 308 [2022-11-18 19:59:27,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:27,950 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:27,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-18 19:59:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-18 19:59:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-11-18 19:59:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 220 states have (on average 3.6454545454545455) internal successors, (802), 306 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 802 transitions. [2022-11-18 19:59:27,962 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 802 transitions. Word has length 4 [2022-11-18 19:59:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:27,963 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 802 transitions. [2022-11-18 19:59:27,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 802 transitions. [2022-11-18 19:59:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 19:59:27,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:27,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 19:59:27,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-18 19:59:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:28,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash 852162085, now seen corresponding path program 1 times [2022-11-18 19:59:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:28,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983470776] [2022-11-18 19:59:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:28,178 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 [2022-11-18 19:59:28,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:28,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:28,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 19:59:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:28,404 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:59:28,404 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-18 19:59:28,416 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 10 treesize of output 8 [2022-11-18 19:59:28,524 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 19:59:28,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 19:59:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:28,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:29,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983470776] [2022-11-18 19:59:29,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983470776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:29,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:29,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 19:59:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854107807] [2022-11-18 19:59:29,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:29,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:59:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:59:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:59:29,228 INFO L87 Difference]: Start difference. First operand 307 states and 802 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) [2022-11-18 19:59:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:30,050 INFO L93 Difference]: Finished difference Result 307 states and 800 transitions. [2022-11-18 19:59:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:59:30,051 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 5 [2022-11-18 19:59:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:30,053 INFO L225 Difference]: With dead ends: 307 [2022-11-18 19:59:30,053 INFO L226 Difference]: Without dead ends: 307 [2022-11-18 19:59:30,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:59:30,054 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:30,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 8 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 102 Unchecked, 0.6s Time] [2022-11-18 19:59:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-18 19:59:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-11-18 19:59:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 220 states have (on average 3.6363636363636362) internal successors, (800), 306 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 800 transitions. [2022-11-18 19:59:30,065 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 800 transitions. Word has length 5 [2022-11-18 19:59:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:30,066 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 800 transitions. [2022-11-18 19:59:30,066 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) [2022-11-18 19:59:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 800 transitions. [2022-11-18 19:59:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 19:59:30,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:30,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 19:59:30,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-18 19:59:30,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:30,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 852162089, now seen corresponding path program 1 times [2022-11-18 19:59:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261251938] [2022-11-18 19:59:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:30,284 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 [2022-11-18 19:59:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:30,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:30,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:30,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:59:30,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:30,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:30,475 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-18 19:59:30,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-18 19:59:30,559 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:59:30,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 19:59:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:59:30,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:30,598 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:30,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261251938] [2022-11-18 19:59:30,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261251938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:30,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:30,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:59:30,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240120682] [2022-11-18 19:59:30,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:30,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:59:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:30,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:59:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:30,600 INFO L87 Difference]: Start difference. First operand 307 states and 800 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) [2022-11-18 19:59:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:30,752 INFO L93 Difference]: Finished difference Result 306 states and 796 transitions. [2022-11-18 19:59:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:59:30,753 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 [2022-11-18 19:59:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:30,755 INFO L225 Difference]: With dead ends: 306 [2022-11-18 19:59:30,755 INFO L226 Difference]: Without dead ends: 306 [2022-11-18 19:59:30,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:30,756 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:30,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-18 19:59:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-18 19:59:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2022-11-18 19:59:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 215 states have (on average 3.646511627906977) internal successors, (784), 300 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 784 transitions. [2022-11-18 19:59:30,768 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 784 transitions. Word has length 5 [2022-11-18 19:59:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:30,768 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 784 transitions. [2022-11-18 19:59:30,769 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) [2022-11-18 19:59:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 784 transitions. [2022-11-18 19:59:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:59:30,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:30,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:59:30,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:30,987 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:30,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 674453872, now seen corresponding path program 1 times [2022-11-18 19:59:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:30,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587123852] [2022-11-18 19:59:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:30,988 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 [2022-11-18 19:59:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:30,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:31,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:59:31,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:31,152 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-18 19:59:31,152 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-18 19:59:31,182 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 19:59:31,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 19:59:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:31,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:31,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:31,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587123852] [2022-11-18 19:59:31,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587123852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:31,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:31,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 19:59:31,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613521302] [2022-11-18 19:59:31,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:31,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:59:31,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:31,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:59:31,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:31,202 INFO L87 Difference]: Start difference. First operand 301 states and 784 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-18 19:59:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:31,408 INFO L93 Difference]: Finished difference Result 285 states and 751 transitions. [2022-11-18 19:59:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:59:31,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-18 19:59:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:31,411 INFO L225 Difference]: With dead ends: 285 [2022-11-18 19:59:31,411 INFO L226 Difference]: Without dead ends: 285 [2022-11-18 19:59:31,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:31,412 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:31,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:59:31,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-18 19:59:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-11-18 19:59:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 209 states have (on average 3.5933014354066986) internal successors, (751), 284 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 751 transitions. [2022-11-18 19:59:31,421 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 751 transitions. Word has length 6 [2022-11-18 19:59:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:31,422 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 751 transitions. [2022-11-18 19:59:31,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-18 19:59:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 751 transitions. [2022-11-18 19:59:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:59:31,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:31,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:59:31,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:31,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:31,624 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:31,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:31,624 INFO L85 PathProgramCache]: Analyzing trace with hash 674453778, now seen corresponding path program 1 times [2022-11-18 19:59:31,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:31,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605497309] [2022-11-18 19:59:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:31,625 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 [2022-11-18 19:59:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:31,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:31,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 19:59:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:31,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:31,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:31,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605497309] [2022-11-18 19:59:31,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605497309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:31,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:31,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:59:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115656115] [2022-11-18 19:59:31,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:31,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:59:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:59:31,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:31,743 INFO L87 Difference]: Start difference. First operand 285 states and 751 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-18 19:59:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:31,954 INFO L93 Difference]: Finished difference Result 239 states and 629 transitions. [2022-11-18 19:59:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:59:31,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-18 19:59:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:31,956 INFO L225 Difference]: With dead ends: 239 [2022-11-18 19:59:31,956 INFO L226 Difference]: Without dead ends: 239 [2022-11-18 19:59:31,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:59:31,957 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:31,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:59:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-18 19:59:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2022-11-18 19:59:31,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 183 states have (on average 3.4371584699453552) internal successors, (629), 238 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 629 transitions. [2022-11-18 19:59:31,965 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 629 transitions. Word has length 6 [2022-11-18 19:59:31,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:31,965 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 629 transitions. [2022-11-18 19:59:31,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-18 19:59:31,966 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 629 transitions. [2022-11-18 19:59:31,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:59:31,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:31,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:59:31,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:32,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash 674453779, now seen corresponding path program 1 times [2022-11-18 19:59:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:32,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720060453] [2022-11-18 19:59:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:32,179 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 [2022-11-18 19:59:32,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:32,179 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:32,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 19:59:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:59:32,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:32,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:32,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:32,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720060453] [2022-11-18 19:59:32,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720060453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:32,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:32,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:59:32,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143822361] [2022-11-18 19:59:32,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:32,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:59:32,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:32,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:59:32,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:59:32,345 INFO L87 Difference]: Start difference. First operand 239 states and 629 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:32,793 INFO L93 Difference]: Finished difference Result 417 states and 1111 transitions. [2022-11-18 19:59:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 19:59:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:32,796 INFO L225 Difference]: With dead ends: 417 [2022-11-18 19:59:32,796 INFO L226 Difference]: Without dead ends: 417 [2022-11-18 19:59:32,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:59:32,797 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:32,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:59:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-18 19:59:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 285. [2022-11-18 19:59:32,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 229 states have (on average 3.6812227074235806) internal successors, (843), 284 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 843 transitions. [2022-11-18 19:59:32,820 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 843 transitions. Word has length 6 [2022-11-18 19:59:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:32,820 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 843 transitions. [2022-11-18 19:59:32,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 843 transitions. [2022-11-18 19:59:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:59:32,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:32,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:59:32,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:33,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:33,034 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:33,034 INFO L85 PathProgramCache]: Analyzing trace with hash 674453880, now seen corresponding path program 1 times [2022-11-18 19:59:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:33,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462297419] [2022-11-18 19:59:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:33,035 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 [2022-11-18 19:59:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:33,036 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:33,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 19:59:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:33,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:33,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:33,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462297419] [2022-11-18 19:59:33,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462297419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:33,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:33,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:59:33,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939101589] [2022-11-18 19:59:33,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:33,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:33,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:33,211 INFO L87 Difference]: Start difference. First operand 285 states and 843 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) [2022-11-18 19:59:33,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:33,640 INFO L93 Difference]: Finished difference Result 394 states and 1098 transitions. [2022-11-18 19:59:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:33,640 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 [2022-11-18 19:59:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:33,642 INFO L225 Difference]: With dead ends: 394 [2022-11-18 19:59:33,642 INFO L226 Difference]: Without dead ends: 394 [2022-11-18 19:59:33,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:33,643 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:33,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 19:59:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-18 19:59:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 362. [2022-11-18 19:59:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 306 states have (on average 3.4379084967320264) internal successors, (1052), 361 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1052 transitions. [2022-11-18 19:59:33,653 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1052 transitions. Word has length 6 [2022-11-18 19:59:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:33,654 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 1052 transitions. [2022-11-18 19:59:33,654 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) [2022-11-18 19:59:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1052 transitions. [2022-11-18 19:59:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:59:33,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:33,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 19:59:33,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:33,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:33,869 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:33,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:33,869 INFO L85 PathProgramCache]: Analyzing trace with hash 674453870, now seen corresponding path program 1 times [2022-11-18 19:59:33,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:33,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984231325] [2022-11-18 19:59:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:33,870 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 [2022-11-18 19:59:33,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:33,871 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:33,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:59:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:34,064 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-18 19:59:34,065 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-18 19:59:34,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 19:59:34,137 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 19:59:34,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 19:59:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:34,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:34,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:34,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984231325] [2022-11-18 19:59:34,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984231325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:34,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:34,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-11-18 19:59:34,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330838936] [2022-11-18 19:59:34,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:34,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 19:59:34,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 19:59:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:59:34,786 INFO L87 Difference]: Start difference. First operand 362 states and 1052 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:35,453 INFO L93 Difference]: Finished difference Result 695 states and 2042 transitions. [2022-11-18 19:59:35,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:59:35,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 19:59:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:35,458 INFO L225 Difference]: With dead ends: 695 [2022-11-18 19:59:35,458 INFO L226 Difference]: Without dead ends: 695 [2022-11-18 19:59:35,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 19:59:35,459 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 106 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:35,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 4 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2022-11-18 19:59:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-11-18 19:59:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 373. [2022-11-18 19:59:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 320 states have (on average 3.36875) internal successors, (1078), 372 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1078 transitions. [2022-11-18 19:59:35,476 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1078 transitions. Word has length 6 [2022-11-18 19:59:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:35,476 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 1078 transitions. [2022-11-18 19:59:35,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1078 transitions. [2022-11-18 19:59:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:59:35,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:35,477 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1] [2022-11-18 19:59:35,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:35,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:35,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:35,694 INFO L85 PathProgramCache]: Analyzing trace with hash 674419686, now seen corresponding path program 2 times [2022-11-18 19:59:35,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:35,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254946279] [2022-11-18 19:59:35,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:59:35,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:35,696 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:35,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 19:59:35,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:59:35,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:35,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:59:35,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:35,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:35,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:35,861 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:59:35,861 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-18 19:59:35,873 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 10 treesize of output 8 [2022-11-18 19:59:35,949 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:59:35,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 19:59:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 19:59:36,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:36,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:36,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254946279] [2022-11-18 19:59:36,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254946279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:36,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:36,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:59:36,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768833397] [2022-11-18 19:59:36,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:36,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:36,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:36,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:36,096 INFO L87 Difference]: Start difference. First operand 373 states and 1078 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:36,247 INFO L93 Difference]: Finished difference Result 373 states and 1076 transitions. [2022-11-18 19:59:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:36,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 19:59:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:36,250 INFO L225 Difference]: With dead ends: 373 [2022-11-18 19:59:36,250 INFO L226 Difference]: Without dead ends: 373 [2022-11-18 19:59:36,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:36,251 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:36,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-18 19:59:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-11-18 19:59:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2022-11-18 19:59:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 320 states have (on average 3.3625) internal successors, (1076), 372 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1076 transitions. [2022-11-18 19:59:36,263 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1076 transitions. Word has length 6 [2022-11-18 19:59:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:36,263 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 1076 transitions. [2022-11-18 19:59:36,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1076 transitions. [2022-11-18 19:59:36,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 19:59:36,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:36,264 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-18 19:59:36,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:36,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:36,488 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:36,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:36,489 INFO L85 PathProgramCache]: Analyzing trace with hash 646313641, now seen corresponding path program 2 times [2022-11-18 19:59:36,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:36,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546151502] [2022-11-18 19:59:36,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:59:36,489 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 [2022-11-18 19:59:36,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:36,490 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:36,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 19:59:36,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:59:36,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:36,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 19:59:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:36,663 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 19:59:36,664 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 19:59:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:36,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:59:37,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:37,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546151502] [2022-11-18 19:59:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546151502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:37,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:37,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 19:59:37,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242455418] [2022-11-18 19:59:37,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:37,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:59:37,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:37,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:59:37,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:59:37,621 INFO L87 Difference]: Start difference. First operand 373 states and 1076 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:41,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:59:44,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:59:46,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 19:59:48,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:48,909 INFO L93 Difference]: Finished difference Result 2022 states and 5997 transitions. [2022-11-18 19:59:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 19:59:48,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 19:59:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:48,923 INFO L225 Difference]: With dead ends: 2022 [2022-11-18 19:59:48,923 INFO L226 Difference]: Without dead ends: 2022 [2022-11-18 19:59:48,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:59:48,924 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 738 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 110 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:48,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 23 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 705 Invalid, 3 Unknown, 0 Unchecked, 9.8s Time] [2022-11-18 19:59:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2022-11-18 19:59:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 385. [2022-11-18 19:59:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 332 states have (on average 3.322289156626506) internal successors, (1103), 384 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1103 transitions. [2022-11-18 19:59:48,954 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1103 transitions. Word has length 6 [2022-11-18 19:59:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:48,954 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 1103 transitions. [2022-11-18 19:59:48,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1103 transitions. [2022-11-18 19:59:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:59:48,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:48,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:48,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:49,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:49,167 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:49,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1410967049, now seen corresponding path program 1 times [2022-11-18 19:59:49,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:49,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132340313] [2022-11-18 19:59:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:49,168 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 [2022-11-18 19:59:49,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:49,169 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:49,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:59:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:49,404 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-18 19:59:49,405 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-18 19:59:49,436 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 19:59:49,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-18 19:59:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 19:59:49,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:49,450 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:49,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132340313] [2022-11-18 19:59:49,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132340313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:49,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:49,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:59:49,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962206328] [2022-11-18 19:59:49,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:49,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:49,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:49,452 INFO L87 Difference]: Start difference. First operand 385 states and 1103 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:49,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:49,658 INFO L93 Difference]: Finished difference Result 319 states and 886 transitions. [2022-11-18 19:59:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:49,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 19:59:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:49,660 INFO L225 Difference]: With dead ends: 319 [2022-11-18 19:59:49,661 INFO L226 Difference]: Without dead ends: 319 [2022-11-18 19:59:49,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:59:49,661 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:49,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 19:59:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-18 19:59:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2022-11-18 19:59:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 3.076388888888889) internal successors, (886), 318 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 886 transitions. [2022-11-18 19:59:49,671 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 886 transitions. Word has length 7 [2022-11-18 19:59:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:49,672 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 886 transitions. [2022-11-18 19:59:49,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 886 transitions. [2022-11-18 19:59:49,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:59:49,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:49,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:49,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:49,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:49,886 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:49,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:49,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1410967048, now seen corresponding path program 1 times [2022-11-18 19:59:49,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:49,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759765783] [2022-11-18 19:59:49,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:49,887 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 [2022-11-18 19:59:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:49,888 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:49,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-18 19:59:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 19:59:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:50,195 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 19:59:50,196 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 19:59:50,265 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-18 19:59:50,265 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-18 19:59:50,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:50,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 19:59:50,416 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 19:59:50,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 19:59:50,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:50,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:55,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:55,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759765783] [2022-11-18 19:59:55,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759765783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:55,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:55,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 19:59:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440926433] [2022-11-18 19:59:55,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 19:59:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 19:59:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:59:55,986 INFO L87 Difference]: Start difference. First operand 319 states and 886 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:56,208 INFO L93 Difference]: Finished difference Result 345 states and 946 transitions. [2022-11-18 19:59:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:59:56,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 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 [2022-11-18 19:59:56,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:56,211 INFO L225 Difference]: With dead ends: 345 [2022-11-18 19:59:56,211 INFO L226 Difference]: Without dead ends: 345 [2022-11-18 19:59:56,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:59:56,212 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:56,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-11-18 19:59:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-18 19:59:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 331. [2022-11-18 19:59:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 300 states have (on average 3.0533333333333332) internal successors, (916), 330 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 916 transitions. [2022-11-18 19:59:56,222 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 916 transitions. Word has length 7 [2022-11-18 19:59:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:56,222 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 916 transitions. [2022-11-18 19:59:56,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 916 transitions. [2022-11-18 19:59:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 19:59:56,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:56,224 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-18 19:59:56,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:56,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:56,436 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1411001243, now seen corresponding path program 2 times [2022-11-18 19:59:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:56,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921083617] [2022-11-18 19:59:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:59:56,438 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 [2022-11-18 19:59:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:56,439 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:56,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 19:59:56,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:59:56,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:59:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 19:59:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:59:56,616 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:59:56,617 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-18 19:59:56,629 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 10 treesize of output 8 [2022-11-18 19:59:56,715 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 19:59:56,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 19:59:56,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:59:56,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:59:56,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921083617] [2022-11-18 19:59:56,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921083617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:59:56,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:59:56,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:59:56,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306009174] [2022-11-18 19:59:56,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:59:56,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:59:56,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:56,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:59:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:56,883 INFO L87 Difference]: Start difference. First operand 331 states and 916 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 19:59:57,026 INFO L93 Difference]: Finished difference Result 330 states and 906 transitions. [2022-11-18 19:59:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:59:57,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 19:59:57,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 19:59:57,029 INFO L225 Difference]: With dead ends: 330 [2022-11-18 19:59:57,029 INFO L226 Difference]: Without dead ends: 330 [2022-11-18 19:59:57,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:59:57,030 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 19:59:57,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-18 19:59:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-18 19:59:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-11-18 19:59:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 300 states have (on average 3.02) internal successors, (906), 329 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 906 transitions. [2022-11-18 19:59:57,039 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 906 transitions. Word has length 7 [2022-11-18 19:59:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 19:59:57,040 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 906 transitions. [2022-11-18 19:59:57,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:59:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 906 transitions. [2022-11-18 19:59:57,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 19:59:57,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 19:59:57,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:59:57,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 19:59:57,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 19:59:57,252 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 19:59:57,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:59:57,253 INFO L85 PathProgramCache]: Analyzing trace with hash -389958151, now seen corresponding path program 1 times [2022-11-18 19:59:57,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 19:59:57,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974477259] [2022-11-18 19:59:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:59:57,253 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 [2022-11-18 19:59:57,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 19:59:57,254 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 19:59:57,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 19:59:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:59:57,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 19:59:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:59:57,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 19:59:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:57,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:59:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 19:59:58,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 19:59:58,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974477259] [2022-11-18 19:59:58,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974477259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:59:58,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:59:58,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 19:59:58,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549967571] [2022-11-18 19:59:58,138 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 19:59:58,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:59:58,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 19:59:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:59:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:59:58,139 INFO L87 Difference]: Start difference. First operand 330 states and 906 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:01,018 INFO L93 Difference]: Finished difference Result 836 states and 2222 transitions. [2022-11-18 20:00:01,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:00:01,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-18 20:00:01,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:01,024 INFO L225 Difference]: With dead ends: 836 [2022-11-18 20:00:01,024 INFO L226 Difference]: Without dead ends: 836 [2022-11-18 20:00:01,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:00:01,025 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:01,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 232 Invalid, 0 Unknown, 61 Unchecked, 2.5s Time] [2022-11-18 20:00:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-18 20:00:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 646. [2022-11-18 20:00:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 616 states have (on average 3.1006493506493507) internal successors, (1910), 645 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1910 transitions. [2022-11-18 20:00:01,045 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1910 transitions. Word has length 8 [2022-11-18 20:00:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:01,045 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1910 transitions. [2022-11-18 20:00:01,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1910 transitions. [2022-11-18 20:00:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:00:01,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:01,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:01,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-18 20:00:01,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:01,258 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:01,258 INFO L85 PathProgramCache]: Analyzing trace with hash -389871706, now seen corresponding path program 1 times [2022-11-18 20:00:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:01,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125927063] [2022-11-18 20:00:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:01,259 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 [2022-11-18 20:00:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:01,260 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:01,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-18 20:00:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:01,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:00:01,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:01,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:01,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:01,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125927063] [2022-11-18 20:00:01,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125927063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:01,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:01,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:00:01,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184216657] [2022-11-18 20:00:01,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:01,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:00:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:01,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:00:01,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:00:01,377 INFO L87 Difference]: Start difference. First operand 646 states and 1910 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:01,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:01,544 INFO L93 Difference]: Finished difference Result 531 states and 1511 transitions. [2022-11-18 20:00:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:00:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 20:00:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:01,547 INFO L225 Difference]: With dead ends: 531 [2022-11-18 20:00:01,547 INFO L226 Difference]: Without dead ends: 531 [2022-11-18 20:00:01,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:00:01,548 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:01,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:00:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-11-18 20:00:01,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 531. [2022-11-18 20:00:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 509 states have (on average 2.968565815324165) internal successors, (1511), 530 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1511 transitions. [2022-11-18 20:00:01,562 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1511 transitions. Word has length 8 [2022-11-18 20:00:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:01,562 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 1511 transitions. [2022-11-18 20:00:01,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1511 transitions. [2022-11-18 20:00:01,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:00:01,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:01,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:01,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:01,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:01,775 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:01,776 INFO L85 PathProgramCache]: Analyzing trace with hash -389871705, now seen corresponding path program 1 times [2022-11-18 20:00:01,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:01,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750631463] [2022-11-18 20:00:01,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:01,776 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 [2022-11-18 20:00:01,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:01,777 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:01,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-18 20:00:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:01,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:00:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:01,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:01,939 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:01,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750631463] [2022-11-18 20:00:01,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750631463] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:01,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:01,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:00:01,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434635466] [2022-11-18 20:00:01,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:01,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:00:01,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:00:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:00:01,940 INFO L87 Difference]: Start difference. First operand 531 states and 1511 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:02,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:02,103 INFO L93 Difference]: Finished difference Result 416 states and 1112 transitions. [2022-11-18 20:00:02,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:00:02,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 20:00:02,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:02,106 INFO L225 Difference]: With dead ends: 416 [2022-11-18 20:00:02,106 INFO L226 Difference]: Without dead ends: 416 [2022-11-18 20:00:02,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:00:02,107 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:02,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 1 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:00:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-18 20:00:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-11-18 20:00:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 402 states have (on average 2.7661691542288556) internal successors, (1112), 415 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1112 transitions. [2022-11-18 20:00:02,118 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1112 transitions. Word has length 8 [2022-11-18 20:00:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:02,119 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1112 transitions. [2022-11-18 20:00:02,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1112 transitions. [2022-11-18 20:00:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:00:02,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:02,120 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-18 20:00:02,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-18 20:00:02,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:02,331 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:02,332 INFO L85 PathProgramCache]: Analyzing trace with hash -422720658, now seen corresponding path program 2 times [2022-11-18 20:00:02,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:02,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720497209] [2022-11-18 20:00:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:00:02,332 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 [2022-11-18 20:00:02,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:02,333 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:02,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:00:02,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:00:02,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:02,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:00:02,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:02,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:02,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:02,480 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:00:02,480 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-18 20:00:02,486 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 [2022-11-18 20:00:02,528 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:00:02,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:00:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:00:02,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:02,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:02,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720497209] [2022-11-18 20:00:02,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720497209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:02,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:02,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:00:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70025168] [2022-11-18 20:00:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:02,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:00:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:00:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:02,727 INFO L87 Difference]: Start difference. First operand 416 states and 1112 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:03,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:03,019 INFO L93 Difference]: Finished difference Result 414 states and 1106 transitions. [2022-11-18 20:00:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:00:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 20:00:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:03,022 INFO L225 Difference]: With dead ends: 414 [2022-11-18 20:00:03,022 INFO L226 Difference]: Without dead ends: 414 [2022-11-18 20:00:03,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:00:03,023 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:03,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 28 Unchecked, 0.3s Time] [2022-11-18 20:00:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-11-18 20:00:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2022-11-18 20:00:03,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 400 states have (on average 2.765) internal successors, (1106), 413 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1106 transitions. [2022-11-18 20:00:03,034 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1106 transitions. Word has length 8 [2022-11-18 20:00:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:03,034 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 1106 transitions. [2022-11-18 20:00:03,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1106 transitions. [2022-11-18 20:00:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:00:03,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:03,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:03,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:00:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:03,247 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:03,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:03,247 INFO L85 PathProgramCache]: Analyzing trace with hash -790305045, now seen corresponding path program 1 times [2022-11-18 20:00:03,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:03,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158499951] [2022-11-18 20:00:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:03,247 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 [2022-11-18 20:00:03,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:03,248 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:03,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-18 20:00:03,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:00:03,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:03,527 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 20:00:03,527 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 20:00:03,616 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-18 20:00:03,616 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-18 20:00:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:03,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:00:03,767 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:00:03,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 20:00:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:03,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:10,450 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:00:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:11,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:11,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158499951] [2022-11-18 20:00:11,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158499951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:11,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:11,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 20:00:11,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444793614] [2022-11-18 20:00:11,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:11,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:00:11,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:00:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:00:11,054 INFO L87 Difference]: Start difference. First operand 414 states and 1106 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:11,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:11,268 INFO L93 Difference]: Finished difference Result 428 states and 1132 transitions. [2022-11-18 20:00:11,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:00:11,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-11-18 20:00:11,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:11,272 INFO L225 Difference]: With dead ends: 428 [2022-11-18 20:00:11,272 INFO L226 Difference]: Without dead ends: 428 [2022-11-18 20:00:11,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:00:11,272 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:11,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-18 20:00:11,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-18 20:00:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 415. [2022-11-18 20:00:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 401 states have (on average 2.7630922693266835) internal successors, (1108), 414 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1108 transitions. [2022-11-18 20:00:11,282 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1108 transitions. Word has length 8 [2022-11-18 20:00:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:11,282 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 1108 transitions. [2022-11-18 20:00:11,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:11,283 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1108 transitions. [2022-11-18 20:00:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:00:11,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:11,283 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:11,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:11,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:11,496 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash -219440611, now seen corresponding path program 1 times [2022-11-18 20:00:11,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:11,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916354401] [2022-11-18 20:00:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:11,497 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 [2022-11-18 20:00:11,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:11,498 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:11,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:00:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:00:11,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:11,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:11,730 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:00:11,730 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-18 20:00:11,737 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 [2022-11-18 20:00:11,785 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:00:11,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:00:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:12,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:13,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:13,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916354401] [2022-11-18 20:00:13,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916354401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:13,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:13,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 20:00:13,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406193502] [2022-11-18 20:00:13,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:13,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:00:13,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:13,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:00:13,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:00:13,265 INFO L87 Difference]: Start difference. First operand 415 states and 1108 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:14,821 INFO L93 Difference]: Finished difference Result 1077 states and 2945 transitions. [2022-11-18 20:00:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:00:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-18 20:00:14,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:14,825 INFO L225 Difference]: With dead ends: 1077 [2022-11-18 20:00:14,825 INFO L226 Difference]: Without dead ends: 1077 [2022-11-18 20:00:14,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:00:14,826 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 144 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:14,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 14 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 170 Invalid, 0 Unknown, 328 Unchecked, 1.0s Time] [2022-11-18 20:00:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-11-18 20:00:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 415. [2022-11-18 20:00:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 401 states have (on average 2.7630922693266835) internal successors, (1108), 414 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1108 transitions. [2022-11-18 20:00:14,841 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1108 transitions. Word has length 9 [2022-11-18 20:00:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:14,842 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 1108 transitions. [2022-11-18 20:00:14,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1108 transitions. [2022-11-18 20:00:14,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:00:14,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:14,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:14,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:00:15,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:15,056 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1270256414, now seen corresponding path program 1 times [2022-11-18 20:00:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:15,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814324151] [2022-11-18 20:00:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:15,057 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 [2022-11-18 20:00:15,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:15,058 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:15,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:00:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:15,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:00:15,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:15,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:15,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:15,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814324151] [2022-11-18 20:00:15,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814324151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:15,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:15,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-18 20:00:15,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765333193] [2022-11-18 20:00:15,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:15,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:00:15,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:00:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:00:15,623 INFO L87 Difference]: Start difference. First operand 415 states and 1108 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:17,057 INFO L93 Difference]: Finished difference Result 603 states and 1468 transitions. [2022-11-18 20:00:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:00:17,058 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-18 20:00:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:17,060 INFO L225 Difference]: With dead ends: 603 [2022-11-18 20:00:17,060 INFO L226 Difference]: Without dead ends: 603 [2022-11-18 20:00:17,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:00:17,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 186 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:17,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 0 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 343 Invalid, 0 Unknown, 1 Unchecked, 1.2s Time] [2022-11-18 20:00:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-11-18 20:00:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 492. [2022-11-18 20:00:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 478 states have (on average 2.725941422594142) internal successors, (1303), 491 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1303 transitions. [2022-11-18 20:00:17,079 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1303 transitions. Word has length 9 [2022-11-18 20:00:17,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:17,080 INFO L495 AbstractCegarLoop]: Abstraction has 492 states and 1303 transitions. [2022-11-18 20:00:17,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:17,080 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1303 transitions. [2022-11-18 20:00:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:00:17,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:17,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:17,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:17,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:17,293 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:17,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:17,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1270342780, now seen corresponding path program 1 times [2022-11-18 20:00:17,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:17,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042603739] [2022-11-18 20:00:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:17,294 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 [2022-11-18 20:00:17,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:17,295 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:17,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-18 20:00:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:00:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:17,598 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 20:00:17,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 20:00:17,674 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-18 20:00:17,674 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-18 20:00:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:17,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:00:17,837 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:00:17,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 20:00:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:17,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:00:27,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:27,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042603739] [2022-11-18 20:00:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042603739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:27,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:27,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 20:00:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396107140] [2022-11-18 20:00:27,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:27,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:00:27,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:00:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:00:27,132 INFO L87 Difference]: Start difference. First operand 492 states and 1303 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:27,398 INFO L93 Difference]: Finished difference Result 516 states and 1362 transitions. [2022-11-18 20:00:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:00:27,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-18 20:00:27,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:27,401 INFO L225 Difference]: With dead ends: 516 [2022-11-18 20:00:27,402 INFO L226 Difference]: Without dead ends: 516 [2022-11-18 20:00:27,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:00:27,403 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:27,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-11-18 20:00:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-11-18 20:00:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 516. [2022-11-18 20:00:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 502 states have (on average 2.7131474103585655) internal successors, (1362), 515 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1362 transitions. [2022-11-18 20:00:27,414 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1362 transitions. Word has length 9 [2022-11-18 20:00:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:27,414 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 1362 transitions. [2022-11-18 20:00:27,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1362 transitions. [2022-11-18 20:00:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:00:27,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:27,415 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:27,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:27,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:27,628 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash 25708056, now seen corresponding path program 2 times [2022-11-18 20:00:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:27,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734143120] [2022-11-18 20:00:27,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:00:27,629 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 [2022-11-18 20:00:27,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:27,630 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:27,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-18 20:00:27,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:00:27,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:27,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:00:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:27,896 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 20:00:27,896 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 20:00:27,978 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-18 20:00:27,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-18 20:00:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:28,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:00:28,111 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:00:28,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-18 20:00:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:00:28,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:28,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:28,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734143120] [2022-11-18 20:00:28,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734143120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:28,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:28,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:00:28,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580317789] [2022-11-18 20:00:28,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:28,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:00:28,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:00:28,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:00:28,169 INFO L87 Difference]: Start difference. First operand 516 states and 1362 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:28,421 INFO L93 Difference]: Finished difference Result 452 states and 1126 transitions. [2022-11-18 20:00:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:00:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:00:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:28,425 INFO L225 Difference]: With dead ends: 452 [2022-11-18 20:00:28,425 INFO L226 Difference]: Without dead ends: 452 [2022-11-18 20:00:28,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:00:28,426 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:28,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:00:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-11-18 20:00:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 412. [2022-11-18 20:00:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 404 states have (on average 2.5742574257425743) internal successors, (1040), 411 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1040 transitions. [2022-11-18 20:00:28,437 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1040 transitions. Word has length 9 [2022-11-18 20:00:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:28,437 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 1040 transitions. [2022-11-18 20:00:28,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1040 transitions. [2022-11-18 20:00:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:00:28,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:28,438 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-11-18 20:00:28,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:28,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:28,650 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:28,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1754478395, now seen corresponding path program 1 times [2022-11-18 20:00:28,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:28,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31746171] [2022-11-18 20:00:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:28,651 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 [2022-11-18 20:00:28,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:28,652 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:28,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:00:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:28,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:00:28,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:28,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:00:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:29,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:31,534 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:31,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31746171] [2022-11-18 20:00:31,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31746171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:31,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:31,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-18 20:00:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659175175] [2022-11-18 20:00:31,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:31,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:00:31,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:00:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:00:31,536 INFO L87 Difference]: Start difference. First operand 412 states and 1040 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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) [2022-11-18 20:00:36,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:00:38,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:00:40,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:00:42,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:00:44,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:00:46,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:00:47,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:00:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:56,953 INFO L93 Difference]: Finished difference Result 3708 states and 9751 transitions. [2022-11-18 20:00:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:00:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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 10 [2022-11-18 20:00:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:56,970 INFO L225 Difference]: With dead ends: 3708 [2022-11-18 20:00:56,970 INFO L226 Difference]: Without dead ends: 3708 [2022-11-18 20:00:56,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:00:56,971 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1271 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 126 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1271 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:56,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1271 Valid, 62 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1415 Invalid, 6 Unknown, 0 Unchecked, 19.8s Time] [2022-11-18 20:00:56,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2022-11-18 20:00:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 430. [2022-11-18 20:00:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 422 states have (on average 2.5497630331753554) internal successors, (1076), 429 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1076 transitions. [2022-11-18 20:00:57,007 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1076 transitions. Word has length 10 [2022-11-18 20:00:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:57,007 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 1076 transitions. [2022-11-18 20:00:57,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 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) [2022-11-18 20:00:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1076 transitions. [2022-11-18 20:00:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:00:57,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:57,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:57,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:57,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:57,228 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 509441845, now seen corresponding path program 1 times [2022-11-18 20:00:57,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:57,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955085547] [2022-11-18 20:00:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:57,230 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 [2022-11-18 20:00:57,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:57,231 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:57,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-18 20:00:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:57,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:00:57,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:00:57,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:57,661 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 11 treesize of output 9 [2022-11-18 20:00:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:00:57,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:00:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955085547] [2022-11-18 20:00:57,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955085547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:57,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:57,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:00:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764066955] [2022-11-18 20:00:57,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:57,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:00:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:00:57,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:00:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:00:57,917 INFO L87 Difference]: Start difference. First operand 430 states and 1076 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:59,645 INFO L93 Difference]: Finished difference Result 507 states and 1168 transitions. [2022-11-18 20:00:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:00:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-18 20:00:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:59,648 INFO L225 Difference]: With dead ends: 507 [2022-11-18 20:00:59,648 INFO L226 Difference]: Without dead ends: 507 [2022-11-18 20:00:59,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:00:59,649 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 225 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:59,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 0 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 20:00:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-18 20:00:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 420. [2022-11-18 20:00:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 414 states have (on average 2.495169082125604) internal successors, (1033), 419 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1033 transitions. [2022-11-18 20:00:59,659 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1033 transitions. Word has length 11 [2022-11-18 20:00:59,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:59,659 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 1033 transitions. [2022-11-18 20:00:59,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:00:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1033 transitions. [2022-11-18 20:00:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:00:59,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:59,660 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 20:00:59,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:59,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:00:59,874 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:00:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash 563527241, now seen corresponding path program 3 times [2022-11-18 20:00:59,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:00:59,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266683350] [2022-11-18 20:00:59,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:00:59,875 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 [2022-11-18 20:00:59,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:00:59,876 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:00:59,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Waiting until timeout for monitored process [2022-11-18 20:01:00,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:01:00,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:01:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:00,177 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-18 20:01:00,177 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-18 20:01:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:04,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:04,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266683350] [2022-11-18 20:01:04,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266683350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:04,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:04,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-18 20:01:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195091354] [2022-11-18 20:01:04,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:04,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:01:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:01:04,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:01:04,423 INFO L87 Difference]: Start difference. First operand 420 states and 1033 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:15,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:17,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:19,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:21,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:23,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:25,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:27,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:29,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:31,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:01:33,864 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 [] [2022-11-18 20:01:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:45,882 INFO L93 Difference]: Finished difference Result 3056 states and 7856 transitions. [2022-11-18 20:01:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:01:45,884 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 20:01:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:45,891 INFO L225 Difference]: With dead ends: 3056 [2022-11-18 20:01:45,891 INFO L226 Difference]: Without dead ends: 3056 [2022-11-18 20:01:45,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:01:45,893 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1924 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 212 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1924 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:45,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1924 Valid, 119 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2608 Invalid, 10 Unknown, 0 Unchecked, 27.6s Time] [2022-11-18 20:01:45,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2022-11-18 20:01:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 432. [2022-11-18 20:01:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 2.4812206572769955) internal successors, (1057), 431 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:45,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1057 transitions. [2022-11-18 20:01:45,919 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1057 transitions. Word has length 12 [2022-11-18 20:01:45,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:45,919 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1057 transitions. [2022-11-18 20:01:45,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:45,920 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1057 transitions. [2022-11-18 20:01:45,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:01:45,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:45,920 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:45,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:01:46,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:46,134 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:01:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:46,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2080328163, now seen corresponding path program 2 times [2022-11-18 20:01:46,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:46,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900679690] [2022-11-18 20:01:46,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:01:46,135 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 [2022-11-18 20:01:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:46,136 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:01:46,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:01:46,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:01:46,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:01:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:46,349 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-18 20:01:46,349 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-18 20:01:46,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:01:46,419 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:01:46,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:01:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:01:46,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:01:46,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:46,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900679690] [2022-11-18 20:01:46,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900679690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:01:46,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:01:46,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:01:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228030833] [2022-11-18 20:01:46,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:01:46,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:01:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:01:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:01:46,782 INFO L87 Difference]: Start difference. First operand 432 states and 1057 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:47,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:47,018 INFO L93 Difference]: Finished difference Result 430 states and 1052 transitions. [2022-11-18 20:01:47,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:01:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:01:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:47,020 INFO L225 Difference]: With dead ends: 430 [2022-11-18 20:01:47,020 INFO L226 Difference]: Without dead ends: 430 [2022-11-18 20:01:47,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:01:47,021 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:47,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-18 20:01:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-11-18 20:01:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2022-11-18 20:01:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 424 states have (on average 2.481132075471698) internal successors, (1052), 429 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1052 transitions. [2022-11-18 20:01:47,030 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1052 transitions. Word has length 13 [2022-11-18 20:01:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:47,031 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 1052 transitions. [2022-11-18 20:01:47,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1052 transitions. [2022-11-18 20:01:47,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:01:47,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:47,032 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:01:47,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:01:47,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:47,244 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:01:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:47,244 INFO L85 PathProgramCache]: Analyzing trace with hash -65663916, now seen corresponding path program 1 times [2022-11-18 20:01:47,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:47,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234538672] [2022-11-18 20:01:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:01:47,245 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 [2022-11-18 20:01:47,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:47,246 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:01:47,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-18 20:01:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:01:47,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:01:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:47,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:47,567 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:01:47,567 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-18 20:01:47,573 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 [2022-11-18 20:01:47,632 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:01:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:01:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:48,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:50,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234538672] [2022-11-18 20:01:50,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234538672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:50,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:50,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-18 20:01:50,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745286115] [2022-11-18 20:01:50,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:50,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:01:50,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:01:50,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:01:50,994 INFO L87 Difference]: Start difference. First operand 430 states and 1052 transitions. Second operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:01:55,739 INFO L93 Difference]: Finished difference Result 1039 states and 2603 transitions. [2022-11-18 20:01:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:01:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 20:01:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:01:55,744 INFO L225 Difference]: With dead ends: 1039 [2022-11-18 20:01:55,744 INFO L226 Difference]: Without dead ends: 1039 [2022-11-18 20:01:55,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:01:55,744 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 210 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:01:55,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 36 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 365 Invalid, 0 Unknown, 328 Unchecked, 1.3s Time] [2022-11-18 20:01:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-11-18 20:01:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 450. [2022-11-18 20:01:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 444 states have (on average 2.4864864864864864) internal successors, (1104), 449 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1104 transitions. [2022-11-18 20:01:55,762 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1104 transitions. Word has length 14 [2022-11-18 20:01:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:01:55,763 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 1104 transitions. [2022-11-18 20:01:55,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:01:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1104 transitions. [2022-11-18 20:01:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:01:55,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:01:55,764 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1] [2022-11-18 20:01:55,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-18 20:01:55,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:01:55,984 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:01:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:01:55,985 INFO L85 PathProgramCache]: Analyzing trace with hash -671561925, now seen corresponding path program 2 times [2022-11-18 20:01:55,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:01:55,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868371734] [2022-11-18 20:01:55,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:01:55,985 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 [2022-11-18 20:01:55,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:01:55,986 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:01:55,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-18 20:01:56,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:01:56,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:01:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:01:56,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:01:56,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:01:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:56,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:01:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:01:58,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:01:58,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868371734] [2022-11-18 20:01:58,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868371734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:01:58,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:01:58,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:01:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131571010] [2022-11-18 20:01:58,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:01:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:01:58,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:01:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:01:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:01:58,897 INFO L87 Difference]: Start difference. First operand 450 states and 1104 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:05,577 INFO L93 Difference]: Finished difference Result 852 states and 2132 transitions. [2022-11-18 20:02:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:02:05,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-18 20:02:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:05,581 INFO L225 Difference]: With dead ends: 852 [2022-11-18 20:02:05,581 INFO L226 Difference]: Without dead ends: 852 [2022-11-18 20:02:05,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:02:05,582 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 253 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:05,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 0 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 631 Invalid, 0 Unknown, 169 Unchecked, 4.7s Time] [2022-11-18 20:02:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-18 20:02:05,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 626. [2022-11-18 20:02:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 620 states have (on average 2.643548387096774) internal successors, (1639), 625 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1639 transitions. [2022-11-18 20:02:05,596 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1639 transitions. Word has length 15 [2022-11-18 20:02:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:05,596 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1639 transitions. [2022-11-18 20:02:05,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:05,596 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1639 transitions. [2022-11-18 20:02:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:02:05,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:05,598 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:05,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:05,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:05,811 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:02:05,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:05,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2035580707, now seen corresponding path program 1 times [2022-11-18 20:02:05,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:05,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88594572] [2022-11-18 20:02:05,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:05,812 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 [2022-11-18 20:02:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:05,815 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:02:05,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:02:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:02:06,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:06,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:02:06,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:02:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:02:06,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:02:06,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:06,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88594572] [2022-11-18 20:02:06,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88594572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:06,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:06,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 20:02:06,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474206572] [2022-11-18 20:02:06,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:06,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:02:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:02:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:02:06,986 INFO L87 Difference]: Start difference. First operand 626 states and 1639 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:09,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:09,564 INFO L93 Difference]: Finished difference Result 842 states and 2092 transitions. [2022-11-18 20:02:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:02:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 20:02:09,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:09,567 INFO L225 Difference]: With dead ends: 842 [2022-11-18 20:02:09,567 INFO L226 Difference]: Without dead ends: 842 [2022-11-18 20:02:09,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:02:09,568 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 316 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:09,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 0 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 556 Invalid, 0 Unknown, 55 Unchecked, 2.0s Time] [2022-11-18 20:02:09,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-18 20:02:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 793. [2022-11-18 20:02:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 787 states have (on average 2.5387547649301143) internal successors, (1998), 792 states have internal predecessors, (1998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1998 transitions. [2022-11-18 20:02:09,578 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1998 transitions. Word has length 15 [2022-11-18 20:02:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:09,579 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1998 transitions. [2022-11-18 20:02:09,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:09,579 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1998 transitions. [2022-11-18 20:02:09,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:02:09,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:09,580 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:09,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:09,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:09,780 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:02:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1430512669, now seen corresponding path program 1 times [2022-11-18 20:02:09,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584094262] [2022-11-18 20:02:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:09,781 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 [2022-11-18 20:02:09,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:09,782 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:02:09,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-18 20:02:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:10,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:02:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:10,195 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-18 20:02:10,195 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-18 20:02:10,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:02:10,289 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:02:10,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:02:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:02:11,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:02:13,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:13,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584094262] [2022-11-18 20:02:13,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584094262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:13,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:13,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-18 20:02:13,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436980019] [2022-11-18 20:02:13,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:02:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:02:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:02:13,632 INFO L87 Difference]: Start difference. First operand 793 states and 1998 transitions. Second operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:19,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:19,454 INFO L93 Difference]: Finished difference Result 1200 states and 2981 transitions. [2022-11-18 20:02:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:02:19,455 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-18 20:02:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:19,458 INFO L225 Difference]: With dead ends: 1200 [2022-11-18 20:02:19,458 INFO L226 Difference]: Without dead ends: 1200 [2022-11-18 20:02:19,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=426, Invalid=906, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:02:19,460 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 346 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:19,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 36 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 356 Invalid, 0 Unknown, 425 Unchecked, 1.6s Time] [2022-11-18 20:02:19,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-11-18 20:02:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 800. [2022-11-18 20:02:19,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 794 states have (on average 2.5352644836272042) internal successors, (2013), 799 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2013 transitions. [2022-11-18 20:02:19,481 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2013 transitions. Word has length 15 [2022-11-18 20:02:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:19,483 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 2013 transitions. [2022-11-18 20:02:19,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2013 transitions. [2022-11-18 20:02:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:02:19,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:19,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:19,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:19,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:19,699 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:02:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:19,700 INFO L85 PathProgramCache]: Analyzing trace with hash -999299948, now seen corresponding path program 1 times [2022-11-18 20:02:19,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:19,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735807238] [2022-11-18 20:02:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:02:19,700 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 [2022-11-18 20:02:19,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:19,701 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:02:19,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-18 20:02:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:02:19,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:02:19,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:19,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:02:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:20,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:22,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:22,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735807238] [2022-11-18 20:02:22,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735807238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:22,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:22,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:02:22,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587755798] [2022-11-18 20:02:22,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:22,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:02:22,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:22,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:02:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:02:22,649 INFO L87 Difference]: Start difference. First operand 800 states and 2013 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:32,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:02:38,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:02:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:43,484 INFO L93 Difference]: Finished difference Result 1518 states and 3886 transitions. [2022-11-18 20:02:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 20:02:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-18 20:02:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:43,489 INFO L225 Difference]: With dead ends: 1518 [2022-11-18 20:02:43,489 INFO L226 Difference]: Without dead ends: 1518 [2022-11-18 20:02:43,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:02:43,490 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 262 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:43,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 0 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 993 Invalid, 0 Unknown, 359 Unchecked, 15.1s Time] [2022-11-18 20:02:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-11-18 20:02:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1023. [2022-11-18 20:02:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1017 states have (on average 2.618485742379548) internal successors, (2663), 1022 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2663 transitions. [2022-11-18 20:02:43,518 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2663 transitions. Word has length 16 [2022-11-18 20:02:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:43,518 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 2663 transitions. [2022-11-18 20:02:43,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2663 transitions. [2022-11-18 20:02:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:02:43,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:43,520 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:43,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:43,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:43,733 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:02:43,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:43,733 INFO L85 PathProgramCache]: Analyzing trace with hash -144587940, now seen corresponding path program 2 times [2022-11-18 20:02:43,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:43,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768629223] [2022-11-18 20:02:43,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:02:43,734 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 [2022-11-18 20:02:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:43,734 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:02:43,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:02:43,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:02:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:43,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:02:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:43,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:02:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:44,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:46,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:46,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768629223] [2022-11-18 20:02:46,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768629223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:46,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:46,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:02:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58294998] [2022-11-18 20:02:46,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:46,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:02:46,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:02:46,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:02:46,719 INFO L87 Difference]: Start difference. First operand 1023 states and 2663 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:53,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:53,814 INFO L93 Difference]: Finished difference Result 1489 states and 3915 transitions. [2022-11-18 20:02:53,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:02:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-18 20:02:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:53,820 INFO L225 Difference]: With dead ends: 1489 [2022-11-18 20:02:53,821 INFO L226 Difference]: Without dead ends: 1489 [2022-11-18 20:02:53,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:02:53,822 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 186 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:53,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 0 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 611 Invalid, 0 Unknown, 134 Unchecked, 4.4s Time] [2022-11-18 20:02:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2022-11-18 20:02:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1056. [2022-11-18 20:02:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1050 states have (on average 2.656190476190476) internal successors, (2789), 1055 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2789 transitions. [2022-11-18 20:02:53,851 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2789 transitions. Word has length 16 [2022-11-18 20:02:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:53,851 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 2789 transitions. [2022-11-18 20:02:53,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2789 transitions. [2022-11-18 20:02:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:02:53,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:53,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:53,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:54,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:54,072 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:02:54,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash -310654936, now seen corresponding path program 3 times [2022-11-18 20:02:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:54,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619674500] [2022-11-18 20:02:54,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:02:54,073 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 [2022-11-18 20:02:54,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:54,075 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:02:54,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-18 20:02:54,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:02:54,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:54,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:02:54,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:02:54,531 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 38 treesize of output 34 [2022-11-18 20:02:54,636 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 51 treesize of output 19 [2022-11-18 20:02:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:02:54,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:02:54,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:54,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619674500] [2022-11-18 20:02:54,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619674500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:02:54,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:02:54,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:02:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718629723] [2022-11-18 20:02:54,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:02:54,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:02:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:02:54,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:02:54,689 INFO L87 Difference]: Start difference. First operand 1056 states and 2789 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:02:54,841 INFO L93 Difference]: Finished difference Result 701 states and 1700 transitions. [2022-11-18 20:02:54,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:02:54,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 20:02:54,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:02:54,844 INFO L225 Difference]: With dead ends: 701 [2022-11-18 20:02:54,844 INFO L226 Difference]: Without dead ends: 701 [2022-11-18 20:02:54,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:02:54,845 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:02:54,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-11-18 20:02:54,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-18 20:02:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 692. [2022-11-18 20:02:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 686 states have (on average 2.4591836734693877) internal successors, (1687), 691 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1687 transitions. [2022-11-18 20:02:54,854 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1687 transitions. Word has length 16 [2022-11-18 20:02:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:02:54,854 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1687 transitions. [2022-11-18 20:02:54,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:02:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1687 transitions. [2022-11-18 20:02:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:02:54,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:02:54,856 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:02:54,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-18 20:02:55,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:02:55,056 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:02:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:02:55,057 INFO L85 PathProgramCache]: Analyzing trace with hash 793939756, now seen corresponding path program 4 times [2022-11-18 20:02:55,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:02:55,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276401871] [2022-11-18 20:02:55,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:02:55,057 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 [2022-11-18 20:02:55,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:02:55,058 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:02:55,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-18 20:02:55,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:02:55,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:02:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:02:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:02:55,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:02:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:55,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:02:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:02:58,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:02:58,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276401871] [2022-11-18 20:02:58,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276401871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:02:58,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:02:58,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:02:58,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090212549] [2022-11-18 20:02:58,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:02:58,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:02:58,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:02:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:02:58,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:02:58,099 INFO L87 Difference]: Start difference. First operand 692 states and 1687 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:07,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:03:10,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:03:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:12,169 INFO L93 Difference]: Finished difference Result 1114 states and 2727 transitions. [2022-11-18 20:03:12,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:03:12,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-18 20:03:12,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:12,174 INFO L225 Difference]: With dead ends: 1114 [2022-11-18 20:03:12,175 INFO L226 Difference]: Without dead ends: 1114 [2022-11-18 20:03:12,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:03:12,175 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 282 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:12,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 0 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 937 Invalid, 0 Unknown, 532 Unchecked, 11.0s Time] [2022-11-18 20:03:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-11-18 20:03:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 771. [2022-11-18 20:03:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 765 states have (on average 2.488888888888889) internal successors, (1904), 770 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1904 transitions. [2022-11-18 20:03:12,196 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1904 transitions. Word has length 16 [2022-11-18 20:03:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:12,196 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1904 transitions. [2022-11-18 20:03:12,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1904 transitions. [2022-11-18 20:03:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:03:12,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:12,198 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:12,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-18 20:03:12,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:12,411 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:03:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:12,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1396220113, now seen corresponding path program 1 times [2022-11-18 20:03:12,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:12,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006116086] [2022-11-18 20:03:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:12,412 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 [2022-11-18 20:03:12,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:12,413 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:03:12,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:03:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:03:12,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:12,823 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-18 20:03:12,823 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-18 20:03:12,834 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 42 treesize of output 38 [2022-11-18 20:03:12,901 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:03:12,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:03:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:03:14,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:03:16,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006116086] [2022-11-18 20:03:16,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006116086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:16,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:16,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-18 20:03:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247382339] [2022-11-18 20:03:16,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:16,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:03:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:03:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:03:16,351 INFO L87 Difference]: Start difference. First operand 771 states and 1904 transitions. Second operand has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:21,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:21,994 INFO L93 Difference]: Finished difference Result 1117 states and 2733 transitions. [2022-11-18 20:03:21,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:03:21,996 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2022-11-18 20:03:21,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:22,004 INFO L225 Difference]: With dead ends: 1117 [2022-11-18 20:03:22,004 INFO L226 Difference]: Without dead ends: 1117 [2022-11-18 20:03:22,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=399, Invalid=861, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:03:22,005 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 402 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:22,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 34 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 411 Invalid, 0 Unknown, 274 Unchecked, 1.7s Time] [2022-11-18 20:03:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-11-18 20:03:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 772. [2022-11-18 20:03:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 766 states have (on average 2.4882506527415145) internal successors, (1906), 771 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:22,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 1906 transitions. [2022-11-18 20:03:22,016 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 1906 transitions. Word has length 16 [2022-11-18 20:03:22,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:22,017 INFO L495 AbstractCegarLoop]: Abstraction has 772 states and 1906 transitions. [2022-11-18 20:03:22,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:22,017 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 1906 transitions. [2022-11-18 20:03:22,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:03:22,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:22,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:22,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:03:22,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:22,219 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:03:22,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:22,219 INFO L85 PathProgramCache]: Analyzing trace with hash -962634138, now seen corresponding path program 1 times [2022-11-18 20:03:22,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:22,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603522172] [2022-11-18 20:03:22,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:22,220 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 [2022-11-18 20:03:22,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:22,221 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:03:22,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-18 20:03:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:22,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:03:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:03:22,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:03:22,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:22,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603522172] [2022-11-18 20:03:22,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603522172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:03:22,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:03:22,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:03:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960268713] [2022-11-18 20:03:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:03:22,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:03:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:03:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:03:22,433 INFO L87 Difference]: Start difference. First operand 772 states and 1906 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:22,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:22,642 INFO L93 Difference]: Finished difference Result 1013 states and 2585 transitions. [2022-11-18 20:03:22,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:03:22,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-11-18 20:03:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:22,646 INFO L225 Difference]: With dead ends: 1013 [2022-11-18 20:03:22,646 INFO L226 Difference]: Without dead ends: 966 [2022-11-18 20:03:22,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:03:22,647 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:22,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:03:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-11-18 20:03:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 856. [2022-11-18 20:03:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 850 states have (on average 2.62) internal successors, (2227), 855 states have internal predecessors, (2227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2227 transitions. [2022-11-18 20:03:22,661 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2227 transitions. Word has length 17 [2022-11-18 20:03:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:22,661 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 2227 transitions. [2022-11-18 20:03:22,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2227 transitions. [2022-11-18 20:03:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:03:22,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:22,663 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:22,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:22,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:22,876 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:03:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1937651657, now seen corresponding path program 1 times [2022-11-18 20:03:22,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:22,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709782747] [2022-11-18 20:03:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:22,877 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 [2022-11-18 20:03:22,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:22,877 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:03:22,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-18 20:03:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:03:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:23,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:03:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:23,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:25,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:25,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709782747] [2022-11-18 20:03:25,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709782747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:25,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:25,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:03:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415177977] [2022-11-18 20:03:25,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:25,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:03:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:03:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:03:25,820 INFO L87 Difference]: Start difference. First operand 856 states and 2227 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:32,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:03:35,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:35,378 INFO L93 Difference]: Finished difference Result 1450 states and 3778 transitions. [2022-11-18 20:03:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:03:35,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:03:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:35,382 INFO L225 Difference]: With dead ends: 1450 [2022-11-18 20:03:35,382 INFO L226 Difference]: Without dead ends: 1430 [2022-11-18 20:03:35,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:03:35,383 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:35,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 650 Invalid, 0 Unknown, 387 Unchecked, 6.7s Time] [2022-11-18 20:03:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-11-18 20:03:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 940. [2022-11-18 20:03:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 934 states have (on average 2.6531049250535332) internal successors, (2478), 939 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2478 transitions. [2022-11-18 20:03:35,416 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2478 transitions. Word has length 17 [2022-11-18 20:03:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:35,416 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 2478 transitions. [2022-11-18 20:03:35,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2478 transitions. [2022-11-18 20:03:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:03:35,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:35,418 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:35,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:35,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:35,631 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:03:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:35,632 INFO L85 PathProgramCache]: Analyzing trace with hash -333155465, now seen corresponding path program 1 times [2022-11-18 20:03:35,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:35,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579738542] [2022-11-18 20:03:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:35,632 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 [2022-11-18 20:03:35,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:35,633 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:03:35,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:03:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:03:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:03:36,076 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-18 20:03:36,076 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-18 20:03:36,090 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 [2022-11-18 20:03:36,166 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:03:36,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-18 20:03:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:03:37,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:03:39,678 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:39,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579738542] [2022-11-18 20:03:39,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579738542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:39,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:39,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-18 20:03:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273410403] [2022-11-18 20:03:39,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:39,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:03:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:03:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:03:39,682 INFO L87 Difference]: Start difference. First operand 940 states and 2478 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:44,224 INFO L93 Difference]: Finished difference Result 1408 states and 3585 transitions. [2022-11-18 20:03:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:03:44,225 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:03:44,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:44,227 INFO L225 Difference]: With dead ends: 1408 [2022-11-18 20:03:44,227 INFO L226 Difference]: Without dead ends: 1408 [2022-11-18 20:03:44,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=376, Invalid=814, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:03:44,228 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 312 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:44,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 30 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 391 Invalid, 0 Unknown, 401 Unchecked, 1.5s Time] [2022-11-18 20:03:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-11-18 20:03:44,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 935. [2022-11-18 20:03:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 935 states, 929 states have (on average 2.657696447793326) internal successors, (2469), 934 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:44,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 2469 transitions. [2022-11-18 20:03:44,255 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 2469 transitions. Word has length 17 [2022-11-18 20:03:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:44,256 INFO L495 AbstractCegarLoop]: Abstraction has 935 states and 2469 transitions. [2022-11-18 20:03:44,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 2469 transitions. [2022-11-18 20:03:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:03:44,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:44,258 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:44,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:44,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:44,463 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:03:44,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:44,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1370172258, now seen corresponding path program 1 times [2022-11-18 20:03:44,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:44,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932930188] [2022-11-18 20:03:44,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:44,463 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 [2022-11-18 20:03:44,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:44,464 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:03:44,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-18 20:03:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:03:44,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:44,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:03:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:45,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:47,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932930188] [2022-11-18 20:03:47,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932930188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:47,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:47,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:03:47,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317817137] [2022-11-18 20:03:47,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:47,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:03:47,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:03:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:03:47,562 INFO L87 Difference]: Start difference. First operand 935 states and 2469 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:03:56,229 INFO L93 Difference]: Finished difference Result 1257 states and 3224 transitions. [2022-11-18 20:03:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:03:56,231 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 20:03:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:03:56,233 INFO L225 Difference]: With dead ends: 1257 [2022-11-18 20:03:56,233 INFO L226 Difference]: Without dead ends: 1253 [2022-11-18 20:03:56,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:03:56,234 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 272 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:03:56,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 0 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 759 Invalid, 0 Unknown, 242 Unchecked, 6.4s Time] [2022-11-18 20:03:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2022-11-18 20:03:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 941. [2022-11-18 20:03:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 935 states have (on average 2.653475935828877) internal successors, (2481), 940 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2481 transitions. [2022-11-18 20:03:56,249 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2481 transitions. Word has length 18 [2022-11-18 20:03:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:03:56,249 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 2481 transitions. [2022-11-18 20:03:56,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2481 transitions. [2022-11-18 20:03:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:03:56,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:03:56,252 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:56,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:56,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:03:56,465 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:03:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash 507070713, now seen corresponding path program 1 times [2022-11-18 20:03:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:03:56,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320935004] [2022-11-18 20:03:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:56,466 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 [2022-11-18 20:03:56,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:03:56,467 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:03:56,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-18 20:03:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:56,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:03:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:56,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:03:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:57,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:59,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:03:59,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320935004] [2022-11-18 20:03:59,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320935004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:59,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:03:59,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:03:59,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450326101] [2022-11-18 20:03:59,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:59,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:03:59,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:03:59,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:03:59,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:03:59,475 INFO L87 Difference]: Start difference. First operand 941 states and 2481 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:04:00,653 INFO L93 Difference]: Finished difference Result 1245 states and 3251 transitions. [2022-11-18 20:04:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:04:00,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 20:04:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:04:00,656 INFO L225 Difference]: With dead ends: 1245 [2022-11-18 20:04:00,656 INFO L226 Difference]: Without dead ends: 1245 [2022-11-18 20:04:00,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:04:00,657 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:04:00,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 67 Unchecked, 0.6s Time] [2022-11-18 20:04:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2022-11-18 20:04:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 946. [2022-11-18 20:04:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 940 states have (on average 2.654255319148936) internal successors, (2495), 945 states have internal predecessors, (2495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2495 transitions. [2022-11-18 20:04:00,680 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2495 transitions. Word has length 18 [2022-11-18 20:04:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:04:00,680 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 2495 transitions. [2022-11-18 20:04:00,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2495 transitions. [2022-11-18 20:04:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:04:00,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:04:00,682 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-18 20:04:00,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-18 20:04:00,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:04:00,891 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:04:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:04:00,892 INFO L85 PathProgramCache]: Analyzing trace with hash -855211732, now seen corresponding path program 5 times [2022-11-18 20:04:00,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:04:00,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816815929] [2022-11-18 20:04:00,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:04:00,892 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 [2022-11-18 20:04:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:04:00,893 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:04:00,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:04:01,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:04:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:04:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:04:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:04:01,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:04:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:04:01,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:04:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:04:04,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:04:04,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816815929] [2022-11-18 20:04:04,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816815929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:04:04,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:04:04,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-18 20:04:04,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491781632] [2022-11-18 20:04:04,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:04:04,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:04:04,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:04:04,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:04:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:04:04,526 INFO L87 Difference]: Start difference. First operand 946 states and 2495 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:07,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:13,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:15,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:17,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:19,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:21,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:31,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:33,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:34,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:36,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:38,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:42,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:43,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:45,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:47,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:49,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:04:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:04:50,144 INFO L93 Difference]: Finished difference Result 2668 states and 7107 transitions. [2022-11-18 20:04:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 20:04:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 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 18 [2022-11-18 20:04:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:04:50,152 INFO L225 Difference]: With dead ends: 2668 [2022-11-18 20:04:50,152 INFO L226 Difference]: Without dead ends: 2668 [2022-11-18 20:04:50,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=551, Invalid=1341, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:04:50,153 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 640 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 47 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 34.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:04:50,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 0 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 937 Invalid, 8 Unknown, 181 Unchecked, 34.0s Time] [2022-11-18 20:04:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2022-11-18 20:04:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 1456. [2022-11-18 20:04:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1450 states have (on average 2.7524137931034485) internal successors, (3991), 1455 states have internal predecessors, (3991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3991 transitions. [2022-11-18 20:04:50,197 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3991 transitions. Word has length 18 [2022-11-18 20:04:50,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:04:50,197 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 3991 transitions. [2022-11-18 20:04:50,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3991 transitions. [2022-11-18 20:04:50,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:04:50,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:04:50,200 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1] [2022-11-18 20:04:50,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:04:50,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:04:50,413 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:04:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:04:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash 635566795, now seen corresponding path program 2 times [2022-11-18 20:04:50,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:04:50,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552896203] [2022-11-18 20:04:50,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:04:50,414 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 [2022-11-18 20:04:50,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:04:50,415 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:04:50,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:04:50,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:04:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:04:50,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:04:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:04:50,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:04:51,749 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:04:51,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:04:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:04:59,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:04:59,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552896203] [2022-11-18 20:04:59,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552896203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:04:59,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:04:59,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-11-18 20:04:59,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863769578] [2022-11-18 20:04:59,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:04:59,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:04:59,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:04:59,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:04:59,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:04:59,282 INFO L87 Difference]: Start difference. First operand 1456 states and 3991 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:20,707 WARN L233 SmtUtils]: Spent 12.73s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:05:23,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:25,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:27,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:29,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:31,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:33,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:35,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:37,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:39,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:41,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:43,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:45,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:47,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:49,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:51,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:05:53,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:06:01,373 WARN L233 SmtUtils]: Spent 6.92s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:06:09,574 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:06:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:57,197 INFO L93 Difference]: Finished difference Result 27829 states and 76147 transitions. [2022-11-18 20:06:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:06:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 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 19 [2022-11-18 20:06:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:57,328 INFO L225 Difference]: With dead ends: 27829 [2022-11-18 20:06:57,329 INFO L226 Difference]: Without dead ends: 27829 [2022-11-18 20:06:57,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 68.3s TimeCoverageRelationStatistics Valid=934, Invalid=1718, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:06:57,331 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5466 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 6154 mSolverCounterSat, 471 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5466 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 6641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 6154 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:57,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5466 Valid, 287 Invalid, 6641 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [471 Valid, 6154 Invalid, 16 Unknown, 0 Unchecked, 56.9s Time] [2022-11-18 20:06:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27829 states. [2022-11-18 20:06:57,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27829 to 1492. [2022-11-18 20:06:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1486 states have (on average 2.734185733512786) internal successors, (4063), 1491 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4063 transitions. [2022-11-18 20:06:57,753 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4063 transitions. Word has length 19 [2022-11-18 20:06:57,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:57,754 INFO L495 AbstractCegarLoop]: Abstraction has 1492 states and 4063 transitions. [2022-11-18 20:06:57,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4063 transitions. [2022-11-18 20:06:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:06:57,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:57,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:57,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:06:57,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:57,970 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:06:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:57,971 INFO L85 PathProgramCache]: Analyzing trace with hash 351444666, now seen corresponding path program 1 times [2022-11-18 20:06:57,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:06:57,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478917948] [2022-11-18 20:06:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:57,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:57,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:06:57,972 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:06:57,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-18 20:06:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:06:58,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:06:58,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:06:58,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:06:58,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478917948] [2022-11-18 20:06:58,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478917948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:06:58,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:06:58,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:06:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836105052] [2022-11-18 20:06:58,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:06:58,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:06:58,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:06:58,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:06:58,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:06:58,230 INFO L87 Difference]: Start difference. First operand 1492 states and 4063 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2022-11-18 20:06:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:58,441 INFO L93 Difference]: Finished difference Result 1543 states and 4141 transitions. [2022-11-18 20:06:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:06:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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 19 [2022-11-18 20:06:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:58,445 INFO L225 Difference]: With dead ends: 1543 [2022-11-18 20:06:58,445 INFO L226 Difference]: Without dead ends: 1529 [2022-11-18 20:06:58,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:06:58,446 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:58,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:06:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-11-18 20:06:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1486. [2022-11-18 20:06:58,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1480 states have (on average 2.687162162162162) internal successors, (3977), 1485 states have internal predecessors, (3977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 3977 transitions. [2022-11-18 20:06:58,494 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 3977 transitions. Word has length 19 [2022-11-18 20:06:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:58,494 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 3977 transitions. [2022-11-18 20:06:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 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) [2022-11-18 20:06:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 3977 transitions. [2022-11-18 20:06:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:06:58,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:58,497 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:58,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:58,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:06:58,713 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:06:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:58,717 INFO L85 PathProgramCache]: Analyzing trace with hash -577296412, now seen corresponding path program 1 times [2022-11-18 20:06:58,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:06:58,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896791785] [2022-11-18 20:06:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:58,718 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 [2022-11-18 20:06:58,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:06:58,719 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:06:58,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-18 20:06:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:06:58,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:58,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:06:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:06:59,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:07:02,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:07:02,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896791785] [2022-11-18 20:07:02,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896791785] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:07:02,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:07:02,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:07:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276587642] [2022-11-18 20:07:02,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:02,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:07:02,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:07:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:07:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:07:02,021 INFO L87 Difference]: Start difference. First operand 1486 states and 3977 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:11,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:07:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:16,417 INFO L93 Difference]: Finished difference Result 2212 states and 5844 transitions. [2022-11-18 20:07:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:07:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-18 20:07:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:16,422 INFO L225 Difference]: With dead ends: 2212 [2022-11-18 20:07:16,422 INFO L226 Difference]: Without dead ends: 2212 [2022-11-18 20:07:16,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:07:16,423 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 302 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:16,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 1 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 989 Invalid, 0 Unknown, 285 Unchecked, 10.7s Time] [2022-11-18 20:07:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2022-11-18 20:07:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1606. [2022-11-18 20:07:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1600 states have (on average 2.694375) internal successors, (4311), 1605 states have internal predecessors, (4311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:16,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 4311 transitions. [2022-11-18 20:07:16,470 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 4311 transitions. Word has length 20 [2022-11-18 20:07:16,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:16,470 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 4311 transitions. [2022-11-18 20:07:16,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:16,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 4311 transitions. [2022-11-18 20:07:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:07:16,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:16,473 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:16,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:16,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:16,687 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:07:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1089699940, now seen corresponding path program 2 times [2022-11-18 20:07:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:07:16,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685215556] [2022-11-18 20:07:16,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:07:16,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:16,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:07:16,688 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:07:16,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:07:16,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:07:16,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:07:16,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:07:16,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:16,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-18 20:07:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:07:17,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:07:20,040 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:07:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685215556] [2022-11-18 20:07:20,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685215556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:07:20,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:07:20,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2022-11-18 20:07:20,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545075759] [2022-11-18 20:07:20,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:20,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:07:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:07:20,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:07:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:07:20,042 INFO L87 Difference]: Start difference. First operand 1606 states and 4311 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:34,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:34,408 INFO L93 Difference]: Finished difference Result 2405 states and 6402 transitions. [2022-11-18 20:07:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:07:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-18 20:07:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:34,414 INFO L225 Difference]: With dead ends: 2405 [2022-11-18 20:07:34,414 INFO L226 Difference]: Without dead ends: 2403 [2022-11-18 20:07:34,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:07:34,414 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 324 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:34,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 1 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 823 Invalid, 0 Unknown, 199 Unchecked, 11.2s Time] [2022-11-18 20:07:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2022-11-18 20:07:34,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 1597. [2022-11-18 20:07:34,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1591 states have (on average 2.694531741043369) internal successors, (4287), 1596 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 4287 transitions. [2022-11-18 20:07:34,452 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 4287 transitions. Word has length 20 [2022-11-18 20:07:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:34,452 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 4287 transitions. [2022-11-18 20:07:34,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:34,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 4287 transitions. [2022-11-18 20:07:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:07:34,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:34,454 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] [2022-11-18 20:07:34,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:34,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:07:34,655 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2022-11-18 20:07:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1199026914, now seen corresponding path program 1 times [2022-11-18 20:07:34,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:07:34,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174800117] [2022-11-18 20:07:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:34,656 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 [2022-11-18 20:07:34,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:07:34,657 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:07:34,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55cee756-76df-4916-bbe1-89754b8f9b66/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Waiting until timeout for monitored process [2022-11-18 20:07:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:35,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:07:35,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:35,018 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 [2022-11-18 20:07:35,109 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:07:35,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 9 [2022-11-18 20:07:41,779 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 20:07:41,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 125 [2022-11-18 20:07:41,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:07:41,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 60 [2022-11-18 20:07:44,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:07:44,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 56 [2022-11-18 20:07:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:07:44,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:56,405 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 391 DAG size of output: 343 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-18 20:07:56,415 INFO L321 Elim1Store]: treesize reduction 168, result has 89.4 percent of original size [2022-11-18 20:07:56,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 314 treesize of output 1520 [2022-11-18 20:07:56,566 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 93 treesize of output 66