./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN --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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:27:07,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:07,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:07,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:07,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:07,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:07,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:07,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:07,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:07,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:07,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:07,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:07,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:07,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:07,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:07,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:07,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:07,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:07,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:07,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:07,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:07,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:07,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:07,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:07,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:07,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:07,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:07,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:07,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:07,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:07,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:07,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:07,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:07,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:07,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:07,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:07,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:07,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:07,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:07,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:07,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:07,942 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 09:27:07,963 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:07,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:07,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:07,965 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:07,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:07,966 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:07,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:07,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:07,967 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:07,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:07,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:07,968 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:27:07,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:07,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:07,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:07,970 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:27:07,970 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:27:07,970 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:27:07,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:07,971 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:27:07,971 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:07,971 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:07,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:07,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:07,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:07,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:07,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:07,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:07,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:07,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:07,974 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_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-11-20 09:27:08,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:08,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:08,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:08,257 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:08,258 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:08,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-20 09:27:11,376 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:11,615 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:11,616 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-20 09:27:11,625 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data/34dbcca84/64df4e3595c1495ab00cfabf22471721/FLAG20f63031b [2022-11-20 09:27:11,640 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data/34dbcca84/64df4e3595c1495ab00cfabf22471721 [2022-11-20 09:27:11,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:11,644 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:11,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:11,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:11,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:11,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f133dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11, skipping insertion in model container [2022-11-20 09:27:11,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:11" (1/1) ... [2022-11-20 09:27:11,659 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:11,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:11,858 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-20 09:27:11,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:11,880 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) [2022-11-20 09:27:11,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1c25196c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:11, skipping insertion in model container [2022-11-20 09:27:11,881 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:11,882 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 09:27:11,884 INFO L158 Benchmark]: Toolchain (without parser) took 238.85ms. Allocated memory is still 144.7MB. Free memory was 113.7MB in the beginning and 103.8MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 09:27:11,884 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 144.7MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 09:27:11,885 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.50ms. Allocated memory is still 144.7MB. Free memory was 113.3MB in the beginning and 103.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 09:27:11,886 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 144.7MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.50ms. Allocated memory is still 144.7MB. Free memory was 113.3MB in the beginning and 103.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN --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 ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 09:27:14,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:14,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:14,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:14,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:14,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:14,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:14,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:14,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:14,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:14,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:14,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:14,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:14,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:14,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:14,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:14,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:14,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:14,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:14,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:14,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:14,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:14,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:14,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:14,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:14,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:14,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:14,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:14,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:14,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:14,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:14,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:14,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:14,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:14,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:14,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:14,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:14,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:14,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:14,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:14,346 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:14,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 09:27:14,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:14,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:14,373 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:14,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:14,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:14,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:14,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:14,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:14,380 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:14,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:14,382 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:14,382 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:27:14,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:14,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:14,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:14,383 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 09:27:14,383 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 09:27:14,384 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 09:27:14,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:14,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 09:27:14,385 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 09:27:14,385 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 09:27:14,385 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:14,386 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:14,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:14,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:14,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:14,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:14,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:14,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:14,388 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 09:27:14,388 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 09:27:14,389 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 09:27:14,389 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_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb4cfb737a49cea9ea1be451c16ebb29f48ae611a8c94fc546ca2e3471f0eb3 [2022-11-20 09:27:14,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:14,850 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:14,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:14,855 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:14,855 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:14,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-20 09:27:18,267 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:18,587 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:18,588 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2022-11-20 09:27:18,604 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data/d4bca0a3f/4d4014197c964ca5b3b4cc23e35c1ad3/FLAGff3038ea1 [2022-11-20 09:27:18,643 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/data/d4bca0a3f/4d4014197c964ca5b3b4cc23e35c1ad3 [2022-11-20 09:27:18,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:18,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:18,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:18,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:18,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:18,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:18" (1/1) ... [2022-11-20 09:27:18,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15cfdb52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:18, skipping insertion in model container [2022-11-20 09:27:18,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:18" (1/1) ... [2022-11-20 09:27:18,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:18,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:18,883 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-20 09:27:18,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:18,906 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 09:27:18,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:18,924 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-20 09:27:18,928 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:18,951 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:19,002 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c[2586,2599] [2022-11-20 09:27:19,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:19,031 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:19,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19 WrapperNode [2022-11-20 09:27:19,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:19,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:19,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:19,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:19,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,100 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-11-20 09:27:19,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:19,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:19,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:19,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:19,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,160 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:19,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:19,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:19,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:19,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (1/1) ... [2022-11-20 09:27:19,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:19,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:19,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:19,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 09:27:19,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:27:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 09:27:19,266 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 09:27:19,266 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 09:27:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 09:27:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 09:27:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 09:27:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 09:27:19,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 09:27:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 09:27:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 09:27:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:19,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 09:27:19,270 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:27:19,436 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:19,438 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:20,055 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:20,252 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:20,252 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 09:27:20,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:20 BoogieIcfgContainer [2022-11-20 09:27:20,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:20,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:20,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:20,271 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:20,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:18" (1/3) ... [2022-11-20 09:27:20,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252d5b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:20, skipping insertion in model container [2022-11-20 09:27:20,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:19" (2/3) ... [2022-11-20 09:27:20,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252d5b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:20, skipping insertion in model container [2022-11-20 09:27:20,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:20" (3/3) ... [2022-11-20 09:27:20,274 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2022-11-20 09:27:20,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:20,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-20 09:27:20,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:27:20,414 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 09:27:20,447 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 09:27:20,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-20 09:27:20,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-20 09:27:20,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-11-20 09:27:20,578 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-11-20 09:27:20,579 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 09:27:20,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 178 events. 12/178 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 127. Up to 2 conditions per place. [2022-11-20 09:27:20,594 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-20 09:27:50,948 INFO L134 LiptonReduction]: Checked pairs total: 3576 [2022-11-20 09:27:50,949 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-11-20 09:27:50,957 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-11-20 09:27:51,108 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:51,136 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;@5ec04642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:51,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-20 09:27:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:27:51,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:51,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:27:51,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:51,163 INFO L85 PathProgramCache]: Analyzing trace with hash 23267, now seen corresponding path program 1 times [2022-11-20 09:27:51,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472434798] [2022-11-20 09:27:51,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:51,175 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 [2022-11-20 09:27:51,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:51,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:51,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:51,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:27:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:51,415 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 09:27:51,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 09:27:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:51,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:51,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:51,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472434798] [2022-11-20 09:27:51,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472434798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:51,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:51,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:27:51,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908718941] [2022-11-20 09:27:51,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:51,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:51,479 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:51,699 INFO L93 Difference]: Finished difference Result 748 states and 2564 transitions. [2022-11-20 09:27:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:51,701 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 [2022-11-20 09:27:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:51,719 INFO L225 Difference]: With dead ends: 748 [2022-11-20 09:27:51,719 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 09:27:51,720 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 [2022-11-20 09:27:51,723 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:51,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:27:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 09:27:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-20 09:27:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 616 states have (on average 4.162337662337662) internal successors, (2564), 747 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2564 transitions. [2022-11-20 09:27:51,813 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2564 transitions. Word has length 2 [2022-11-20 09:27:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:51,814 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2564 transitions. [2022-11-20 09:27:51,816 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) [2022-11-20 09:27:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2564 transitions. [2022-11-20 09:27:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:27:51,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:51,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:27:51,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:52,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:52,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash 23268, now seen corresponding path program 1 times [2022-11-20 09:27:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:52,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1593343443] [2022-11-20 09:27:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:52,035 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 [2022-11-20 09:27:52,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:52,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:52,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:52,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:27:52,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:52,324 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:27:52,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:27:52,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:52,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:52,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:52,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1593343443] [2022-11-20 09:27:52,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1593343443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:52,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:52,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:27:52,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297108306] [2022-11-20 09:27:52,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:52,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:52,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:52,365 INFO L87 Difference]: Start difference. First operand 748 states and 2564 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) [2022-11-20 09:27:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:52,763 INFO L93 Difference]: Finished difference Result 1494 states and 5126 transitions. [2022-11-20 09:27:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:52,764 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 [2022-11-20 09:27:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:52,775 INFO L225 Difference]: With dead ends: 1494 [2022-11-20 09:27:52,775 INFO L226 Difference]: Without dead ends: 1494 [2022-11-20 09:27:52,776 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 [2022-11-20 09:27:52,782 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:52,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:27:52,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-20 09:27:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 749. [2022-11-20 09:27:52,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 748 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2568 transitions. [2022-11-20 09:27:52,841 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2568 transitions. Word has length 2 [2022-11-20 09:27:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:52,841 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2568 transitions. [2022-11-20 09:27:52,842 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) [2022-11-20 09:27:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2568 transitions. [2022-11-20 09:27:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 09:27:52,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:52,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 09:27:52,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:53,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:53,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:53,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:53,046 INFO L85 PathProgramCache]: Analyzing trace with hash 23423, now seen corresponding path program 1 times [2022-11-20 09:27:53,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:53,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179687672] [2022-11-20 09:27:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:53,047 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 [2022-11-20 09:27:53,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:53,048 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:53,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 09:27:53,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:53,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:53,230 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179687672] [2022-11-20 09:27:53,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179687672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:53,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:53,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:27:53,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943863022] [2022-11-20 09:27:53,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:53,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:53,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:53,233 INFO L87 Difference]: Start difference. First operand 749 states and 2568 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) [2022-11-20 09:27:53,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:53,544 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-20 09:27:53,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:53,545 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 [2022-11-20 09:27:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:53,551 INFO L225 Difference]: With dead ends: 749 [2022-11-20 09:27:53,551 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 09:27:53,552 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 [2022-11-20 09:27:53,554 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:53,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:27:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 09:27:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-20 09:27:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-20 09:27:53,594 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-20 09:27:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:53,595 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-20 09:27:53,595 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) [2022-11-20 09:27:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-20 09:27:53,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 09:27:53,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:53,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 09:27:53,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:53,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:53,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 725604, now seen corresponding path program 1 times [2022-11-20 09:27:53,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:53,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649988458] [2022-11-20 09:27:53,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:53,809 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 [2022-11-20 09:27:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:53,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:53,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:53,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:27:53,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:54,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:27:54,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:27:54,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:54,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:54,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:54,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649988458] [2022-11-20 09:27:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649988458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:54,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:54,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 09:27:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932926017] [2022-11-20 09:27:54,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:27:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:27:54,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:27:54,336 INFO L87 Difference]: Start difference. First operand 749 states and 2565 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) [2022-11-20 09:27:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:55,214 INFO L93 Difference]: Finished difference Result 1497 states and 5135 transitions. [2022-11-20 09:27:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:27:55,217 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 [2022-11-20 09:27:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:55,229 INFO L225 Difference]: With dead ends: 1497 [2022-11-20 09:27:55,229 INFO L226 Difference]: Without dead ends: 1497 [2022-11-20 09:27:55,230 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 [2022-11-20 09:27:55,232 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 163 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:55,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 9 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:27:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-11-20 09:27:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 752. [2022-11-20 09:27:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 620 states have (on average 4.156451612903226) internal successors, (2577), 751 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2577 transitions. [2022-11-20 09:27:55,270 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2577 transitions. Word has length 3 [2022-11-20 09:27:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:55,271 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2577 transitions. [2022-11-20 09:27:55,271 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) [2022-11-20 09:27:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2577 transitions. [2022-11-20 09:27:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 09:27:55,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:55,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 09:27:55,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:55,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:55,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:55,484 INFO L85 PathProgramCache]: Analyzing trace with hash 725759, now seen corresponding path program 1 times [2022-11-20 09:27:55,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:55,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302344082] [2022-11-20 09:27:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:55,485 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 [2022-11-20 09:27:55,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:55,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:55,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:27:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:55,694 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-20 09:27:55,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-20 09:27:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:55,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:55,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:55,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302344082] [2022-11-20 09:27:55,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302344082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:55,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:55,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:27:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449962552] [2022-11-20 09:27:55,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:55,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:55,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:55,794 INFO L87 Difference]: Start difference. First operand 752 states and 2577 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:55,942 INFO L93 Difference]: Finished difference Result 751 states and 2573 transitions. [2022-11-20 09:27:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 09:27:55,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:55,948 INFO L225 Difference]: With dead ends: 751 [2022-11-20 09:27:55,948 INFO L226 Difference]: Without dead ends: 751 [2022-11-20 09:27:55,948 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 [2022-11-20 09:27:55,949 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:55,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-20 09:27:55,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-20 09:27:55,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-20 09:27:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 620 states have (on average 4.15) internal successors, (2573), 750 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2573 transitions. [2022-11-20 09:27:55,977 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2573 transitions. Word has length 3 [2022-11-20 09:27:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:55,977 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2573 transitions. [2022-11-20 09:27:55,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:55,978 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2573 transitions. [2022-11-20 09:27:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 09:27:55,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:55,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 09:27:55,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:56,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:56,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:56,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash 725760, now seen corresponding path program 1 times [2022-11-20 09:27:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:56,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127463118] [2022-11-20 09:27:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:56,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:56,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:56,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:56,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:56,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:27:56,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:56,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:27:56,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:27:56,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:27:56,414 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 09:27:56,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-20 09:27:56,442 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 09:27:56,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 09:27:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:56,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:56,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:56,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127463118] [2022-11-20 09:27:56,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127463118] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:56,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:56,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-20 09:27:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566007221] [2022-11-20 09:27:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:56,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:27:56,667 INFO L87 Difference]: Start difference. First operand 751 states and 2573 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:56,899 INFO L93 Difference]: Finished difference Result 625 states and 2069 transitions. [2022-11-20 09:27:56,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:56,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 09:27:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:56,904 INFO L225 Difference]: With dead ends: 625 [2022-11-20 09:27:56,904 INFO L226 Difference]: Without dead ends: 625 [2022-11-20 09:27:56,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 09:27:56,905 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:56,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:27:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-20 09:27:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2022-11-20 09:27:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 522 states have (on average 3.9636015325670497) internal successors, (2069), 624 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2069 transitions. [2022-11-20 09:27:56,928 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2069 transitions. Word has length 3 [2022-11-20 09:27:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:56,929 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 2069 transitions. [2022-11-20 09:27:56,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2069 transitions. [2022-11-20 09:27:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 09:27:56,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:56,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 09:27:56,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:57,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:57,143 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:57,143 INFO L85 PathProgramCache]: Analyzing trace with hash 697470199, now seen corresponding path program 1 times [2022-11-20 09:27:57,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:57,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894412628] [2022-11-20 09:27:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,144 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 [2022-11-20 09:27:57,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:57,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:57,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:27:57,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:27:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:27:57,385 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-20 09:27:57,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-20 09:27:57,399 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 [2022-11-20 09:27:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:57,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894412628] [2022-11-20 09:27:57,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894412628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:57,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:57,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:27:57,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802102182] [2022-11-20 09:27:57,916 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:57,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:27:57,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:57,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:27:57,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:27:57,917 INFO L87 Difference]: Start difference. First operand 625 states and 2069 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) [2022-11-20 09:27:58,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:58,485 INFO L93 Difference]: Finished difference Result 631 states and 2089 transitions. [2022-11-20 09:27:58,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:27:58,487 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 [2022-11-20 09:27:58,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:58,491 INFO L225 Difference]: With dead ends: 631 [2022-11-20 09:27:58,491 INFO L226 Difference]: Without dead ends: 631 [2022-11-20 09:27:58,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:27:58,492 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:58,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2022-11-20 09:27:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-20 09:27:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 628. [2022-11-20 09:27:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.96) internal successors, (2079), 627 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2079 transitions. [2022-11-20 09:27:58,516 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2079 transitions. Word has length 5 [2022-11-20 09:27:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:58,517 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2079 transitions. [2022-11-20 09:27:58,517 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) [2022-11-20 09:27:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2079 transitions. [2022-11-20 09:27:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 09:27:58,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:58,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 09:27:58,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:58,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:58,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:58,730 INFO L85 PathProgramCache]: Analyzing trace with hash 697470198, now seen corresponding path program 1 times [2022-11-20 09:27:58,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:58,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168017382] [2022-11-20 09:27:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,730 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 [2022-11-20 09:27:58,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:58,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:58,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:27:58,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:58,908 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 09:27:58,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-20 09:27:59,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:27:59,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:59,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:27:59,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168017382] [2022-11-20 09:27:59,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168017382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:59,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:59,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:27:59,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496612458] [2022-11-20 09:27:59,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:59,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:59,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:27:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:59,027 INFO L87 Difference]: Start difference. First operand 628 states and 2079 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) [2022-11-20 09:27:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:59,139 INFO L93 Difference]: Finished difference Result 628 states and 2081 transitions. [2022-11-20 09:27:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:59,140 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 [2022-11-20 09:27:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:59,144 INFO L225 Difference]: With dead ends: 628 [2022-11-20 09:27:59,144 INFO L226 Difference]: Without dead ends: 628 [2022-11-20 09:27:59,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:59,145 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:59,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-20 09:27:59,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-20 09:27:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-11-20 09:27:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 525 states have (on average 3.9638095238095237) internal successors, (2081), 627 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2081 transitions. [2022-11-20 09:27:59,167 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2081 transitions. Word has length 5 [2022-11-20 09:27:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:59,168 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2081 transitions. [2022-11-20 09:27:59,168 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) [2022-11-20 09:27:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2081 transitions. [2022-11-20 09:27:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:27:59,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:59,169 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 09:27:59,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:59,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:27:59,386 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:27:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash 145898212, now seen corresponding path program 2 times [2022-11-20 09:27:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:27:59,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2008205981] [2022-11-20 09:27:59,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:59,388 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 [2022-11-20 09:27:59,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:27:59,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:27:59,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:27:59,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:27:59,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 09:27:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:59,651 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:27:59,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:27:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:59,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:00,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:00,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:00,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2008205981] [2022-11-20 09:28:00,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2008205981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:00,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:00,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:28:00,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923176475] [2022-11-20 09:28:00,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:00,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:28:00,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:28:00,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:28:00,506 INFO L87 Difference]: Start difference. First operand 628 states and 2081 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) [2022-11-20 09:28:05,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:05,618 INFO L93 Difference]: Finished difference Result 5573 states and 18575 transitions. [2022-11-20 09:28:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:28:05,620 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 [2022-11-20 09:28:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:05,658 INFO L225 Difference]: With dead ends: 5573 [2022-11-20 09:28:05,658 INFO L226 Difference]: Without dead ends: 5573 [2022-11-20 09:28:05,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:28:05,659 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 962 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:05,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 72 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-20 09:28:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2022-11-20 09:28:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 634. [2022-11-20 09:28:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 531 states have (on average 3.9416195856873824) internal successors, (2093), 633 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 2093 transitions. [2022-11-20 09:28:05,771 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 2093 transitions. Word has length 6 [2022-11-20 09:28:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:05,771 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 2093 transitions. [2022-11-20 09:28:05,772 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) [2022-11-20 09:28:05,772 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 2093 transitions. [2022-11-20 09:28:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:28:05,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:05,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:28:05,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:05,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:05,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:05,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash 146734139, now seen corresponding path program 1 times [2022-11-20 09:28:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:05,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73439633] [2022-11-20 09:28:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:05,986 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 [2022-11-20 09:28:05,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:05,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:05,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:06,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:06,175 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 09:28:06,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-20 09:28:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:06,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:06,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73439633] [2022-11-20 09:28:06,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73439633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:06,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:06,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:06,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629750240] [2022-11-20 09:28:06,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:06,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:06,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:06,207 INFO L87 Difference]: Start difference. First operand 634 states and 2093 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) [2022-11-20 09:28:06,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:06,422 INFO L93 Difference]: Finished difference Result 371 states and 1188 transitions. [2022-11-20 09:28:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:06,422 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 [2022-11-20 09:28:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:06,425 INFO L225 Difference]: With dead ends: 371 [2022-11-20 09:28:06,425 INFO L226 Difference]: Without dead ends: 371 [2022-11-20 09:28:06,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:28:06,426 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:06,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:28:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-20 09:28:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-20 09:28:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 330 states have (on average 3.6) internal successors, (1188), 370 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1188 transitions. [2022-11-20 09:28:06,445 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1188 transitions. Word has length 6 [2022-11-20 09:28:06,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:06,445 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 1188 transitions. [2022-11-20 09:28:06,445 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) [2022-11-20 09:28:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1188 transitions. [2022-11-20 09:28:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 09:28:06,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:06,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 09:28:06,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:06,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:06,667 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:06,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:06,668 INFO L85 PathProgramCache]: Analyzing trace with hash 146734140, now seen corresponding path program 1 times [2022-11-20 09:28:06,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:06,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277163555] [2022-11-20 09:28:06,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:06,668 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 [2022-11-20 09:28:06,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:06,669 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:06,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:06,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:28:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:06,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:07,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 09:28:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:07,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:07,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277163555] [2022-11-20 09:28:07,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277163555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:07,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:07,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:07,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782069368] [2022-11-20 09:28:07,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:07,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:07,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:07,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:07,108 INFO L87 Difference]: Start difference. First operand 371 states and 1188 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2022-11-20 09:28:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:08,240 INFO L93 Difference]: Finished difference Result 1156 states and 3704 transitions. [2022-11-20 09:28:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:08,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 [2022-11-20 09:28:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:08,248 INFO L225 Difference]: With dead ends: 1156 [2022-11-20 09:28:08,248 INFO L226 Difference]: Without dead ends: 1156 [2022-11-20 09:28:08,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:08,249 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 386 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:08,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 19 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 09:28:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-11-20 09:28:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 437. [2022-11-20 09:28:08,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 396 states have (on average 3.734848484848485) internal successors, (1479), 436 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:08,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1479 transitions. [2022-11-20 09:28:08,271 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1479 transitions. Word has length 6 [2022-11-20 09:28:08,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:08,271 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1479 transitions. [2022-11-20 09:28:08,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) [2022-11-20 09:28:08,272 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1479 transitions. [2022-11-20 09:28:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:28:08,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:08,272 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 09:28:08,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:08,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:08,485 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:08,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash 227908855, now seen corresponding path program 2 times [2022-11-20 09:28:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:08,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1299308335] [2022-11-20 09:28:08,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:08,487 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 [2022-11-20 09:28:08,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:08,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:08,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:08,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:28:08,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:28:08,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:08,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:08,731 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-20 09:28:08,731 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-20 09:28:08,745 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 [2022-11-20 09:28:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:08,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:08,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:08,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1299308335] [2022-11-20 09:28:08,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1299308335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:08,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:09,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:09,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189599310] [2022-11-20 09:28:09,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:09,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:09,001 INFO L87 Difference]: Start difference. First operand 437 states and 1479 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) [2022-11-20 09:28:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:09,105 INFO L93 Difference]: Finished difference Result 435 states and 1474 transitions. [2022-11-20 09:28:09,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:09,106 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 [2022-11-20 09:28:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:09,108 INFO L225 Difference]: With dead ends: 435 [2022-11-20 09:28:09,108 INFO L226 Difference]: Without dead ends: 435 [2022-11-20 09:28:09,109 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 [2022-11-20 09:28:09,109 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:09,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 60 Unchecked, 0.1s Time] [2022-11-20 09:28:09,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-20 09:28:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 432. [2022-11-20 09:28:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 391 states have (on average 3.7544757033248084) internal successors, (1468), 431 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:09,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1468 transitions. [2022-11-20 09:28:09,123 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1468 transitions. Word has length 7 [2022-11-20 09:28:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:09,124 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1468 transitions. [2022-11-20 09:28:09,124 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) [2022-11-20 09:28:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1468 transitions. [2022-11-20 09:28:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:28:09,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:09,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:09,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:09,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:09,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash 253793607, now seen corresponding path program 1 times [2022-11-20 09:28:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:09,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732399767] [2022-11-20 09:28:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:09,337 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 [2022-11-20 09:28:09,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:09,338 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:09,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:28:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:09,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:09,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732399767] [2022-11-20 09:28:09,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732399767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:09,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:09,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-20 09:28:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090241513] [2022-11-20 09:28:09,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:09,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:09,635 INFO L87 Difference]: Start difference. First operand 432 states and 1468 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:10,437 INFO L93 Difference]: Finished difference Result 851 states and 2781 transitions. [2022-11-20 09:28:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 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 [2022-11-20 09:28:10,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:10,442 INFO L225 Difference]: With dead ends: 851 [2022-11-20 09:28:10,442 INFO L226 Difference]: Without dead ends: 851 [2022-11-20 09:28:10,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:28:10,443 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 231 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:10,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 24 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:28:10,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-20 09:28:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 432. [2022-11-20 09:28:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 391 states have (on average 3.585677749360614) internal successors, (1402), 431 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1402 transitions. [2022-11-20 09:28:10,462 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1402 transitions. Word has length 7 [2022-11-20 09:28:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:10,463 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1402 transitions. [2022-11-20 09:28:10,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1402 transitions. [2022-11-20 09:28:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:28:10,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:10,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:10,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:10,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:10,676 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash 253794196, now seen corresponding path program 1 times [2022-11-20 09:28:10,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:10,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1028566527] [2022-11-20 09:28:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:10,677 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 [2022-11-20 09:28:10,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:10,678 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:10,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:10,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:28:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:10,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:10,945 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-20 09:28:10,945 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-20 09:28:10,959 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 [2022-11-20 09:28:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:11,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:11,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:11,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1028566527] [2022-11-20 09:28:11,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1028566527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:11,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:11,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:28:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626402271] [2022-11-20 09:28:11,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:11,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:11,497 INFO L87 Difference]: Start difference. First operand 432 states and 1402 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) [2022-11-20 09:28:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:11,988 INFO L93 Difference]: Finished difference Result 440 states and 1422 transitions. [2022-11-20 09:28:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:11,989 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 [2022-11-20 09:28:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:11,991 INFO L225 Difference]: With dead ends: 440 [2022-11-20 09:28:11,991 INFO L226 Difference]: Without dead ends: 440 [2022-11-20 09:28:11,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:28:11,992 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:11,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-11-20 09:28:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-20 09:28:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-11-20 09:28:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 395 states have (on average 3.5746835443037974) internal successors, (1412), 435 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1412 transitions. [2022-11-20 09:28:12,005 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1412 transitions. Word has length 7 [2022-11-20 09:28:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:12,006 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 1412 transitions. [2022-11-20 09:28:12,006 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) [2022-11-20 09:28:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1412 transitions. [2022-11-20 09:28:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:28:12,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:12,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:12,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:12,219 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:12,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash 253794113, now seen corresponding path program 1 times [2022-11-20 09:28:12,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:12,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021391129] [2022-11-20 09:28:12,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:12,220 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 [2022-11-20 09:28:12,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:12,221 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:12,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:12,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:12,435 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:12,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:12,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:13,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:13,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021391129] [2022-11-20 09:28:13,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021391129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:13,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:13,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672827703] [2022-11-20 09:28:13,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:13,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:13,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:13,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:13,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:13,069 INFO L87 Difference]: Start difference. First operand 436 states and 1412 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-20 09:28:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:14,651 INFO L93 Difference]: Finished difference Result 793 states and 2714 transitions. [2022-11-20 09:28:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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 [2022-11-20 09:28:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:14,656 INFO L225 Difference]: With dead ends: 793 [2022-11-20 09:28:14,657 INFO L226 Difference]: Without dead ends: 793 [2022-11-20 09:28:14,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:14,658 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 283 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:14,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 09:28:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-20 09:28:14,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 643. [2022-11-20 09:28:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 602 states have (on average 3.86046511627907) internal successors, (2324), 642 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2324 transitions. [2022-11-20 09:28:14,679 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2324 transitions. Word has length 7 [2022-11-20 09:28:14,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:14,679 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 2324 transitions. [2022-11-20 09:28:14,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 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) [2022-11-20 09:28:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2324 transitions. [2022-11-20 09:28:14,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:28:14,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:14,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:14,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:14,892 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:14,892 INFO L85 PathProgramCache]: Analyzing trace with hash 253794195, now seen corresponding path program 1 times [2022-11-20 09:28:14,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:14,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456975192] [2022-11-20 09:28:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:14,893 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 [2022-11-20 09:28:14,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:14,894 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:14,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:15,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 09:28:15,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:15,087 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-20 09:28:15,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-20 09:28:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:15,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:15,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:15,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456975192] [2022-11-20 09:28:15,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456975192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:15,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:15,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:28:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014016152] [2022-11-20 09:28:15,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:15,130 INFO L87 Difference]: Start difference. First operand 643 states and 2324 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:15,273 INFO L93 Difference]: Finished difference Result 621 states and 2257 transitions. [2022-11-20 09:28:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:15,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:28:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:15,275 INFO L225 Difference]: With dead ends: 621 [2022-11-20 09:28:15,276 INFO L226 Difference]: Without dead ends: 621 [2022-11-20 09:28:15,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:15,276 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:15,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-20 09:28:15,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2022-11-20 09:28:15,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 586 states have (on average 3.8515358361774745) internal successors, (2257), 620 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 2257 transitions. [2022-11-20 09:28:15,296 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 2257 transitions. Word has length 7 [2022-11-20 09:28:15,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:15,297 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 2257 transitions. [2022-11-20 09:28:15,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,297 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 2257 transitions. [2022-11-20 09:28:15,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:28:15,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:15,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:15,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:15,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:15,521 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash 253977843, now seen corresponding path program 1 times [2022-11-20 09:28:15,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:15,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [840978412] [2022-11-20 09:28:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:15,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:15,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:15,524 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:15,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:15,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:28:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:15,718 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 09:28:15,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-20 09:28:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:15,753 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:15,753 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:15,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [840978412] [2022-11-20 09:28:15,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [840978412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:15,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:15,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:28:15,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750519351] [2022-11-20 09:28:15,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:15,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:15,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:15,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:15,756 INFO L87 Difference]: Start difference. First operand 621 states and 2257 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:15,894 INFO L93 Difference]: Finished difference Result 585 states and 2141 transitions. [2022-11-20 09:28:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:15,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 09:28:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:15,897 INFO L225 Difference]: With dead ends: 585 [2022-11-20 09:28:15,897 INFO L226 Difference]: Without dead ends: 585 [2022-11-20 09:28:15,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:15,898 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:15,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-20 09:28:15,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2022-11-20 09:28:15,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 556 states have (on average 3.8507194244604315) internal successors, (2141), 584 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 2141 transitions. [2022-11-20 09:28:15,917 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 2141 transitions. Word has length 7 [2022-11-20 09:28:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:15,917 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 2141 transitions. [2022-11-20 09:28:15,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 2141 transitions. [2022-11-20 09:28:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 09:28:15,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:15,918 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:15,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:16,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:16,130 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:16,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:16,131 INFO L85 PathProgramCache]: Analyzing trace with hash 253977844, now seen corresponding path program 1 times [2022-11-20 09:28:16,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:16,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026586632] [2022-11-20 09:28:16,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:16,131 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 [2022-11-20 09:28:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:16,132 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:16,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:16,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:28:16,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:16,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:16,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:16,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:16,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:16,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026586632] [2022-11-20 09:28:16,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026586632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:16,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:16,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:28:16,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586555129] [2022-11-20 09:28:16,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:16,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:16,870 INFO L87 Difference]: Start difference. First operand 585 states and 2141 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) [2022-11-20 09:28:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:17,131 INFO L93 Difference]: Finished difference Result 1116 states and 4132 transitions. [2022-11-20 09:28:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:17,132 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 [2022-11-20 09:28:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:17,136 INFO L225 Difference]: With dead ends: 1116 [2022-11-20 09:28:17,136 INFO L226 Difference]: Without dead ends: 1116 [2022-11-20 09:28:17,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:28:17,137 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:17,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 18 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-11-20 09:28:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-11-20 09:28:17,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 857. [2022-11-20 09:28:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 828 states have (on average 4.009661835748792) internal successors, (3320), 856 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:17,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 3320 transitions. [2022-11-20 09:28:17,190 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 3320 transitions. Word has length 7 [2022-11-20 09:28:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:17,191 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 3320 transitions. [2022-11-20 09:28:17,191 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) [2022-11-20 09:28:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 3320 transitions. [2022-11-20 09:28:17,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:28:17,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:17,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:17,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:17,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:17,409 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash -722314526, now seen corresponding path program 1 times [2022-11-20 09:28:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:17,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322065940] [2022-11-20 09:28:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:17,410 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 [2022-11-20 09:28:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:17,411 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:17,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 09:28:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:17,671 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-20 09:28:17,672 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-20 09:28:17,685 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 [2022-11-20 09:28:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:17,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:18,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:18,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322065940] [2022-11-20 09:28:18,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322065940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:18,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:18,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-20 09:28:18,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730538448] [2022-11-20 09:28:18,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:18,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 09:28:18,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 09:28:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:18,269 INFO L87 Difference]: Start difference. First operand 857 states and 3320 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) [2022-11-20 09:28:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:18,695 INFO L93 Difference]: Finished difference Result 858 states and 3320 transitions. [2022-11-20 09:28:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:18,696 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 [2022-11-20 09:28:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:18,699 INFO L225 Difference]: With dead ends: 858 [2022-11-20 09:28:18,699 INFO L226 Difference]: Without dead ends: 858 [2022-11-20 09:28:18,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:28:18,700 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:18,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 22 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-11-20 09:28:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-11-20 09:28:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2022-11-20 09:28:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 829 states have (on average 4.0048250904704465) internal successors, (3320), 857 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3320 transitions. [2022-11-20 09:28:18,729 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3320 transitions. Word has length 8 [2022-11-20 09:28:18,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:18,729 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 3320 transitions. [2022-11-20 09:28:18,729 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) [2022-11-20 09:28:18,730 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3320 transitions. [2022-11-20 09:28:18,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 09:28:18,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:18,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:18,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:18,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:18,943 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:18,943 INFO L85 PathProgramCache]: Analyzing trace with hash -716626654, now seen corresponding path program 1 times [2022-11-20 09:28:18,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:18,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380562335] [2022-11-20 09:28:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:18,944 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 [2022-11-20 09:28:18,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:18,945 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:18,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:28:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:19,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:19,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 09:28:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:19,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380562335] [2022-11-20 09:28:19,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380562335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:19,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:19,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366918166] [2022-11-20 09:28:19,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:19,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:19,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:19,458 INFO L87 Difference]: Start difference. First operand 858 states and 3320 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) [2022-11-20 09:28:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:20,409 INFO L93 Difference]: Finished difference Result 1652 states and 6140 transitions. [2022-11-20 09:28:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:20,410 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 [2022-11-20 09:28:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:20,417 INFO L225 Difference]: With dead ends: 1652 [2022-11-20 09:28:20,417 INFO L226 Difference]: Without dead ends: 1652 [2022-11-20 09:28:20,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:28:20,418 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 387 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:20,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 17 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 09:28:20,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2022-11-20 09:28:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1069. [2022-11-20 09:28:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1040 states have (on average 4.201923076923077) internal successors, (4370), 1068 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4370 transitions. [2022-11-20 09:28:20,461 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4370 transitions. Word has length 8 [2022-11-20 09:28:20,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:20,461 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 4370 transitions. [2022-11-20 09:28:20,462 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) [2022-11-20 09:28:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4370 transitions. [2022-11-20 09:28:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:28:20,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:20,462 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:20,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:20,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:20,675 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash -23091308, now seen corresponding path program 2 times [2022-11-20 09:28:20,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:20,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875445512] [2022-11-20 09:28:20,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:20,676 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 [2022-11-20 09:28:20,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:20,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:20,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:20,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:28:20,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:20,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:28:20,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:20,956 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-20 09:28:20,956 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-20 09:28:20,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-20 09:28:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:21,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:21,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:21,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875445512] [2022-11-20 09:28:21,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875445512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:21,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:21,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:21,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736297007] [2022-11-20 09:28:21,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:21,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:21,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:21,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:21,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:21,215 INFO L87 Difference]: Start difference. First operand 1069 states and 4370 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) [2022-11-20 09:28:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:21,406 INFO L93 Difference]: Finished difference Result 1065 states and 4357 transitions. [2022-11-20 09:28:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:21,407 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 [2022-11-20 09:28:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:21,412 INFO L225 Difference]: With dead ends: 1065 [2022-11-20 09:28:21,412 INFO L226 Difference]: Without dead ends: 1065 [2022-11-20 09:28:21,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:28:21,413 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:21,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 29 Unchecked, 0.2s Time] [2022-11-20 09:28:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-20 09:28:21,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2022-11-20 09:28:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1036 states have (on average 4.205598455598456) internal successors, (4357), 1064 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 4357 transitions. [2022-11-20 09:28:21,447 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 4357 transitions. Word has length 9 [2022-11-20 09:28:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:21,448 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 4357 transitions. [2022-11-20 09:28:21,448 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) [2022-11-20 09:28:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 4357 transitions. [2022-11-20 09:28:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:28:21,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:21,449 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:21,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:21,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:21,661 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:21,661 INFO L85 PathProgramCache]: Analyzing trace with hash -22907660, now seen corresponding path program 2 times [2022-11-20 09:28:21,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:21,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384933167] [2022-11-20 09:28:21,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:21,662 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 [2022-11-20 09:28:21,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:21,663 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:21,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:21,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:28:21,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 09:28:21,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:21,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:21,904 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 09:28:21,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-20 09:28:21,921 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 167 treesize of output 163 [2022-11-20 09:28:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:28:22,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:22,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:22,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384933167] [2022-11-20 09:28:22,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384933167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:22,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:22,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 09:28:22,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355973924] [2022-11-20 09:28:22,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:22,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:22,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:22,014 INFO L87 Difference]: Start difference. First operand 1065 states and 4357 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:22,159 INFO L93 Difference]: Finished difference Result 1021 states and 4206 transitions. [2022-11-20 09:28:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:22,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:28:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:22,164 INFO L225 Difference]: With dead ends: 1021 [2022-11-20 09:28:22,165 INFO L226 Difference]: Without dead ends: 1021 [2022-11-20 09:28:22,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:22,166 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:22,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-11-20 09:28:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 670. [2022-11-20 09:28:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 647 states have (on average 4.041731066460588) internal successors, (2615), 669 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2615 transitions. [2022-11-20 09:28:22,189 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2615 transitions. Word has length 9 [2022-11-20 09:28:22,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:22,190 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 2615 transitions. [2022-11-20 09:28:22,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,190 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2615 transitions. [2022-11-20 09:28:22,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:28:22,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:22,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:22,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:22,401 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash -740412915, now seen corresponding path program 1 times [2022-11-20 09:28:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530194397] [2022-11-20 09:28:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:22,402 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 [2022-11-20 09:28:22,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:22,403 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:22,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 09:28:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:22,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:22,548 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:22,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530194397] [2022-11-20 09:28:22,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530194397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:22,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:22,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:22,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823898130] [2022-11-20 09:28:22,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:22,549 INFO L87 Difference]: Start difference. First operand 670 states and 2615 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:22,713 INFO L93 Difference]: Finished difference Result 510 states and 1883 transitions. [2022-11-20 09:28:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 09:28:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:22,716 INFO L225 Difference]: With dead ends: 510 [2022-11-20 09:28:22,716 INFO L226 Difference]: Without dead ends: 510 [2022-11-20 09:28:22,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:22,717 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:22,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:28:22,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-20 09:28:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-11-20 09:28:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 495 states have (on average 3.804040404040404) internal successors, (1883), 509 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1883 transitions. [2022-11-20 09:28:22,737 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1883 transitions. Word has length 9 [2022-11-20 09:28:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:22,737 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 1883 transitions. [2022-11-20 09:28:22,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1883 transitions. [2022-11-20 09:28:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 09:28:22,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:22,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:22,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:22,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:22,950 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash -740587394, now seen corresponding path program 1 times [2022-11-20 09:28:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:22,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150213174] [2022-11-20 09:28:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:22,951 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 [2022-11-20 09:28:22,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:22,952 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:22,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:23,212 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:23,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:23,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:23,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:23,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150213174] [2022-11-20 09:28:23,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150213174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:23,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:23,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:23,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178940725] [2022-11-20 09:28:23,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:23,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:23,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:23,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:23,895 INFO L87 Difference]: Start difference. First operand 510 states and 1883 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-20 09:28:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:24,435 INFO L93 Difference]: Finished difference Result 512 states and 1891 transitions. [2022-11-20 09:28:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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 [2022-11-20 09:28:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:24,437 INFO L225 Difference]: With dead ends: 512 [2022-11-20 09:28:24,437 INFO L226 Difference]: Without dead ends: 512 [2022-11-20 09:28:24,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:24,438 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:24,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 25 Unchecked, 0.5s Time] [2022-11-20 09:28:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-20 09:28:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-20 09:28:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 497 states have (on average 3.8048289738430583) internal successors, (1891), 511 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1891 transitions. [2022-11-20 09:28:24,452 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1891 transitions. Word has length 9 [2022-11-20 09:28:24,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:24,453 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 1891 transitions. [2022-11-20 09:28:24,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2022-11-20 09:28:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1891 transitions. [2022-11-20 09:28:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:28:24,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:24,454 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:24,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:24,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:24,666 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash -715830558, now seen corresponding path program 2 times [2022-11-20 09:28:24,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:24,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834204460] [2022-11-20 09:28:24,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:24,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:24,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:24,668 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:24,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:24,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:28:24,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:28:24,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:24,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 09:28:24,923 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-20 09:28:24,923 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 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-20 09:28:24,937 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 [2022-11-20 09:28:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 09:28:25,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:25,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:25,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834204460] [2022-11-20 09:28:25,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834204460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:25,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:25,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:25,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383670411] [2022-11-20 09:28:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:25,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:25,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:25,197 INFO L87 Difference]: Start difference. First operand 512 states and 1891 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) [2022-11-20 09:28:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:25,281 INFO L93 Difference]: Finished difference Result 511 states and 1890 transitions. [2022-11-20 09:28:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:28:25,281 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 10 [2022-11-20 09:28:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:25,283 INFO L225 Difference]: With dead ends: 511 [2022-11-20 09:28:25,283 INFO L226 Difference]: Without dead ends: 511 [2022-11-20 09:28:25,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:25,284 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:25,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-20 09:28:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-20 09:28:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 503. [2022-11-20 09:28:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 489 states have (on average 3.826175869120654) internal successors, (1871), 502 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1871 transitions. [2022-11-20 09:28:25,302 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1871 transitions. Word has length 10 [2022-11-20 09:28:25,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:25,303 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 1871 transitions. [2022-11-20 09:28:25,303 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) [2022-11-20 09:28:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1871 transitions. [2022-11-20 09:28:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:28:25,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:25,304 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:25,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:25,516 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:25,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1641026940, now seen corresponding path program 2 times [2022-11-20 09:28:25,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:25,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090836705] [2022-11-20 09:28:25,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:25,517 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 [2022-11-20 09:28:25,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:25,519 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:25,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:25,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:25,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:25,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 09:28:25,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:25,790 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:25,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:26,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:27,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090836705] [2022-11-20 09:28:27,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090836705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:27,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:27,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:28:27,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054559584] [2022-11-20 09:28:27,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:27,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:27,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:27,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:27,554 INFO L87 Difference]: Start difference. First operand 503 states and 1871 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2022-11-20 09:28:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:40,726 INFO L93 Difference]: Finished difference Result 1692 states and 5884 transitions. [2022-11-20 09:28:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:28:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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 10 [2022-11-20 09:28:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:40,734 INFO L225 Difference]: With dead ends: 1692 [2022-11-20 09:28:40,734 INFO L226 Difference]: Without dead ends: 1692 [2022-11-20 09:28:40,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:28:40,735 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 489 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:40,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 141 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-11-20 09:28:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-11-20 09:28:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 821. [2022-11-20 09:28:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 807 states have (on average 3.7732342007434942) internal successors, (3045), 820 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 3045 transitions. [2022-11-20 09:28:40,770 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 3045 transitions. Word has length 10 [2022-11-20 09:28:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:40,771 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 3045 transitions. [2022-11-20 09:28:40,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 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) [2022-11-20 09:28:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 3045 transitions. [2022-11-20 09:28:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:28:40,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:40,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:40,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:40,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:40,984 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1477994500, now seen corresponding path program 1 times [2022-11-20 09:28:40,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:40,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167519998] [2022-11-20 09:28:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:40,985 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 [2022-11-20 09:28:40,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:40,986 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:40,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:41,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:41,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:41,265 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:41,265 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:41,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:42,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:42,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167519998] [2022-11-20 09:28:42,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167519998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:42,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:42,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:42,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630153183] [2022-11-20 09:28:42,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:42,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:42,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:42,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:42,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:42,113 INFO L87 Difference]: Start difference. First operand 821 states and 3045 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:42,610 INFO L93 Difference]: Finished difference Result 845 states and 3135 transitions. [2022-11-20 09:28:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:42,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 10 [2022-11-20 09:28:42,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:42,615 INFO L225 Difference]: With dead ends: 845 [2022-11-20 09:28:42,615 INFO L226 Difference]: Without dead ends: 845 [2022-11-20 09:28:42,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:42,616 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:42,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-20 09:28:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-20 09:28:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 833. [2022-11-20 09:28:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 819 states have (on average 3.7765567765567765) internal successors, (3093), 832 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 3093 transitions. [2022-11-20 09:28:42,653 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 3093 transitions. Word has length 10 [2022-11-20 09:28:42,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:42,653 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 3093 transitions. [2022-11-20 09:28:42,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 3093 transitions. [2022-11-20 09:28:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:28:42,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:42,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:42,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:42,867 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1477967732, now seen corresponding path program 1 times [2022-11-20 09:28:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224255298] [2022-11-20 09:28:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:42,868 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 [2022-11-20 09:28:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:42,869 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:42,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:28:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:43,134 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:43,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:43,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:44,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:44,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224255298] [2022-11-20 09:28:44,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224255298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:44,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:44,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:44,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624141586] [2022-11-20 09:28:44,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:44,535 INFO L87 Difference]: Start difference. First operand 833 states and 3093 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:45,191 INFO L93 Difference]: Finished difference Result 860 states and 3200 transitions. [2022-11-20 09:28:45,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:28:45,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 10 [2022-11-20 09:28:45,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:45,194 INFO L225 Difference]: With dead ends: 860 [2022-11-20 09:28:45,194 INFO L226 Difference]: Without dead ends: 860 [2022-11-20 09:28:45,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:28:45,195 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:45,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-11-20 09:28:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-20 09:28:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2022-11-20 09:28:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 846 states have (on average 3.7825059101654848) internal successors, (3200), 859 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3200 transitions. [2022-11-20 09:28:45,221 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3200 transitions. Word has length 10 [2022-11-20 09:28:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:45,222 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 3200 transitions. [2022-11-20 09:28:45,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3200 transitions. [2022-11-20 09:28:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:28:45,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:45,223 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:45,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:45,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:45,436 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1483356880, now seen corresponding path program 2 times [2022-11-20 09:28:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:45,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273883903] [2022-11-20 09:28:45,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:45,437 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 [2022-11-20 09:28:45,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:45,438 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:45,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:45,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:45,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:45,766 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:45,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:46,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:46,606 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:46,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273883903] [2022-11-20 09:28:46,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273883903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:46,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:46,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:46,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152690093] [2022-11-20 09:28:46,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:46,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:46,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:46,608 INFO L87 Difference]: Start difference. First operand 860 states and 3200 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:47,374 INFO L93 Difference]: Finished difference Result 1136 states and 4380 transitions. [2022-11-20 09:28:47,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:47,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 10 [2022-11-20 09:28:47,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:47,378 INFO L225 Difference]: With dead ends: 1136 [2022-11-20 09:28:47,378 INFO L226 Difference]: Without dead ends: 1136 [2022-11-20 09:28:47,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:47,379 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:47,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 126 Unchecked, 0.7s Time] [2022-11-20 09:28:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-20 09:28:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1082. [2022-11-20 09:28:47,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1068 states have (on average 3.9775280898876404) internal successors, (4248), 1081 states have internal predecessors, (4248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 4248 transitions. [2022-11-20 09:28:47,412 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 4248 transitions. Word has length 10 [2022-11-20 09:28:47,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:47,412 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 4248 transitions. [2022-11-20 09:28:47,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:47,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 4248 transitions. [2022-11-20 09:28:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 09:28:47,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:47,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:47,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:47,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:47,626 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1483369900, now seen corresponding path program 3 times [2022-11-20 09:28:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729864242] [2022-11-20 09:28:47,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:47,628 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 [2022-11-20 09:28:47,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:47,630 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:47,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:47,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:28:47,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:47,951 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:47,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:48,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:48,811 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:48,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729864242] [2022-11-20 09:28:48,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729864242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:48,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:48,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920102890] [2022-11-20 09:28:48,812 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:48,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:48,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:48,813 INFO L87 Difference]: Start difference. First operand 1082 states and 4248 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:49,538 INFO L93 Difference]: Finished difference Result 1190 states and 4674 transitions. [2022-11-20 09:28:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 10 [2022-11-20 09:28:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:49,549 INFO L225 Difference]: With dead ends: 1190 [2022-11-20 09:28:49,549 INFO L226 Difference]: Without dead ends: 1190 [2022-11-20 09:28:49,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:49,551 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:49,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 21 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 75 Unchecked, 0.7s Time] [2022-11-20 09:28:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-20 09:28:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1028. [2022-11-20 09:28:49,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1014 states have (on average 3.899408284023669) internal successors, (3954), 1027 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3954 transitions. [2022-11-20 09:28:49,583 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3954 transitions. Word has length 10 [2022-11-20 09:28:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:49,583 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 3954 transitions. [2022-11-20 09:28:49,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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) [2022-11-20 09:28:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3954 transitions. [2022-11-20 09:28:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:28:49,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:49,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:49,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:49,797 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash -671548261, now seen corresponding path program 1 times [2022-11-20 09:28:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:49,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17260418] [2022-11-20 09:28:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:49,798 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 [2022-11-20 09:28:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:49,800 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:49,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:50,122 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:50,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:50,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:51,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17260418] [2022-11-20 09:28:51,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17260418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:51,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:51,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:51,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324428581] [2022-11-20 09:28:51,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:51,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:51,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:51,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:51,019 INFO L87 Difference]: Start difference. First operand 1028 states and 3954 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:51,561 INFO L93 Difference]: Finished difference Result 1052 states and 4068 transitions. [2022-11-20 09:28:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:28:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:51,564 INFO L225 Difference]: With dead ends: 1052 [2022-11-20 09:28:51,565 INFO L226 Difference]: Without dead ends: 1052 [2022-11-20 09:28:51,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:51,565 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:51,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-11-20 09:28:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-20 09:28:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1040. [2022-11-20 09:28:51,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1026 states have (on average 3.912280701754386) internal successors, (4014), 1039 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4014 transitions. [2022-11-20 09:28:51,590 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4014 transitions. Word has length 11 [2022-11-20 09:28:51,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:51,591 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 4014 transitions. [2022-11-20 09:28:51,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4014 transitions. [2022-11-20 09:28:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:28:51,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:51,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:51,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-11-20 09:28:51,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:51,804 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash -784916191, now seen corresponding path program 2 times [2022-11-20 09:28:51,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:51,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129922555] [2022-11-20 09:28:51,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:51,805 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 [2022-11-20 09:28:51,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:51,806 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:51,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:51,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:51,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:51,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:51,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:52,124 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:52,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:52,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:53,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:53,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129922555] [2022-11-20 09:28:53,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129922555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:53,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:53,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:53,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320704590] [2022-11-20 09:28:53,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:53,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:53,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:53,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:53,030 INFO L87 Difference]: Start difference. First operand 1040 states and 4014 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:53,693 INFO L93 Difference]: Finished difference Result 1062 states and 4113 transitions. [2022-11-20 09:28:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:28:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:28:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:53,697 INFO L225 Difference]: With dead ends: 1062 [2022-11-20 09:28:53,697 INFO L226 Difference]: Without dead ends: 1062 [2022-11-20 09:28:53,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:53,698 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:53,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2022-11-20 09:28:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-11-20 09:28:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1056. [2022-11-20 09:28:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1042 states have (on average 3.9213051823416505) internal successors, (4086), 1055 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 4086 transitions. [2022-11-20 09:28:53,739 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 4086 transitions. Word has length 11 [2022-11-20 09:28:53,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:53,739 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 4086 transitions. [2022-11-20 09:28:53,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 4086 transitions. [2022-11-20 09:28:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:28:53,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:53,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:53,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:53,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:53,954 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:53,954 INFO L85 PathProgramCache]: Analyzing trace with hash -784907821, now seen corresponding path program 3 times [2022-11-20 09:28:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:53,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070377475] [2022-11-20 09:28:53,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:53,955 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 [2022-11-20 09:28:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:53,956 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:53,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:54,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:28:54,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:54,280 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:54,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:54,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:55,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:55,111 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:55,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070377475] [2022-11-20 09:28:55,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070377475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:55,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:55,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464096284] [2022-11-20 09:28:55,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:55,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:55,112 INFO L87 Difference]: Start difference. First operand 1056 states and 4086 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:55,680 INFO L93 Difference]: Finished difference Result 1086 states and 4235 transitions. [2022-11-20 09:28:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:28:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:55,685 INFO L225 Difference]: With dead ends: 1086 [2022-11-20 09:28:55,685 INFO L226 Difference]: Without dead ends: 1086 [2022-11-20 09:28:55,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:28:55,686 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:55,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-20 09:28:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-20 09:28:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1070. [2022-11-20 09:28:55,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1056 states have (on average 3.941287878787879) internal successors, (4162), 1069 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 4162 transitions. [2022-11-20 09:28:55,711 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 4162 transitions. Word has length 11 [2022-11-20 09:28:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:55,711 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 4162 transitions. [2022-11-20 09:28:55,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 4162 transitions. [2022-11-20 09:28:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:28:55,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:55,712 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:55,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 09:28:55,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:55,912 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:55,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:55,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1426813156, now seen corresponding path program 4 times [2022-11-20 09:28:55,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:55,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050259854] [2022-11-20 09:28:55,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:28:55,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:55,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:55,914 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:55,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:56,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:28:56,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:28:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:56,207 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:56,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:56,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:57,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:57,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:57,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050259854] [2022-11-20 09:28:57,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050259854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:57,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:57,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-20 09:28:57,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027458039] [2022-11-20 09:28:57,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:57,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:28:57,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:28:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:28:57,362 INFO L87 Difference]: Start difference. First operand 1070 states and 4162 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:58,207 INFO L93 Difference]: Finished difference Result 1058 states and 4112 transitions. [2022-11-20 09:28:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:28:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:58,211 INFO L225 Difference]: With dead ends: 1058 [2022-11-20 09:28:58,212 INFO L226 Difference]: Without dead ends: 1058 [2022-11-20 09:28:58,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:28:58,212 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:58,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 66 Unchecked, 0.8s Time] [2022-11-20 09:28:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-11-20 09:28:58,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1058. [2022-11-20 09:28:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1044 states have (on average 3.9386973180076628) internal successors, (4112), 1057 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:58,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 4112 transitions. [2022-11-20 09:28:58,236 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 4112 transitions. Word has length 11 [2022-11-20 09:28:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:58,236 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 4112 transitions. [2022-11-20 09:28:58,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:58,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 4112 transitions. [2022-11-20 09:28:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:28:58,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:58,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:58,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:58,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:58,450 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:28:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:58,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1426679577, now seen corresponding path program 1 times [2022-11-20 09:28:58,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:28:58,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890892246] [2022-11-20 09:28:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:58,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:28:58,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:28:58,453 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:28:58,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:28:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:58,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:28:58,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:58,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:28:58,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:28:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:59,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:59,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:28:59,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890892246] [2022-11-20 09:28:59,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890892246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:59,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:59,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:28:59,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216316155] [2022-11-20 09:28:59,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:59,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:59,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:28:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:59,560 INFO L87 Difference]: Start difference. First operand 1058 states and 4112 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:00,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:00,089 INFO L93 Difference]: Finished difference Result 1082 states and 4240 transitions. [2022-11-20 09:29:00,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:29:00,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:29:00,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:00,094 INFO L225 Difference]: With dead ends: 1082 [2022-11-20 09:29:00,094 INFO L226 Difference]: Without dead ends: 1082 [2022-11-20 09:29:00,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:29:00,094 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:00,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-11-20 09:29:00,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-11-20 09:29:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1078. [2022-11-20 09:29:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1064 states have (on average 3.969924812030075) internal successors, (4224), 1077 states have internal predecessors, (4224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 4224 transitions. [2022-11-20 09:29:00,130 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 4224 transitions. Word has length 11 [2022-11-20 09:29:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:00,130 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 4224 transitions. [2022-11-20 09:29:00,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:00,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 4224 transitions. [2022-11-20 09:29:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:29:00,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:00,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:00,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-20 09:29:00,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:00,342 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:00,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:00,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1427774977, now seen corresponding path program 1 times [2022-11-20 09:29:00,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:00,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737228396] [2022-11-20 09:29:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:00,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:00,344 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:00,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:00,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:29:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:00,624 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:00,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:00,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:01,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737228396] [2022-11-20 09:29:01,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737228396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:01,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:01,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:29:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198594648] [2022-11-20 09:29:01,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:01,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:29:01,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:29:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:29:01,716 INFO L87 Difference]: Start difference. First operand 1078 states and 4224 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:02,595 INFO L93 Difference]: Finished difference Result 1150 states and 4580 transitions. [2022-11-20 09:29:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:29:02,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:29:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:02,599 INFO L225 Difference]: With dead ends: 1150 [2022-11-20 09:29:02,599 INFO L226 Difference]: Without dead ends: 1150 [2022-11-20 09:29:02,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:29:02,600 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:02,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-11-20 09:29:02,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-11-20 09:29:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2022-11-20 09:29:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1136 states have (on average 4.03169014084507) internal successors, (4580), 1149 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4580 transitions. [2022-11-20 09:29:02,624 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4580 transitions. Word has length 11 [2022-11-20 09:29:02,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:02,624 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 4580 transitions. [2022-11-20 09:29:02,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4580 transitions. [2022-11-20 09:29:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:29:02,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:02,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:02,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 09:29:02,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:02,833 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:02,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1427643847, now seen corresponding path program 2 times [2022-11-20 09:29:02,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:02,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579458715] [2022-11-20 09:29:02,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:02,834 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 [2022-11-20 09:29:02,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:02,835 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:02,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:02,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 09:29:02,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 09:29:02,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:03,116 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:03,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:03,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:29:03,372 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:03,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579458715] [2022-11-20 09:29:03,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579458715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:29:03,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:29:03,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:29:03,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824187863] [2022-11-20 09:29:03,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:29:03,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:29:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:03,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:29:03,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:29:03,373 INFO L87 Difference]: Start difference. First operand 1150 states and 4580 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:03,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:03,791 INFO L93 Difference]: Finished difference Result 1331 states and 5232 transitions. [2022-11-20 09:29:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:29:03,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:29:03,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:03,796 INFO L225 Difference]: With dead ends: 1331 [2022-11-20 09:29:03,796 INFO L226 Difference]: Without dead ends: 1331 [2022-11-20 09:29:03,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:29:03,797 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:03,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:29:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-11-20 09:29:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1236. [2022-11-20 09:29:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1222 states have (on average 3.954991816693944) internal successors, (4833), 1235 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4833 transitions. [2022-11-20 09:29:03,818 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4833 transitions. Word has length 11 [2022-11-20 09:29:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:03,819 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 4833 transitions. [2022-11-20 09:29:03,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4833 transitions. [2022-11-20 09:29:03,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:29:03,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:03,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:03,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:04,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:04,020 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:04,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:04,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1427644591, now seen corresponding path program 1 times [2022-11-20 09:29:04,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:04,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580963788] [2022-11-20 09:29:04,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:04,021 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 [2022-11-20 09:29:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:04,022 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:04,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:29:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:04,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580963788] [2022-11-20 09:29:04,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580963788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:04,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:04,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:29:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590215452] [2022-11-20 09:29:04,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:29:04,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:29:04,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:29:04,705 INFO L87 Difference]: Start difference. First operand 1236 states and 4833 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:05,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:05,879 INFO L93 Difference]: Finished difference Result 1316 states and 4941 transitions. [2022-11-20 09:29:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:29:05,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:29:05,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:05,883 INFO L225 Difference]: With dead ends: 1316 [2022-11-20 09:29:05,883 INFO L226 Difference]: Without dead ends: 1316 [2022-11-20 09:29:05,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:29:05,884 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 157 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:05,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 41 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 69 Unchecked, 1.0s Time] [2022-11-20 09:29:05,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-11-20 09:29:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1287. [2022-11-20 09:29:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1273 states have (on average 3.8389630793401412) internal successors, (4887), 1286 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4887 transitions. [2022-11-20 09:29:05,904 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4887 transitions. Word has length 11 [2022-11-20 09:29:05,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:05,905 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 4887 transitions. [2022-11-20 09:29:05,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4887 transitions. [2022-11-20 09:29:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 09:29:05,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:05,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:05,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-20 09:29:06,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:06,109 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:06,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1427630967, now seen corresponding path program 2 times [2022-11-20 09:29:06,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:06,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123339507] [2022-11-20 09:29:06,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:06,110 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 [2022-11-20 09:29:06,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:06,111 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:06,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:06,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:29:06,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:06,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:29:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:06,431 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:06,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:06,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:29:07,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:07,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123339507] [2022-11-20 09:29:07,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123339507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:07,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:07,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:29:07,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366965692] [2022-11-20 09:29:07,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:07,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:29:07,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:07,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:29:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:29:07,289 INFO L87 Difference]: Start difference. First operand 1287 states and 4887 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:07,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:07,795 INFO L93 Difference]: Finished difference Result 1315 states and 5023 transitions. [2022-11-20 09:29:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:29:07,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 09:29:07,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:07,799 INFO L225 Difference]: With dead ends: 1315 [2022-11-20 09:29:07,799 INFO L226 Difference]: Without dead ends: 1315 [2022-11-20 09:29:07,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:29:07,800 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:07,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-11-20 09:29:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-20 09:29:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1303. [2022-11-20 09:29:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1289 states have (on average 3.8502715283165245) internal successors, (4963), 1302 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4963 transitions. [2022-11-20 09:29:07,829 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4963 transitions. Word has length 11 [2022-11-20 09:29:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:07,829 INFO L495 AbstractCegarLoop]: Abstraction has 1303 states and 4963 transitions. [2022-11-20 09:29:07,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4963 transitions. [2022-11-20 09:29:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:29:07,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:07,831 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-20 09:29:07,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:08,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:08,031 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:08,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash 417008356, now seen corresponding path program 3 times [2022-11-20 09:29:08,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:08,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369634682] [2022-11-20 09:29:08,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:29:08,032 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 [2022-11-20 09:29:08,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:08,033 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:08,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:08,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 09:29:08,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:08,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:29:08,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:08,400 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:08,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:08,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:12,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369634682] [2022-11-20 09:29:12,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369634682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:12,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:12,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 09:29:12,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189901195] [2022-11-20 09:29:12,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:12,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:29:12,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:12,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:29:12,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:29:12,494 INFO L87 Difference]: Start difference. First operand 1303 states and 4963 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) [2022-11-20 09:29:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:38,307 INFO L93 Difference]: Finished difference Result 14485 states and 56715 transitions. [2022-11-20 09:29:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:29:38,308 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 [2022-11-20 09:29:38,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:38,362 INFO L225 Difference]: With dead ends: 14485 [2022-11-20 09:29:38,362 INFO L226 Difference]: Without dead ends: 14485 [2022-11-20 09:29:38,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:29:38,363 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4095 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4095 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:38,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4095 Valid, 360 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-11-20 09:29:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14485 states. [2022-11-20 09:29:38,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14485 to 1315. [2022-11-20 09:29:38,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1315 states, 1301 states have (on average 3.833205226748655) internal successors, (4987), 1314 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 4987 transitions. [2022-11-20 09:29:38,671 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 4987 transitions. Word has length 12 [2022-11-20 09:29:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:38,671 INFO L495 AbstractCegarLoop]: Abstraction has 1315 states and 4987 transitions. [2022-11-20 09:29:38,671 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) [2022-11-20 09:29:38,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 4987 transitions. [2022-11-20 09:29:38,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:29:38,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:38,672 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-20 09:29:38,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:38,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:38,885 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:38,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -402760063, now seen corresponding path program 3 times [2022-11-20 09:29:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:38,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186484690] [2022-11-20 09:29:38,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:29:38,887 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 [2022-11-20 09:29:38,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:38,888 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:38,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:39,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 09:29:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:39,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:29:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:39,352 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:39,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:39,426 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 15 treesize of output 11 [2022-11-20 09:29:39,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:29:39,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 09:29:40,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:40,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186484690] [2022-11-20 09:29:40,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186484690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:40,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:40,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-20 09:29:40,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766804019] [2022-11-20 09:29:40,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:40,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:29:40,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:29:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:29:40,065 INFO L87 Difference]: Start difference. First operand 1315 states and 4987 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-20 09:29:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:42,952 INFO L93 Difference]: Finished difference Result 1840 states and 6778 transitions. [2022-11-20 09:29:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:29:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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 12 [2022-11-20 09:29:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:42,956 INFO L225 Difference]: With dead ends: 1840 [2022-11-20 09:29:42,956 INFO L226 Difference]: Without dead ends: 1840 [2022-11-20 09:29:42,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:29:42,957 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 345 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:42,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 129 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 09:29:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2022-11-20 09:29:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1640. [2022-11-20 09:29:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1626 states have (on average 3.839483394833948) internal successors, (6243), 1639 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 6243 transitions. [2022-11-20 09:29:42,996 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 6243 transitions. Word has length 12 [2022-11-20 09:29:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:42,996 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 6243 transitions. [2022-11-20 09:29:42,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 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) [2022-11-20 09:29:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 6243 transitions. [2022-11-20 09:29:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:29:42,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:42,998 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:43,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:43,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:43,211 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:43,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1691818127, now seen corresponding path program 3 times [2022-11-20 09:29:43,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:43,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260423830] [2022-11-20 09:29:43,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:29:43,212 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 [2022-11-20 09:29:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:43,213 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:43,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:43,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:29:43,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:43,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 09:29:43,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:43,525 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 09:29:43,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 09:29:43,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:43,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:44,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:44,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260423830] [2022-11-20 09:29:44,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260423830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:44,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:44,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 09:29:44,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548774625] [2022-11-20 09:29:44,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:44,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:29:44,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:29:44,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:29:44,399 INFO L87 Difference]: Start difference. First operand 1640 states and 6243 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-11-20 09:29:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:45,843 INFO L93 Difference]: Finished difference Result 2291 states and 8296 transitions. [2022-11-20 09:29:45,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:29:45,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 [2022-11-20 09:29:45,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:45,865 INFO L225 Difference]: With dead ends: 2291 [2022-11-20 09:29:45,865 INFO L226 Difference]: Without dead ends: 2291 [2022-11-20 09:29:45,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:29:45,865 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 360 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:45,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 48 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 09:29:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-11-20 09:29:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1810. [2022-11-20 09:29:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1796 states have (on average 3.898663697104677) internal successors, (7002), 1809 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 7002 transitions. [2022-11-20 09:29:45,896 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 7002 transitions. Word has length 12 [2022-11-20 09:29:45,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:45,896 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 7002 transitions. [2022-11-20 09:29:45,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-11-20 09:29:45,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 7002 transitions. [2022-11-20 09:29:45,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:29:45,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:45,897 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:45,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:46,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:46,098 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1692653871, now seen corresponding path program 2 times [2022-11-20 09:29:46,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:46,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769600875] [2022-11-20 09:29:46,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:46,099 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 [2022-11-20 09:29:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:46,100 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:46,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:46,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:29:46,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:29:46,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:46,457 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:46,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:46,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:49,138 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:29:49,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769600875] [2022-11-20 09:29:49,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769600875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:49,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:49,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 09:29:49,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100160419] [2022-11-20 09:29:49,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:49,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:29:49,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:29:49,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:29:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:29:49,142 INFO L87 Difference]: Start difference. First operand 1810 states and 7002 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-11-20 09:29:58,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:58,189 INFO L93 Difference]: Finished difference Result 3669 states and 15006 transitions. [2022-11-20 09:29:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:29:58,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 [2022-11-20 09:29:58,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:58,200 INFO L225 Difference]: With dead ends: 3669 [2022-11-20 09:29:58,200 INFO L226 Difference]: Without dead ends: 3669 [2022-11-20 09:29:58,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:29:58,201 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 473 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:58,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 87 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 506 Invalid, 0 Unknown, 220 Unchecked, 2.5s Time] [2022-11-20 09:29:58,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2022-11-20 09:29:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 2395. [2022-11-20 09:29:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2381 states have (on average 3.99160016799664) internal successors, (9504), 2394 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 9504 transitions. [2022-11-20 09:29:58,289 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 9504 transitions. Word has length 12 [2022-11-20 09:29:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:58,289 INFO L495 AbstractCegarLoop]: Abstraction has 2395 states and 9504 transitions. [2022-11-20 09:29:58,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-11-20 09:29:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 9504 transitions. [2022-11-20 09:29:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:29:58,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:58,291 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:58,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:58,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:29:58,503 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:29:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1525171582, now seen corresponding path program 2 times [2022-11-20 09:29:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:29:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672146528] [2022-11-20 09:29:58,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:58,504 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 [2022-11-20 09:29:58,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:29:58,505 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:29:58,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:29:58,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:29:58,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:58,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:29:58,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:58,865 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:29:58,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:29:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:59,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:01,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672146528] [2022-11-20 09:30:01,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672146528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:01,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:01,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:30:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400784323] [2022-11-20 09:30:01,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:01,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:30:01,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:01,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:30:01,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:30:01,020 INFO L87 Difference]: Start difference. First operand 2395 states and 9504 transitions. Second operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2022-11-20 09:30:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:06,461 INFO L93 Difference]: Finished difference Result 3950 states and 15982 transitions. [2022-11-20 09:30:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:30:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 [2022-11-20 09:30:06,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:06,475 INFO L225 Difference]: With dead ends: 3950 [2022-11-20 09:30:06,475 INFO L226 Difference]: Without dead ends: 3950 [2022-11-20 09:30:06,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:30:06,476 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 211 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:06,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 103 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 565 Invalid, 0 Unknown, 276 Unchecked, 3.7s Time] [2022-11-20 09:30:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2022-11-20 09:30:06,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3186. [2022-11-20 09:30:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3172 states have (on average 4.203341740226986) internal successors, (13333), 3185 states have internal predecessors, (13333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 13333 transitions. [2022-11-20 09:30:06,582 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 13333 transitions. Word has length 12 [2022-11-20 09:30:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:06,583 INFO L495 AbstractCegarLoop]: Abstraction has 3186 states and 13333 transitions. [2022-11-20 09:30:06,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2022-11-20 09:30:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 13333 transitions. [2022-11-20 09:30:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:06,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:06,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:06,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:06,797 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash 226257129, now seen corresponding path program 1 times [2022-11-20 09:30:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:06,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808438790] [2022-11-20 09:30:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:06,798 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 [2022-11-20 09:30:06,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:06,799 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:06,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:06,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:07,091 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:07,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:30:07,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:30:08,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:08,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808438790] [2022-11-20 09:30:08,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808438790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:08,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:08,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:08,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175934576] [2022-11-20 09:30:08,014 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:08,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:08,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:08,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:08,015 INFO L87 Difference]: Start difference. First operand 3186 states and 13333 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:08,660 INFO L93 Difference]: Finished difference Result 3230 states and 13522 transitions. [2022-11-20 09:30:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:08,669 INFO L225 Difference]: With dead ends: 3230 [2022-11-20 09:30:08,669 INFO L226 Difference]: Without dead ends: 3230 [2022-11-20 09:30:08,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:08,670 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:08,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-11-20 09:30:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2022-11-20 09:30:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3188. [2022-11-20 09:30:08,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3174 states have (on average 4.202583490863264) internal successors, (13339), 3187 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 13339 transitions. [2022-11-20 09:30:08,727 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 13339 transitions. Word has length 12 [2022-11-20 09:30:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:08,727 INFO L495 AbstractCegarLoop]: Abstraction has 3188 states and 13339 transitions. [2022-11-20 09:30:08,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 13339 transitions. [2022-11-20 09:30:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:08,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:08,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:08,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:08,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:08,941 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:08,941 INFO L85 PathProgramCache]: Analyzing trace with hash 662218623, now seen corresponding path program 1 times [2022-11-20 09:30:08,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:08,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701894723] [2022-11-20 09:30:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:08,942 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 [2022-11-20 09:30:08,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:08,943 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:08,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:09,268 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:09,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:09,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:09,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:10,132 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:10,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701894723] [2022-11-20 09:30:10,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701894723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:10,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:10,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:10,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951204238] [2022-11-20 09:30:10,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:10,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:10,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:10,134 INFO L87 Difference]: Start difference. First operand 3188 states and 13339 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:10,662 INFO L93 Difference]: Finished difference Result 3265 states and 13708 transitions. [2022-11-20 09:30:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:10,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:10,703 INFO L225 Difference]: With dead ends: 3265 [2022-11-20 09:30:10,703 INFO L226 Difference]: Without dead ends: 3265 [2022-11-20 09:30:10,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:10,704 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:10,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-20 09:30:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2022-11-20 09:30:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 3190. [2022-11-20 09:30:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 3176 states have (on average 4.202455919395466) internal successors, (13347), 3189 states have internal predecessors, (13347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 13347 transitions. [2022-11-20 09:30:10,789 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 13347 transitions. Word has length 12 [2022-11-20 09:30:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:10,789 INFO L495 AbstractCegarLoop]: Abstraction has 3190 states and 13347 transitions. [2022-11-20 09:30:10,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 13347 transitions. [2022-11-20 09:30:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:10,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:10,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:10,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:11,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:11,004 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:11,005 INFO L85 PathProgramCache]: Analyzing trace with hash 656856243, now seen corresponding path program 2 times [2022-11-20 09:30:11,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:11,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273939989] [2022-11-20 09:30:11,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:11,005 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 [2022-11-20 09:30:11,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:11,026 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:11,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:11,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:11,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:11,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:11,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:11,384 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:11,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:11,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:12,263 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273939989] [2022-11-20 09:30:12,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273939989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:12,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:12,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:12,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465683978] [2022-11-20 09:30:12,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:12,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:12,264 INFO L87 Difference]: Start difference. First operand 3190 states and 13347 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:12,971 INFO L93 Difference]: Finished difference Result 3794 states and 16424 transitions. [2022-11-20 09:30:12,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:30:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:12,984 INFO L225 Difference]: With dead ends: 3794 [2022-11-20 09:30:12,984 INFO L226 Difference]: Without dead ends: 3794 [2022-11-20 09:30:12,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:12,985 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:12,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 56 Unchecked, 0.6s Time] [2022-11-20 09:30:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2022-11-20 09:30:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 3456. [2022-11-20 09:30:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 3442 states have (on average 4.2931435212085995) internal successors, (14777), 3455 states have internal predecessors, (14777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 14777 transitions. [2022-11-20 09:30:13,115 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 14777 transitions. Word has length 12 [2022-11-20 09:30:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:13,115 INFO L495 AbstractCegarLoop]: Abstraction has 3456 states and 14777 transitions. [2022-11-20 09:30:13,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 14777 transitions. [2022-11-20 09:30:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:13,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:13,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:13,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-20 09:30:13,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:13,317 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash 656843223, now seen corresponding path program 3 times [2022-11-20 09:30:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:13,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170995999] [2022-11-20 09:30:13,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:30:13,318 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 [2022-11-20 09:30:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:13,320 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:13,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:13,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:30:13,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:13,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:13,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:13,688 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:13,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:14,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:14,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:14,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170995999] [2022-11-20 09:30:14,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170995999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:14,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:14,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:14,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119008878] [2022-11-20 09:30:14,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:14,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:14,596 INFO L87 Difference]: Start difference. First operand 3456 states and 14777 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:15,281 INFO L93 Difference]: Finished difference Result 4061 states and 17936 transitions. [2022-11-20 09:30:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:15,294 INFO L225 Difference]: With dead ends: 4061 [2022-11-20 09:30:15,294 INFO L226 Difference]: Without dead ends: 4061 [2022-11-20 09:30:15,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:15,295 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:15,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2022-11-20 09:30:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2022-11-20 09:30:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3479. [2022-11-20 09:30:15,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3465 states have (on average 4.297258297258297) internal successors, (14890), 3478 states have internal predecessors, (14890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 14890 transitions. [2022-11-20 09:30:15,397 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 14890 transitions. Word has length 12 [2022-11-20 09:30:15,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:15,397 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 14890 transitions. [2022-11-20 09:30:15,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:15,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 14890 transitions. [2022-11-20 09:30:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:15,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:15,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:15,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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)] Ended with exit code 0 [2022-11-20 09:30:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:15,609 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:15,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:15,609 INFO L85 PathProgramCache]: Analyzing trace with hash 656842479, now seen corresponding path program 2 times [2022-11-20 09:30:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:15,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901464488] [2022-11-20 09:30:15,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:15,610 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 [2022-11-20 09:30:15,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:15,611 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:15,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:15,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:15,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:16,023 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:16,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:16,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:16,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:16,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901464488] [2022-11-20 09:30:16,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901464488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:16,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:16,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:16,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655920623] [2022-11-20 09:30:16,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:16,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:16,975 INFO L87 Difference]: Start difference. First operand 3479 states and 14890 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:17,536 INFO L93 Difference]: Finished difference Result 3500 states and 14971 transitions. [2022-11-20 09:30:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:17,547 INFO L225 Difference]: With dead ends: 3500 [2022-11-20 09:30:17,547 INFO L226 Difference]: Without dead ends: 3500 [2022-11-20 09:30:17,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:17,548 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:17,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2022-11-20 09:30:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2022-11-20 09:30:17,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 3480. [2022-11-20 09:30:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3480 states, 3466 states have (on average 4.2968840161569535) internal successors, (14893), 3479 states have internal predecessors, (14893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3480 states to 3480 states and 14893 transitions. [2022-11-20 09:30:17,644 INFO L78 Accepts]: Start accepts. Automaton has 3480 states and 14893 transitions. Word has length 12 [2022-11-20 09:30:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:17,644 INFO L495 AbstractCegarLoop]: Abstraction has 3480 states and 14893 transitions. [2022-11-20 09:30:17,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3480 states and 14893 transitions. [2022-11-20 09:30:17,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:17,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:17,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:17,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:17,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:17,858 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash 656833179, now seen corresponding path program 3 times [2022-11-20 09:30:17,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:17,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919102854] [2022-11-20 09:30:17,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:30:17,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:17,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:17,860 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:17,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:18,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:30:18,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:18,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:18,214 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:18,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:18,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:19,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919102854] [2022-11-20 09:30:19,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919102854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:19,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:19,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890256389] [2022-11-20 09:30:19,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:19,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:19,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:19,116 INFO L87 Difference]: Start difference. First operand 3480 states and 14893 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:19,685 INFO L93 Difference]: Finished difference Result 3508 states and 14995 transitions. [2022-11-20 09:30:19,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:30:19,687 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:19,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:19,696 INFO L225 Difference]: With dead ends: 3508 [2022-11-20 09:30:19,696 INFO L226 Difference]: Without dead ends: 3508 [2022-11-20 09:30:19,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:19,696 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:19,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-11-20 09:30:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2022-11-20 09:30:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3484. [2022-11-20 09:30:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3470 states have (on average 4.295389048991354) internal successors, (14905), 3483 states have internal predecessors, (14905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 14905 transitions. [2022-11-20 09:30:19,760 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 14905 transitions. Word has length 12 [2022-11-20 09:30:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:19,761 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 14905 transitions. [2022-11-20 09:30:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:19,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 14905 transitions. [2022-11-20 09:30:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:19,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:19,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:19,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-20 09:30:19,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:19,963 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1604055109, now seen corresponding path program 4 times [2022-11-20 09:30:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:19,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587773006] [2022-11-20 09:30:19,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:30:19,964 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 [2022-11-20 09:30:19,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:19,965 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:19,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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 [2022-11-20 09:30:20,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:30:20,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:20,276 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:20,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:20,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:21,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:21,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587773006] [2022-11-20 09:30:21,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587773006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:21,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:21,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:21,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110546860] [2022-11-20 09:30:21,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:21,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:21,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:21,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:21,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:21,219 INFO L87 Difference]: Start difference. First operand 3484 states and 14905 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:21,830 INFO L93 Difference]: Finished difference Result 3579 states and 15306 transitions. [2022-11-20 09:30:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:21,845 INFO L225 Difference]: With dead ends: 3579 [2022-11-20 09:30:21,845 INFO L226 Difference]: Without dead ends: 3579 [2022-11-20 09:30:21,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:21,846 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:21,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 60 Unchecked, 0.5s Time] [2022-11-20 09:30:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2022-11-20 09:30:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3488. [2022-11-20 09:30:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 3474 states have (on average 4.294185377086931) internal successors, (14918), 3487 states have internal predecessors, (14918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:21,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 14918 transitions. [2022-11-20 09:30:21,979 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 14918 transitions. Word has length 12 [2022-11-20 09:30:21,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:21,980 INFO L495 AbstractCegarLoop]: Abstraction has 3488 states and 14918 transitions. [2022-11-20 09:30:21,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 14918 transitions. [2022-11-20 09:30:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:21,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:21,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:22,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:22,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:22,195 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:22,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:22,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1437812959, now seen corresponding path program 5 times [2022-11-20 09:30:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851508247] [2022-11-20 09:30:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:30:22,196 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 [2022-11-20 09:30:22,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:22,198 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:22,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 09:30:22,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:22,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:22,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:30:22,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:22,536 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:22,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:22,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:23,668 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:23,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851508247] [2022-11-20 09:30:23,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851508247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:23,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:23,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:30:23,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509614532] [2022-11-20 09:30:23,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:30:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:30:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:30:23,670 INFO L87 Difference]: Start difference. First operand 3488 states and 14918 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 09:30:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:24,400 INFO L93 Difference]: Finished difference Result 3810 states and 16394 transitions. [2022-11-20 09:30:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:30:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 [2022-11-20 09:30:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:24,413 INFO L225 Difference]: With dead ends: 3810 [2022-11-20 09:30:24,413 INFO L226 Difference]: Without dead ends: 3810 [2022-11-20 09:30:24,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:30:24,414 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:24,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 20 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 85 Unchecked, 0.6s Time] [2022-11-20 09:30:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2022-11-20 09:30:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3534. [2022-11-20 09:30:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3520 states have (on average 4.289204545454545) internal successors, (15098), 3533 states have internal predecessors, (15098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 15098 transitions. [2022-11-20 09:30:24,507 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 15098 transitions. Word has length 12 [2022-11-20 09:30:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:24,507 INFO L495 AbstractCegarLoop]: Abstraction has 3534 states and 15098 transitions. [2022-11-20 09:30:24,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 09:30:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 15098 transitions. [2022-11-20 09:30:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:24,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:24,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:24,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:24,709 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1437821329, now seen corresponding path program 6 times [2022-11-20 09:30:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:24,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318438514] [2022-11-20 09:30:24,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:30:24,710 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 [2022-11-20 09:30:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:24,711 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:24,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 09:30:24,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:30:24,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:25,087 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:25,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:25,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:26,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:26,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318438514] [2022-11-20 09:30:26,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318438514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:26,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:26,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34840436] [2022-11-20 09:30:26,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:26,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:26,011 INFO L87 Difference]: Start difference. First operand 3534 states and 15098 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:27,155 INFO L93 Difference]: Finished difference Result 4511 states and 19599 transitions. [2022-11-20 09:30:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:30:27,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:27,167 INFO L225 Difference]: With dead ends: 4511 [2022-11-20 09:30:27,167 INFO L226 Difference]: Without dead ends: 4511 [2022-11-20 09:30:27,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:27,168 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 117 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:27,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 25 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 177 Invalid, 0 Unknown, 125 Unchecked, 1.0s Time] [2022-11-20 09:30:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2022-11-20 09:30:27,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3868. [2022-11-20 09:30:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3868 states, 3854 states have (on average 4.383757135443695) internal successors, (16895), 3867 states have internal predecessors, (16895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 16895 transitions. [2022-11-20 09:30:27,251 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 16895 transitions. Word has length 12 [2022-11-20 09:30:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:27,251 INFO L495 AbstractCegarLoop]: Abstraction has 3868 states and 16895 transitions. [2022-11-20 09:30:27,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:27,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 16895 transitions. [2022-11-20 09:30:27,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:27,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:27,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:27,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:27,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:27,465 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1437664159, now seen corresponding path program 7 times [2022-11-20 09:30:27,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:27,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605118274] [2022-11-20 09:30:27,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:30:27,466 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 [2022-11-20 09:30:27,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:27,467 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:27,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-20 09:30:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:27,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:27,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:27,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:28,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:28,633 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:28,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605118274] [2022-11-20 09:30:28,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605118274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:28,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:28,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:28,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006622200] [2022-11-20 09:30:28,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:28,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:28,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:28,634 INFO L87 Difference]: Start difference. First operand 3868 states and 16895 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:29,484 INFO L93 Difference]: Finished difference Result 4362 states and 19201 transitions. [2022-11-20 09:30:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:29,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:29,497 INFO L225 Difference]: With dead ends: 4362 [2022-11-20 09:30:29,498 INFO L226 Difference]: Without dead ends: 4362 [2022-11-20 09:30:29,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:29,498 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:29,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 30 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 157 Unchecked, 0.8s Time] [2022-11-20 09:30:29,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2022-11-20 09:30:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 3866. [2022-11-20 09:30:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3866 states, 3852 states have (on average 4.383696780893042) internal successors, (16886), 3865 states have internal predecessors, (16886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3866 states to 3866 states and 16886 transitions. [2022-11-20 09:30:29,628 INFO L78 Accepts]: Start accepts. Automaton has 3866 states and 16886 transitions. Word has length 12 [2022-11-20 09:30:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:29,628 INFO L495 AbstractCegarLoop]: Abstraction has 3866 states and 16886 transitions. [2022-11-20 09:30:29,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3866 states and 16886 transitions. [2022-11-20 09:30:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:29,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:29,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:29,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:29,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:29,842 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1277379990, now seen corresponding path program 1 times [2022-11-20 09:30:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784066018] [2022-11-20 09:30:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:29,843 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 [2022-11-20 09:30:29,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:29,844 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:29,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-20 09:30:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:30,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:30,190 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:30,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:30,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:31,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:31,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784066018] [2022-11-20 09:30:31,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784066018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:31,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:31,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:31,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742021018] [2022-11-20 09:30:31,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:31,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:31,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:31,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:31,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:31,038 INFO L87 Difference]: Start difference. First operand 3866 states and 16886 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:31,373 INFO L93 Difference]: Finished difference Result 4040 states and 17668 transitions. [2022-11-20 09:30:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:31,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:31,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:31,387 INFO L225 Difference]: With dead ends: 4040 [2022-11-20 09:30:31,387 INFO L226 Difference]: Without dead ends: 4040 [2022-11-20 09:30:31,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:31,388 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:31,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-11-20 09:30:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-11-20 09:30:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 3890. [2022-11-20 09:30:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3876 states have (on average 4.382352941176471) internal successors, (16986), 3889 states have internal predecessors, (16986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 16986 transitions. [2022-11-20 09:30:31,542 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 16986 transitions. Word has length 12 [2022-11-20 09:30:31,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:31,542 INFO L495 AbstractCegarLoop]: Abstraction has 3890 states and 16986 transitions. [2022-11-20 09:30:31,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:31,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 16986 transitions. [2022-11-20 09:30:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:31,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:31,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:31,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-20 09:30:31,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:31,745 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:31,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:31,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1277395800, now seen corresponding path program 2 times [2022-11-20 09:30:31,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:31,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096428684] [2022-11-20 09:30:31,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:31,747 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 [2022-11-20 09:30:31,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:31,748 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:31,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 09:30:31,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:31,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:31,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:31,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:32,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:32,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:32,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:33,076 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096428684] [2022-11-20 09:30:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096428684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:33,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:33,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531150295] [2022-11-20 09:30:33,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:33,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:33,078 INFO L87 Difference]: Start difference. First operand 3890 states and 16986 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:33,919 INFO L93 Difference]: Finished difference Result 4210 states and 18438 transitions. [2022-11-20 09:30:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:30:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:33,932 INFO L225 Difference]: With dead ends: 4210 [2022-11-20 09:30:33,932 INFO L226 Difference]: Without dead ends: 4210 [2022-11-20 09:30:33,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:33,933 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:33,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 77 Unchecked, 0.8s Time] [2022-11-20 09:30:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2022-11-20 09:30:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 4044. [2022-11-20 09:30:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4030 states have (on average 4.388833746898263) internal successors, (17687), 4043 states have internal predecessors, (17687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 17687 transitions. [2022-11-20 09:30:34,018 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 17687 transitions. Word has length 12 [2022-11-20 09:30:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:34,019 INFO L495 AbstractCegarLoop]: Abstraction has 4044 states and 17687 transitions. [2022-11-20 09:30:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 17687 transitions. [2022-11-20 09:30:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:34,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:34,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:34,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:34,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:34,221 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:34,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1311341730, now seen corresponding path program 3 times [2022-11-20 09:30:34,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:34,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878632059] [2022-11-20 09:30:34,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:30:34,222 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 [2022-11-20 09:30:34,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:34,223 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 09:30:34,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:30:34,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:34,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:34,584 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:34,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:34,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:35,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:35,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878632059] [2022-11-20 09:30:35,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878632059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:35,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:35,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:35,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765915068] [2022-11-20 09:30:35,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:35,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:35,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:35,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:35,413 INFO L87 Difference]: Start difference. First operand 4044 states and 17687 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:35,996 INFO L93 Difference]: Finished difference Result 4128 states and 18041 transitions. [2022-11-20 09:30:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:36,007 INFO L225 Difference]: With dead ends: 4128 [2022-11-20 09:30:36,008 INFO L226 Difference]: Without dead ends: 4128 [2022-11-20 09:30:36,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:36,008 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:36,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-20 09:30:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2022-11-20 09:30:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 4074. [2022-11-20 09:30:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4074 states, 4060 states have (on average 4.385960591133005) internal successors, (17807), 4073 states have internal predecessors, (17807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 17807 transitions. [2022-11-20 09:30:36,077 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 17807 transitions. Word has length 12 [2022-11-20 09:30:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:36,077 INFO L495 AbstractCegarLoop]: Abstraction has 4074 states and 17807 transitions. [2022-11-20 09:30:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 17807 transitions. [2022-11-20 09:30:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:36,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:36,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:36,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-20 09:30:36,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:36,292 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1307141199, now seen corresponding path program 1 times [2022-11-20 09:30:36,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510779783] [2022-11-20 09:30:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:36,292 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 [2022-11-20 09:30:36,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:36,293 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:36,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-20 09:30:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:36,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:36,609 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:36,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:36,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:37,439 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510779783] [2022-11-20 09:30:37,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510779783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:37,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:37,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109993031] [2022-11-20 09:30:37,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:37,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:37,442 INFO L87 Difference]: Start difference. First operand 4074 states and 17807 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:37,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:37,885 INFO L93 Difference]: Finished difference Result 4150 states and 18177 transitions. [2022-11-20 09:30:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:37,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:37,905 INFO L225 Difference]: With dead ends: 4150 [2022-11-20 09:30:37,905 INFO L226 Difference]: Without dead ends: 4150 [2022-11-20 09:30:37,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:37,906 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:37,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 64 Unchecked, 0.4s Time] [2022-11-20 09:30:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-20 09:30:37,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 4078. [2022-11-20 09:30:37,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4064 states have (on average 4.386564960629921) internal successors, (17827), 4077 states have internal predecessors, (17827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:38,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 17827 transitions. [2022-11-20 09:30:38,009 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 17827 transitions. Word has length 12 [2022-11-20 09:30:38,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:38,009 INFO L495 AbstractCegarLoop]: Abstraction has 4078 states and 17827 transitions. [2022-11-20 09:30:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 17827 transitions. [2022-11-20 09:30:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:38,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:38,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:38,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-20 09:30:38,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:38,211 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:38,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1306873080, now seen corresponding path program 4 times [2022-11-20 09:30:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:38,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040955007] [2022-11-20 09:30:38,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:30:38,212 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 [2022-11-20 09:30:38,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:38,213 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:38,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-20 09:30:38,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:30:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:38,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:38,530 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:38,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:38,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:39,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:39,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040955007] [2022-11-20 09:30:39,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040955007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:39,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:39,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:39,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36907002] [2022-11-20 09:30:39,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:39,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:39,462 INFO L87 Difference]: Start difference. First operand 4078 states and 17827 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:40,033 INFO L93 Difference]: Finished difference Result 4116 states and 17995 transitions. [2022-11-20 09:30:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:40,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:40,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:40,046 INFO L225 Difference]: With dead ends: 4116 [2022-11-20 09:30:40,046 INFO L226 Difference]: Without dead ends: 4116 [2022-11-20 09:30:40,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:40,046 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:40,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-20 09:30:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2022-11-20 09:30:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 4080. [2022-11-20 09:30:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4066 states have (on average 4.386374815543531) internal successors, (17835), 4079 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 17835 transitions. [2022-11-20 09:30:40,119 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 17835 transitions. Word has length 12 [2022-11-20 09:30:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:40,119 INFO L495 AbstractCegarLoop]: Abstraction has 4080 states and 17835 transitions. [2022-11-20 09:30:40,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:40,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 17835 transitions. [2022-11-20 09:30:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:40,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:40,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:40,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-20 09:30:40,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:40,321 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:40,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:40,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1306888890, now seen corresponding path program 5 times [2022-11-20 09:30:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:40,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867629075] [2022-11-20 09:30:40,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:30:40,323 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 [2022-11-20 09:30:40,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:40,324 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:40,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 09:30:40,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:40,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:40,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:30:40,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:40,690 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:40,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:41,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:41,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867629075] [2022-11-20 09:30:41,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867629075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:41,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:41,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:30:41,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14996326] [2022-11-20 09:30:41,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:41,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:30:41,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:41,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:30:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:30:41,729 INFO L87 Difference]: Start difference. First operand 4080 states and 17835 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 09:30:42,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:42,345 INFO L93 Difference]: Finished difference Result 4116 states and 17995 transitions. [2022-11-20 09:30:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:30:42,346 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 [2022-11-20 09:30:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:42,357 INFO L225 Difference]: With dead ends: 4116 [2022-11-20 09:30:42,357 INFO L226 Difference]: Without dead ends: 4116 [2022-11-20 09:30:42,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:30:42,357 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:42,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-11-20 09:30:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4116 states. [2022-11-20 09:30:42,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4116 to 4080. [2022-11-20 09:30:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4080 states, 4066 states have (on average 4.386374815543531) internal successors, (17835), 4079 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4080 states to 4080 states and 17835 transitions. [2022-11-20 09:30:42,492 INFO L78 Accepts]: Start accepts. Automaton has 4080 states and 17835 transitions. Word has length 12 [2022-11-20 09:30:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:42,492 INFO L495 AbstractCegarLoop]: Abstraction has 4080 states and 17835 transitions. [2022-11-20 09:30:42,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 09:30:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4080 states and 17835 transitions. [2022-11-20 09:30:42,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:42,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:42,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:42,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-20 09:30:42,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:42,694 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:42,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1306884519, now seen corresponding path program 2 times [2022-11-20 09:30:42,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:42,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094097625] [2022-11-20 09:30:42,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:42,695 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 [2022-11-20 09:30:42,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:42,696 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:42,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-20 09:30:42,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:42,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:42,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:43,059 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:43,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:43,898 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:43,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094097625] [2022-11-20 09:30:43,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094097625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:43,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:43,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:43,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357248037] [2022-11-20 09:30:43,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:43,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:43,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:43,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:43,899 INFO L87 Difference]: Start difference. First operand 4080 states and 17835 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:44,590 INFO L93 Difference]: Finished difference Result 4202 states and 18445 transitions. [2022-11-20 09:30:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:30:44,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:44,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:44,606 INFO L225 Difference]: With dead ends: 4202 [2022-11-20 09:30:44,606 INFO L226 Difference]: Without dead ends: 4202 [2022-11-20 09:30:44,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:44,607 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:44,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 30 Unchecked, 0.6s Time] [2022-11-20 09:30:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2022-11-20 09:30:44,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 4124. [2022-11-20 09:30:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4124 states, 4110 states have (on average 4.3934306569343065) internal successors, (18057), 4123 states have internal predecessors, (18057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4124 states to 4124 states and 18057 transitions. [2022-11-20 09:30:44,702 INFO L78 Accepts]: Start accepts. Automaton has 4124 states and 18057 transitions. Word has length 12 [2022-11-20 09:30:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:44,702 INFO L495 AbstractCegarLoop]: Abstraction has 4124 states and 18057 transitions. [2022-11-20 09:30:44,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4124 states and 18057 transitions. [2022-11-20 09:30:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 09:30:44,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:44,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:44,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-20 09:30:44,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:44,904 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:44,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1306737579, now seen corresponding path program 3 times [2022-11-20 09:30:44,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:44,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951494209] [2022-11-20 09:30:44,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:30:44,905 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 [2022-11-20 09:30:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:44,906 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:44,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-20 09:30:45,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:30:45,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:30:45,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:45,259 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:45,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:45,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:30:46,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951494209] [2022-11-20 09:30:46,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951494209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:46,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:46,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:30:46,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043171649] [2022-11-20 09:30:46,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:46,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:30:46,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:46,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:30:46,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:30:46,173 INFO L87 Difference]: Start difference. First operand 4124 states and 18057 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:46,791 INFO L93 Difference]: Finished difference Result 4188 states and 18369 transitions. [2022-11-20 09:30:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:30:46,793 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-11-20 09:30:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:46,809 INFO L225 Difference]: With dead ends: 4188 [2022-11-20 09:30:46,810 INFO L226 Difference]: Without dead ends: 4188 [2022-11-20 09:30:46,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:30:46,810 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:46,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-11-20 09:30:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2022-11-20 09:30:46,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 4152. [2022-11-20 09:30:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4152 states, 4138 states have (on average 4.397535041082649) internal successors, (18197), 4151 states have internal predecessors, (18197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:30:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 18197 transitions. [2022-11-20 09:30:46,958 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 18197 transitions. Word has length 12 [2022-11-20 09:30:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:46,959 INFO L495 AbstractCegarLoop]: Abstraction has 4152 states and 18197 transitions. [2022-11-20 09:30:46,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-11-20 09:30:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 18197 transitions. [2022-11-20 09:30:46,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:30:46,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:46,962 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 09:30:46,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-20 09:30:47,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:30:47,162 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:30:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1092461316, now seen corresponding path program 4 times [2022-11-20 09:30:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:30:47,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797781466] [2022-11-20 09:30:47,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:30:47,163 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 [2022-11-20 09:30:47,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:30:47,165 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:30:47,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 09:30:47,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:30:47,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:30:47,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:47,543 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:30:47,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:30:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:48,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:30:50,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:30:50,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797781466] [2022-11-20 09:30:50,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797781466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:50,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:50,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-20 09:30:50,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67232841] [2022-11-20 09:30:50,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:50,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:30:50,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:30:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:30:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:30:50,405 INFO L87 Difference]: Start difference. First operand 4152 states and 18197 transitions. Second operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:20,192 INFO L93 Difference]: Finished difference Result 8608 states and 37219 transitions. [2022-11-20 09:31:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 09:31:20,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:31:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:20,218 INFO L225 Difference]: With dead ends: 8608 [2022-11-20 09:31:20,219 INFO L226 Difference]: Without dead ends: 8608 [2022-11-20 09:31:20,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 09:31:20,219 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1251 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 3467 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 3505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:20,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 507 Invalid, 3505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3467 Invalid, 0 Unknown, 0 Unchecked, 18.9s Time] [2022-11-20 09:31:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2022-11-20 09:31:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 5651. [2022-11-20 09:31:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5651 states, 5637 states have (on average 4.4557388681923005) internal successors, (25117), 5650 states have internal predecessors, (25117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5651 states to 5651 states and 25117 transitions. [2022-11-20 09:31:20,362 INFO L78 Accepts]: Start accepts. Automaton has 5651 states and 25117 transitions. Word has length 13 [2022-11-20 09:31:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:20,363 INFO L495 AbstractCegarLoop]: Abstraction has 5651 states and 25117 transitions. [2022-11-20 09:31:20,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 5651 states and 25117 transitions. [2022-11-20 09:31:20,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:31:20,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:20,364 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-20 09:31:20,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-20 09:31:20,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:20,565 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:31:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -777406975, now seen corresponding path program 5 times [2022-11-20 09:31:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:20,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372527065] [2022-11-20 09:31:20,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:20,566 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 [2022-11-20 09:31:20,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:20,567 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:31:20,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 09:31:20,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 09:31:20,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:20,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:31:20,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:20,939 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:20,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:21,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:31:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:31:21,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:21,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:31:21,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:31:21,784 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:31:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:24,017 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:24,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372527065] [2022-11-20 09:31:24,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372527065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:24,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:24,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-11-20 09:31:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978954570] [2022-11-20 09:31:24,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:24,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:31:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:31:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:31:24,019 INFO L87 Difference]: Start difference. First operand 5651 states and 25117 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:37,526 INFO L93 Difference]: Finished difference Result 7155 states and 32158 transitions. [2022-11-20 09:31:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:31:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:31:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:37,549 INFO L225 Difference]: With dead ends: 7155 [2022-11-20 09:31:37,549 INFO L226 Difference]: Without dead ends: 7155 [2022-11-20 09:31:37,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-11-20 09:31:37,550 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 362 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:37,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 271 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1434 Invalid, 0 Unknown, 373 Unchecked, 9.0s Time] [2022-11-20 09:31:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7155 states. [2022-11-20 09:31:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7155 to 5654. [2022-11-20 09:31:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5640 states have (on average 4.454787234042553) internal successors, (25125), 5653 states have internal predecessors, (25125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 25125 transitions. [2022-11-20 09:31:37,711 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 25125 transitions. Word has length 13 [2022-11-20 09:31:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:37,711 INFO L495 AbstractCegarLoop]: Abstraction has 5654 states and 25125 transitions. [2022-11-20 09:31:37,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 25125 transitions. [2022-11-20 09:31:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:31:37,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:37,713 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:37,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:37,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:37,914 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:31:37,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:37,914 INFO L85 PathProgramCache]: Analyzing trace with hash 906890364, now seen corresponding path program 5 times [2022-11-20 09:31:37,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:37,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383033906] [2022-11-20 09:31:37,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:31:37,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:37,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:37,916 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:31:37,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-20 09:31:38,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:31:38,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:38,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:31:38,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:38,285 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:38,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:38,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:38,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:31:38,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:31:38,890 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:31:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:40,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:31:40,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383033906] [2022-11-20 09:31:40,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383033906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:40,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:31:40,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:31:40,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220278319] [2022-11-20 09:31:40,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:40,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 09:31:40,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:31:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 09:31:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:31:40,565 INFO L87 Difference]: Start difference. First operand 5654 states and 25125 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:31:58,265 INFO L93 Difference]: Finished difference Result 12716 states and 55737 transitions. [2022-11-20 09:31:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 09:31:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:31:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:31:58,310 INFO L225 Difference]: With dead ends: 12716 [2022-11-20 09:31:58,311 INFO L226 Difference]: Without dead ends: 12716 [2022-11-20 09:31:58,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2022-11-20 09:31:58,311 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 530 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 478 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:31:58,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 176 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 941 Invalid, 0 Unknown, 478 Unchecked, 10.5s Time] [2022-11-20 09:31:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12716 states. [2022-11-20 09:31:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12716 to 7219. [2022-11-20 09:31:58,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7219 states, 7205 states have (on average 4.512977099236641) internal successors, (32516), 7218 states have internal predecessors, (32516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7219 states to 7219 states and 32516 transitions. [2022-11-20 09:31:58,512 INFO L78 Accepts]: Start accepts. Automaton has 7219 states and 32516 transitions. Word has length 13 [2022-11-20 09:31:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:31:58,512 INFO L495 AbstractCegarLoop]: Abstraction has 7219 states and 32516 transitions. [2022-11-20 09:31:58,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 7219 states and 32516 transitions. [2022-11-20 09:31:58,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:31:58,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:31:58,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:58,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-20 09:31:58,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:31:58,715 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:31:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:58,715 INFO L85 PathProgramCache]: Analyzing trace with hash 906886055, now seen corresponding path program 4 times [2022-11-20 09:31:58,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:31:58,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761090167] [2022-11-20 09:31:58,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:31:58,716 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 [2022-11-20 09:31:58,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:31:58,717 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:31:58,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-20 09:31:58,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:31:58,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:31:58,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:31:58,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:59,061 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:31:59,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:31:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:59,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:00,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:00,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761090167] [2022-11-20 09:32:00,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761090167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:00,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:00,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:32:00,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878559183] [2022-11-20 09:32:00,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:00,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:32:00,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:32:00,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:32:00,784 INFO L87 Difference]: Start difference. First operand 7219 states and 32516 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:06,598 INFO L93 Difference]: Finished difference Result 11887 states and 52771 transitions. [2022-11-20 09:32:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:32:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:06,640 INFO L225 Difference]: With dead ends: 11887 [2022-11-20 09:32:06,640 INFO L226 Difference]: Without dead ends: 11887 [2022-11-20 09:32:06,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:32:06,640 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 299 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:06,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 76 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 521 Invalid, 0 Unknown, 401 Unchecked, 3.8s Time] [2022-11-20 09:32:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2022-11-20 09:32:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 8167. [2022-11-20 09:32:06,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8167 states, 8153 states have (on average 4.552802649331534) internal successors, (37119), 8166 states have internal predecessors, (37119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 37119 transitions. [2022-11-20 09:32:06,838 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 37119 transitions. Word has length 13 [2022-11-20 09:32:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:06,838 INFO L495 AbstractCegarLoop]: Abstraction has 8167 states and 37119 transitions. [2022-11-20 09:32:06,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 37119 transitions. [2022-11-20 09:32:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:06,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:06,841 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:06,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-20 09:32:07,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:07,042 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1570585359, now seen corresponding path program 1 times [2022-11-20 09:32:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:07,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1788447753] [2022-11-20 09:32:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:07,043 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 [2022-11-20 09:32:07,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:07,043 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:07,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 09:32:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:07,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:07,372 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:07,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:07,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:08,276 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:08,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1788447753] [2022-11-20 09:32:08,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1788447753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:08,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:08,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199284578] [2022-11-20 09:32:08,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:08,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:08,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:08,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:08,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:08,278 INFO L87 Difference]: Start difference. First operand 8167 states and 37119 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:08,834 INFO L93 Difference]: Finished difference Result 8405 states and 38183 transitions. [2022-11-20 09:32:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:32:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:08,863 INFO L225 Difference]: With dead ends: 8405 [2022-11-20 09:32:08,863 INFO L226 Difference]: Without dead ends: 8405 [2022-11-20 09:32:08,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:08,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:08,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-11-20 09:32:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8405 states. [2022-11-20 09:32:08,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8405 to 8168. [2022-11-20 09:32:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8168 states, 8154 states have (on average 4.552612214863871) internal successors, (37122), 8167 states have internal predecessors, (37122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8168 states to 8168 states and 37122 transitions. [2022-11-20 09:32:09,034 INFO L78 Accepts]: Start accepts. Automaton has 8168 states and 37122 transitions. Word has length 13 [2022-11-20 09:32:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:09,035 INFO L495 AbstractCegarLoop]: Abstraction has 8168 states and 37122 transitions. [2022-11-20 09:32:09,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 8168 states and 37122 transitions. [2022-11-20 09:32:09,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:09,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:09,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:09,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-20 09:32:09,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:09,241 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1575947739, now seen corresponding path program 2 times [2022-11-20 09:32:09,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:09,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469710847] [2022-11-20 09:32:09,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:09,242 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 [2022-11-20 09:32:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:09,243 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:09,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-20 09:32:09,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:09,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:09,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:09,624 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:09,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:09,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:10,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:10,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469710847] [2022-11-20 09:32:10,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469710847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:10,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:10,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192079975] [2022-11-20 09:32:10,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:10,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:10,487 INFO L87 Difference]: Start difference. First operand 8168 states and 37122 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:10,709 INFO L93 Difference]: Finished difference Result 8432 states and 38255 transitions. [2022-11-20 09:32:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:10,802 INFO L225 Difference]: With dead ends: 8432 [2022-11-20 09:32:10,802 INFO L226 Difference]: Without dead ends: 8432 [2022-11-20 09:32:10,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:10,803 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:10,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-20 09:32:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8432 states. [2022-11-20 09:32:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8432 to 8186. [2022-11-20 09:32:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8186 states, 8172 states have (on average 4.549192364170338) internal successors, (37176), 8185 states have internal predecessors, (37176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8186 states to 8186 states and 37176 transitions. [2022-11-20 09:32:10,959 INFO L78 Accepts]: Start accepts. Automaton has 8186 states and 37176 transitions. Word has length 13 [2022-11-20 09:32:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:10,959 INFO L495 AbstractCegarLoop]: Abstraction has 8186 states and 37176 transitions. [2022-11-20 09:32:10,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 8186 states and 37176 transitions. [2022-11-20 09:32:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:10,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:10,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:10,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-20 09:32:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:11,162 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1575960759, now seen corresponding path program 3 times [2022-11-20 09:32:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:11,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103320154] [2022-11-20 09:32:11,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:11,163 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 [2022-11-20 09:32:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:11,163 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:11,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 09:32:11,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:32:11,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:11,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:11,527 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:11,527 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:11,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:32:12,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:12,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103320154] [2022-11-20 09:32:12,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103320154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:12,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:12,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:12,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647370105] [2022-11-20 09:32:12,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:12,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:12,400 INFO L87 Difference]: Start difference. First operand 8186 states and 37176 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:13,237 INFO L93 Difference]: Finished difference Result 10107 states and 46478 transitions. [2022-11-20 09:32:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:32:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:13,273 INFO L225 Difference]: With dead ends: 10107 [2022-11-20 09:32:13,273 INFO L226 Difference]: Without dead ends: 10107 [2022-11-20 09:32:13,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:13,274 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:13,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 20 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 87 Unchecked, 0.7s Time] [2022-11-20 09:32:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10107 states. [2022-11-20 09:32:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10107 to 8181. [2022-11-20 09:32:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8167 states have (on average 4.55014081057916) internal successors, (37161), 8180 states have internal predecessors, (37161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 37161 transitions. [2022-11-20 09:32:13,531 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 37161 transitions. Word has length 13 [2022-11-20 09:32:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:13,531 INFO L495 AbstractCegarLoop]: Abstraction has 8181 states and 37161 transitions. [2022-11-20 09:32:13,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 37161 transitions. [2022-11-20 09:32:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:13,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:13,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:13,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-20 09:32:13,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:13,734 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -946061076, now seen corresponding path program 1 times [2022-11-20 09:32:13,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:13,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547135521] [2022-11-20 09:32:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:13,734 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 [2022-11-20 09:32:13,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:13,735 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:13,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 09:32:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:13,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:14,072 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:14,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:14,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:14,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:14,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547135521] [2022-11-20 09:32:14,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547135521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:14,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:14,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673492464] [2022-11-20 09:32:14,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:14,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:14,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:14,938 INFO L87 Difference]: Start difference. First operand 8181 states and 37161 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:15,640 INFO L93 Difference]: Finished difference Result 9060 states and 41705 transitions. [2022-11-20 09:32:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:15,682 INFO L225 Difference]: With dead ends: 9060 [2022-11-20 09:32:15,682 INFO L226 Difference]: Without dead ends: 9060 [2022-11-20 09:32:15,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:15,683 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:15,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 33 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2022-11-20 09:32:15,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9060 states. [2022-11-20 09:32:15,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9060 to 8181. [2022-11-20 09:32:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8181 states, 8167 states have (on average 4.55014081057916) internal successors, (37161), 8180 states have internal predecessors, (37161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8181 states to 8181 states and 37161 transitions. [2022-11-20 09:32:15,978 INFO L78 Accepts]: Start accepts. Automaton has 8181 states and 37161 transitions. Word has length 13 [2022-11-20 09:32:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:15,978 INFO L495 AbstractCegarLoop]: Abstraction has 8181 states and 37161 transitions. [2022-11-20 09:32:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 8181 states and 37161 transitions. [2022-11-20 09:32:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:15,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:15,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:15,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:16,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:16,194 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:16,195 INFO L85 PathProgramCache]: Analyzing trace with hash -946057077, now seen corresponding path program 4 times [2022-11-20 09:32:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:16,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543902341] [2022-11-20 09:32:16,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:32:16,196 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 [2022-11-20 09:32:16,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:16,197 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:16,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-20 09:32:16,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:32:16,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:16,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:16,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:16,567 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:16,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:16,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:17,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:17,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543902341] [2022-11-20 09:32:17,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543902341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:17,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:17,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:17,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865625108] [2022-11-20 09:32:17,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:17,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:17,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:17,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:17,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:17,401 INFO L87 Difference]: Start difference. First operand 8181 states and 37161 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:17,972 INFO L93 Difference]: Finished difference Result 8398 states and 38162 transitions. [2022-11-20 09:32:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:17,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:17,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:18,000 INFO L225 Difference]: With dead ends: 8398 [2022-11-20 09:32:18,000 INFO L226 Difference]: Without dead ends: 8398 [2022-11-20 09:32:18,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:18,001 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:18,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 28 Unchecked, 0.5s Time] [2022-11-20 09:32:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8398 states. [2022-11-20 09:32:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8398 to 8182. [2022-11-20 09:32:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8182 states, 8168 states have (on average 4.550073457394711) internal successors, (37165), 8181 states have internal predecessors, (37165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:18,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8182 states to 8182 states and 37165 transitions. [2022-11-20 09:32:18,248 INFO L78 Accepts]: Start accepts. Automaton has 8182 states and 37165 transitions. Word has length 13 [2022-11-20 09:32:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:18,249 INFO L495 AbstractCegarLoop]: Abstraction has 8182 states and 37165 transitions. [2022-11-20 09:32:18,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 8182 states and 37165 transitions. [2022-11-20 09:32:18,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:18,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:18,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:18,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-20 09:32:18,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:18,451 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash -946190346, now seen corresponding path program 2 times [2022-11-20 09:32:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:18,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [571425901] [2022-11-20 09:32:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:18,452 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 [2022-11-20 09:32:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:18,453 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:18,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 09:32:18,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:18,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:18,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:18,839 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:18,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:19,749 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:19,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [571425901] [2022-11-20 09:32:19,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [571425901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:19,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:19,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:19,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285553958] [2022-11-20 09:32:19,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:19,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:19,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:19,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:19,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:19,750 INFO L87 Difference]: Start difference. First operand 8182 states and 37165 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:20,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:20,446 INFO L93 Difference]: Finished difference Result 10024 states and 46537 transitions. [2022-11-20 09:32:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:20,481 INFO L225 Difference]: With dead ends: 10024 [2022-11-20 09:32:20,481 INFO L226 Difference]: Without dead ends: 10024 [2022-11-20 09:32:20,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:20,481 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:20,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2022-11-20 09:32:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10024 states. [2022-11-20 09:32:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10024 to 8903. [2022-11-20 09:32:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8903 states, 8889 states have (on average 4.623129710878614) internal successors, (41095), 8902 states have internal predecessors, (41095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 41095 transitions. [2022-11-20 09:32:20,759 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 41095 transitions. Word has length 13 [2022-11-20 09:32:20,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:20,759 INFO L495 AbstractCegarLoop]: Abstraction has 8903 states and 41095 transitions. [2022-11-20 09:32:20,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:20,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 41095 transitions. [2022-11-20 09:32:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:20,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:20,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:20,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-20 09:32:20,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:20,965 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:20,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash -946066377, now seen corresponding path program 5 times [2022-11-20 09:32:20,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:20,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432059358] [2022-11-20 09:32:20,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:32:20,966 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 [2022-11-20 09:32:20,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:20,967 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:20,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 09:32:21,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:21,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:32:21,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:21,427 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:21,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:21,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:22,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:22,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432059358] [2022-11-20 09:32:22,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432059358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:22,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:22,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:32:22,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256803799] [2022-11-20 09:32:22,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:22,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:32:22,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:32:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:32:22,559 INFO L87 Difference]: Start difference. First operand 8903 states and 41095 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:23,179 INFO L93 Difference]: Finished difference Result 9062 states and 41814 transitions. [2022-11-20 09:32:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:23,212 INFO L225 Difference]: With dead ends: 9062 [2022-11-20 09:32:23,212 INFO L226 Difference]: Without dead ends: 9062 [2022-11-20 09:32:23,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:32:23,213 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:23,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-20 09:32:23,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9062 states. [2022-11-20 09:32:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9062 to 8903. [2022-11-20 09:32:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8903 states, 8889 states have (on average 4.623129710878614) internal successors, (41095), 8902 states have internal predecessors, (41095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 41095 transitions. [2022-11-20 09:32:23,513 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 41095 transitions. Word has length 13 [2022-11-20 09:32:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:23,513 INFO L495 AbstractCegarLoop]: Abstraction has 8903 states and 41095 transitions. [2022-11-20 09:32:23,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 41095 transitions. [2022-11-20 09:32:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:23,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:23,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:23,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-20 09:32:23,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:23,716 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:23,717 INFO L85 PathProgramCache]: Analyzing trace with hash -945238956, now seen corresponding path program 3 times [2022-11-20 09:32:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200751558] [2022-11-20 09:32:23,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:23,717 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 [2022-11-20 09:32:23,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:23,718 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:23,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-20 09:32:23,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:32:23,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:23,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:23,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:24,153 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:24,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:24,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:25,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:25,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200751558] [2022-11-20 09:32:25,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200751558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:25,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:25,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119573861] [2022-11-20 09:32:25,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:25,143 INFO L87 Difference]: Start difference. First operand 8903 states and 41095 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:25,797 INFO L93 Difference]: Finished difference Result 9296 states and 43166 transitions. [2022-11-20 09:32:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:32:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:25,828 INFO L225 Difference]: With dead ends: 9296 [2022-11-20 09:32:25,828 INFO L226 Difference]: Without dead ends: 9296 [2022-11-20 09:32:25,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:25,828 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:25,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-11-20 09:32:25,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9296 states. [2022-11-20 09:32:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9296 to 8969. [2022-11-20 09:32:25,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8955 states have (on average 4.631267448352875) internal successors, (41473), 8968 states have internal predecessors, (41473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 41473 transitions. [2022-11-20 09:32:26,021 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 41473 transitions. Word has length 13 [2022-11-20 09:32:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:26,022 INFO L495 AbstractCegarLoop]: Abstraction has 8969 states and 41473 transitions. [2022-11-20 09:32:26,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 41473 transitions. [2022-11-20 09:32:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:26,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:26,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:26,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-20 09:32:26,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:26,225 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1112290857, now seen corresponding path program 6 times [2022-11-20 09:32:26,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:26,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450612213] [2022-11-20 09:32:26,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:32:26,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:26,227 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:26,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 09:32:26,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:32:26,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:26,584 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:26,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:26,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:27,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:27,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450612213] [2022-11-20 09:32:27,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450612213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:27,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:27,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:27,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83475253] [2022-11-20 09:32:27,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:27,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:27,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:27,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:27,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:27,538 INFO L87 Difference]: Start difference. First operand 8969 states and 41473 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:28,216 INFO L93 Difference]: Finished difference Result 10854 states and 50812 transitions. [2022-11-20 09:32:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:28,254 INFO L225 Difference]: With dead ends: 10854 [2022-11-20 09:32:28,254 INFO L226 Difference]: Without dead ends: 10854 [2022-11-20 09:32:28,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:28,255 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:28,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 72 Unchecked, 0.6s Time] [2022-11-20 09:32:28,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10854 states. [2022-11-20 09:32:28,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10854 to 9549. [2022-11-20 09:32:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9549 states, 9535 states have (on average 4.66953329837441) internal successors, (44524), 9548 states have internal predecessors, (44524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9549 states to 9549 states and 44524 transitions. [2022-11-20 09:32:28,617 INFO L78 Accepts]: Start accepts. Automaton has 9549 states and 44524 transitions. Word has length 13 [2022-11-20 09:32:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:28,623 INFO L495 AbstractCegarLoop]: Abstraction has 9549 states and 44524 transitions. [2022-11-20 09:32:28,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 9549 states and 44524 transitions. [2022-11-20 09:32:28,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:28,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:28,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:28,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:28,829 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1112300157, now seen corresponding path program 7 times [2022-11-20 09:32:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714048419] [2022-11-20 09:32:28,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:32:28,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:28,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:28,831 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:28,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 09:32:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:29,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:29,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:29,224 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:29,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:29,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:30,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:30,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714048419] [2022-11-20 09:32:30,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714048419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:30,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:30,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:30,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571179394] [2022-11-20 09:32:30,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:30,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:30,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:30,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:30,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:30,237 INFO L87 Difference]: Start difference. First operand 9549 states and 44524 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:30,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:30,977 INFO L93 Difference]: Finished difference Result 10368 states and 48636 transitions. [2022-11-20 09:32:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:32:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:31,017 INFO L225 Difference]: With dead ends: 10368 [2022-11-20 09:32:31,017 INFO L226 Difference]: Without dead ends: 10368 [2022-11-20 09:32:31,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:31,018 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:31,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 120 Unchecked, 0.6s Time] [2022-11-20 09:32:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2022-11-20 09:32:31,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 9549. [2022-11-20 09:32:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9549 states, 9535 states have (on average 4.66953329837441) internal successors, (44524), 9548 states have internal predecessors, (44524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9549 states to 9549 states and 44524 transitions. [2022-11-20 09:32:31,352 INFO L78 Accepts]: Start accepts. Automaton has 9549 states and 44524 transitions. Word has length 13 [2022-11-20 09:32:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:31,352 INFO L495 AbstractCegarLoop]: Abstraction has 9549 states and 44524 transitions. [2022-11-20 09:32:31,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9549 states and 44524 transitions. [2022-11-20 09:32:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:31,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:31,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:31,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-20 09:32:31,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:31,555 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:31,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1112694477, now seen corresponding path program 8 times [2022-11-20 09:32:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:31,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516441913] [2022-11-20 09:32:31,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:31,556 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 [2022-11-20 09:32:31,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:31,557 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:31,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-20 09:32:31,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:31,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:31,936 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:31,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:32,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:32,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:32,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516441913] [2022-11-20 09:32:32,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516441913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:32,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:32,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:32,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995298795] [2022-11-20 09:32:32,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:32,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:32,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:32,891 INFO L87 Difference]: Start difference. First operand 9549 states and 44524 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:33,212 INFO L93 Difference]: Finished difference Result 9729 states and 45312 transitions. [2022-11-20 09:32:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:32:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:33,249 INFO L225 Difference]: With dead ends: 9729 [2022-11-20 09:32:33,249 INFO L226 Difference]: Without dead ends: 9729 [2022-11-20 09:32:33,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:33,249 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:33,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 18 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 09:32:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9729 states. [2022-11-20 09:32:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9729 to 9530. [2022-11-20 09:32:33,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9530 states, 9516 states have (on average 4.667927700714586) internal successors, (44420), 9529 states have internal predecessors, (44420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9530 states to 9530 states and 44420 transitions. [2022-11-20 09:32:33,455 INFO L78 Accepts]: Start accepts. Automaton has 9530 states and 44420 transitions. Word has length 13 [2022-11-20 09:32:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:33,455 INFO L495 AbstractCegarLoop]: Abstraction has 9530 states and 44420 transitions. [2022-11-20 09:32:33,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 9530 states and 44420 transitions. [2022-11-20 09:32:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:33,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:33,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:33,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-20 09:32:33,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:33,658 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1113005097, now seen corresponding path program 9 times [2022-11-20 09:32:33,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:33,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890862069] [2022-11-20 09:32:33,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:33,659 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 [2022-11-20 09:32:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:33,660 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:33,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 09:32:33,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:32:33,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:33,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:33,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:34,039 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:34,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:34,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:35,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:35,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890862069] [2022-11-20 09:32:35,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890862069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:35,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:35,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129282285] [2022-11-20 09:32:35,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:35,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:35,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:35,053 INFO L87 Difference]: Start difference. First operand 9530 states and 44420 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:36,052 INFO L93 Difference]: Finished difference Result 11359 states and 53047 transitions. [2022-11-20 09:32:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:36,054 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:36,095 INFO L225 Difference]: With dead ends: 11359 [2022-11-20 09:32:36,095 INFO L226 Difference]: Without dead ends: 11359 [2022-11-20 09:32:36,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:36,096 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:36,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 18 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 86 Unchecked, 0.9s Time] [2022-11-20 09:32:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11359 states. [2022-11-20 09:32:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11359 to 9659. [2022-11-20 09:32:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9659 states, 9645 states have (on average 4.680559875583204) internal successors, (45144), 9658 states have internal predecessors, (45144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9659 states to 9659 states and 45144 transitions. [2022-11-20 09:32:36,485 INFO L78 Accepts]: Start accepts. Automaton has 9659 states and 45144 transitions. Word has length 13 [2022-11-20 09:32:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:36,485 INFO L495 AbstractCegarLoop]: Abstraction has 9659 states and 45144 transitions. [2022-11-20 09:32:36,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9659 states and 45144 transitions. [2022-11-20 09:32:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:36,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:36,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:36,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-20 09:32:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:36,690 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1818305562, now seen corresponding path program 4 times [2022-11-20 09:32:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:36,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480801115] [2022-11-20 09:32:36,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:32:36,691 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 [2022-11-20 09:32:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:36,692 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:36,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 09:32:36,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:32:36,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:37,068 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:37,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:37,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:38,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:38,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480801115] [2022-11-20 09:32:38,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480801115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:38,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:38,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:38,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295672338] [2022-11-20 09:32:38,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:38,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:38,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:38,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:38,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:38,015 INFO L87 Difference]: Start difference. First operand 9659 states and 45144 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:38,719 INFO L93 Difference]: Finished difference Result 9906 states and 46351 transitions. [2022-11-20 09:32:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:38,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:38,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:38,767 INFO L225 Difference]: With dead ends: 9906 [2022-11-20 09:32:38,767 INFO L226 Difference]: Without dead ends: 9906 [2022-11-20 09:32:38,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:38,767 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:38,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-11-20 09:32:38,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9906 states. [2022-11-20 09:32:39,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9906 to 9663. [2022-11-20 09:32:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9663 states, 9649 states have (on average 4.680588662037517) internal successors, (45163), 9662 states have internal predecessors, (45163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9663 states to 9663 states and 45163 transitions. [2022-11-20 09:32:39,112 INFO L78 Accepts]: Start accepts. Automaton has 9663 states and 45163 transitions. Word has length 13 [2022-11-20 09:32:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:39,112 INFO L495 AbstractCegarLoop]: Abstraction has 9663 states and 45163 transitions. [2022-11-20 09:32:39,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9663 states and 45163 transitions. [2022-11-20 09:32:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:39,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:39,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:39,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-20 09:32:39,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:39,315 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:39,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1818297192, now seen corresponding path program 5 times [2022-11-20 09:32:39,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:39,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336890945] [2022-11-20 09:32:39,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:32:39,316 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 [2022-11-20 09:32:39,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:39,317 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:39,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-20 09:32:39,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:32:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:39,715 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:39,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:40,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:40,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336890945] [2022-11-20 09:32:40,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336890945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:40,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:40,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:32:40,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278694415] [2022-11-20 09:32:40,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:40,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:32:40,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:32:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:32:40,936 INFO L87 Difference]: Start difference. First operand 9663 states and 45163 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:41,591 INFO L93 Difference]: Finished difference Result 10394 states and 48605 transitions. [2022-11-20 09:32:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:41,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:41,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:41,631 INFO L225 Difference]: With dead ends: 10394 [2022-11-20 09:32:41,631 INFO L226 Difference]: Without dead ends: 10394 [2022-11-20 09:32:41,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:32:41,631 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:41,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 21 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-11-20 09:32:41,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2022-11-20 09:32:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 9704. [2022-11-20 09:32:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9704 states, 9690 states have (on average 4.67719298245614) internal successors, (45322), 9703 states have internal predecessors, (45322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:41,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9704 states to 9704 states and 45322 transitions. [2022-11-20 09:32:41,964 INFO L78 Accepts]: Start accepts. Automaton has 9704 states and 45322 transitions. Word has length 13 [2022-11-20 09:32:41,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:41,964 INFO L495 AbstractCegarLoop]: Abstraction has 9704 states and 45322 transitions. [2022-11-20 09:32:41,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:41,964 INFO L276 IsEmpty]: Start isEmpty. Operand 9704 states and 45322 transitions. [2022-11-20 09:32:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:41,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:41,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:41,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-20 09:32:42,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:42,169 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1813901082, now seen corresponding path program 6 times [2022-11-20 09:32:42,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:42,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493626705] [2022-11-20 09:32:42,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:32:42,170 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 [2022-11-20 09:32:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:42,172 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:42,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 09:32:42,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:32:42,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:42,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:42,588 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:42,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:42,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:43,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:43,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493626705] [2022-11-20 09:32:43,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493626705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:43,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:43,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:43,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80122025] [2022-11-20 09:32:43,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:43,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:43,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:43,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:43,563 INFO L87 Difference]: Start difference. First operand 9704 states and 45322 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:44,340 INFO L93 Difference]: Finished difference Result 10790 states and 50790 transitions. [2022-11-20 09:32:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:44,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:44,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:44,377 INFO L225 Difference]: With dead ends: 10790 [2022-11-20 09:32:44,377 INFO L226 Difference]: Without dead ends: 10790 [2022-11-20 09:32:44,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:44,378 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:44,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 33 Unchecked, 0.7s Time] [2022-11-20 09:32:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10790 states. [2022-11-20 09:32:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10790 to 9704. [2022-11-20 09:32:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9704 states, 9690 states have (on average 4.67719298245614) internal successors, (45322), 9703 states have internal predecessors, (45322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9704 states to 9704 states and 45322 transitions. [2022-11-20 09:32:44,748 INFO L78 Accepts]: Start accepts. Automaton has 9704 states and 45322 transitions. Word has length 13 [2022-11-20 09:32:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:44,748 INFO L495 AbstractCegarLoop]: Abstraction has 9704 states and 45322 transitions. [2022-11-20 09:32:44,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 9704 states and 45322 transitions. [2022-11-20 09:32:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:44,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:44,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:44,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-20 09:32:44,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:44,951 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1813897083, now seen corresponding path program 10 times [2022-11-20 09:32:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [766795933] [2022-11-20 09:32:44,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:32:44,952 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 [2022-11-20 09:32:44,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:44,953 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:44,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 09:32:45,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:32:45,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:45,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:45,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:45,342 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:45,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:45,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:46,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:46,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [766795933] [2022-11-20 09:32:46,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [766795933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:46,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:46,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:46,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418800616] [2022-11-20 09:32:46,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:46,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:46,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:46,270 INFO L87 Difference]: Start difference. First operand 9704 states and 45322 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:47,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:47,022 INFO L93 Difference]: Finished difference Result 9848 states and 45971 transitions. [2022-11-20 09:32:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:47,064 INFO L225 Difference]: With dead ends: 9848 [2022-11-20 09:32:47,064 INFO L226 Difference]: Without dead ends: 9848 [2022-11-20 09:32:47,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:47,065 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:47,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 32 Unchecked, 0.5s Time] [2022-11-20 09:32:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9848 states. [2022-11-20 09:32:47,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9848 to 9702. [2022-11-20 09:32:47,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9702 states, 9688 states have (on average 4.677332782824112) internal successors, (45314), 9701 states have internal predecessors, (45314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9702 states to 9702 states and 45314 transitions. [2022-11-20 09:32:47,365 INFO L78 Accepts]: Start accepts. Automaton has 9702 states and 45314 transitions. Word has length 13 [2022-11-20 09:32:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:47,365 INFO L495 AbstractCegarLoop]: Abstraction has 9702 states and 45314 transitions. [2022-11-20 09:32:47,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 9702 states and 45314 transitions. [2022-11-20 09:32:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:47,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:47,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:47,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-20 09:32:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:47,569 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1788812472, now seen corresponding path program 7 times [2022-11-20 09:32:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:47,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886154052] [2022-11-20 09:32:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:32:47,570 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 [2022-11-20 09:32:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:47,571 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:47,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-20 09:32:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:47,953 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:47,954 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:48,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:48,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:48,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886154052] [2022-11-20 09:32:48,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886154052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:48,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:48,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:48,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323826317] [2022-11-20 09:32:48,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:48,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:48,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:48,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:48,948 INFO L87 Difference]: Start difference. First operand 9702 states and 45314 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:49,683 INFO L93 Difference]: Finished difference Result 9940 states and 46487 transitions. [2022-11-20 09:32:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:49,717 INFO L225 Difference]: With dead ends: 9940 [2022-11-20 09:32:49,717 INFO L226 Difference]: Without dead ends: 9940 [2022-11-20 09:32:49,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:49,718 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:49,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 109 Unchecked, 0.5s Time] [2022-11-20 09:32:49,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2022-11-20 09:32:49,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 9704. [2022-11-20 09:32:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9704 states, 9690 states have (on average 4.677296181630547) internal successors, (45323), 9703 states have internal predecessors, (45323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9704 states to 9704 states and 45323 transitions. [2022-11-20 09:32:49,934 INFO L78 Accepts]: Start accepts. Automaton has 9704 states and 45323 transitions. Word has length 13 [2022-11-20 09:32:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:49,934 INFO L495 AbstractCegarLoop]: Abstraction has 9704 states and 45323 transitions. [2022-11-20 09:32:49,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 9704 states and 45323 transitions. [2022-11-20 09:32:49,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:49,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:49,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:49,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-20 09:32:50,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:50,137 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:50,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:50,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1788804102, now seen corresponding path program 8 times [2022-11-20 09:32:50,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:50,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480114428] [2022-11-20 09:32:50,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:32:50,138 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 [2022-11-20 09:32:50,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:50,139 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:50,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 09:32:50,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:32:50,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:50,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:50,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:50,569 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:50,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:50,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:51,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:51,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480114428] [2022-11-20 09:32:51,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480114428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:51,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:51,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124423437] [2022-11-20 09:32:51,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:51,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:51,557 INFO L87 Difference]: Start difference. First operand 9704 states and 45323 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:52,262 INFO L93 Difference]: Finished difference Result 10191 states and 47725 transitions. [2022-11-20 09:32:52,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:52,298 INFO L225 Difference]: With dead ends: 10191 [2022-11-20 09:32:52,298 INFO L226 Difference]: Without dead ends: 10191 [2022-11-20 09:32:52,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:52,298 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:52,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-11-20 09:32:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2022-11-20 09:32:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 9773. [2022-11-20 09:32:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9773 states, 9759 states have (on average 4.683471667179014) internal successors, (45706), 9772 states have internal predecessors, (45706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9773 states to 9773 states and 45706 transitions. [2022-11-20 09:32:52,517 INFO L78 Accepts]: Start accepts. Automaton has 9773 states and 45706 transitions. Word has length 13 [2022-11-20 09:32:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:52,517 INFO L495 AbstractCegarLoop]: Abstraction has 9773 states and 45706 transitions. [2022-11-20 09:32:52,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 9773 states and 45706 transitions. [2022-11-20 09:32:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:52,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:52,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:52,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-20 09:32:52,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:52,720 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1618381850, now seen corresponding path program 9 times [2022-11-20 09:32:52,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:52,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359442888] [2022-11-20 09:32:52,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:32:52,721 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 [2022-11-20 09:32:52,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:52,722 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:52,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 09:32:52,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:32:52,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:32:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:53,138 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:53,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:32:54,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:54,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359442888] [2022-11-20 09:32:54,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359442888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:54,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:54,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:32:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741279123] [2022-11-20 09:32:54,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:54,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:54,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:54,083 INFO L87 Difference]: Start difference. First operand 9773 states and 45706 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:55,037 INFO L93 Difference]: Finished difference Result 11268 states and 52697 transitions. [2022-11-20 09:32:55,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:55,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:55,074 INFO L225 Difference]: With dead ends: 11268 [2022-11-20 09:32:55,075 INFO L226 Difference]: Without dead ends: 11268 [2022-11-20 09:32:55,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:32:55,075 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:55,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 25 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 75 Unchecked, 0.7s Time] [2022-11-20 09:32:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11268 states. [2022-11-20 09:32:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11268 to 10261. [2022-11-20 09:32:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10261 states, 10247 states have (on average 4.709671123255587) internal successors, (48260), 10260 states have internal predecessors, (48260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10261 states to 10261 states and 48260 transitions. [2022-11-20 09:32:55,305 INFO L78 Accepts]: Start accepts. Automaton has 10261 states and 48260 transitions. Word has length 13 [2022-11-20 09:32:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:55,306 INFO L495 AbstractCegarLoop]: Abstraction has 10261 states and 48260 transitions. [2022-11-20 09:32:55,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10261 states and 48260 transitions. [2022-11-20 09:32:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:32:55,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:55,308 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:55,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-20 09:32:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:32:55,509 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:32:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 944582873, now seen corresponding path program 5 times [2022-11-20 09:32:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:32:55,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431838765] [2022-11-20 09:32:55,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:32:55,510 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 [2022-11-20 09:32:55,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:32:55,511 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:32:55,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-20 09:32:55,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:32:55,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:55,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 09:32:55,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:55,931 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:32:55,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:32:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:56,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:56,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:32:56,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:32:56,531 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:32:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:57,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:32:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431838765] [2022-11-20 09:32:57,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431838765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:57,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:32:57,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:32:57,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022170678] [2022-11-20 09:32:57,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:57,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 09:32:57,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:32:57,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 09:32:57,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:32:57,937 INFO L87 Difference]: Start difference. First operand 10261 states and 48260 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:59,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:59,703 INFO L93 Difference]: Finished difference Result 10269 states and 48284 transitions. [2022-11-20 09:32:59,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 09:32:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:32:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:59,746 INFO L225 Difference]: With dead ends: 10269 [2022-11-20 09:32:59,746 INFO L226 Difference]: Without dead ends: 10269 [2022-11-20 09:32:59,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:32:59,746 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:59,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 83 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 43 Unchecked, 0.9s Time] [2022-11-20 09:32:59,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10269 states. [2022-11-20 09:32:59,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10269 to 10261. [2022-11-20 09:32:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10261 states, 10247 states have (on average 4.709085586025178) internal successors, (48254), 10260 states have internal predecessors, (48254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:00,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10261 states to 10261 states and 48254 transitions. [2022-11-20 09:33:00,049 INFO L78 Accepts]: Start accepts. Automaton has 10261 states and 48254 transitions. Word has length 13 [2022-11-20 09:33:00,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:00,049 INFO L495 AbstractCegarLoop]: Abstraction has 10261 states and 48254 transitions. [2022-11-20 09:33:00,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:00,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10261 states and 48254 transitions. [2022-11-20 09:33:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:00,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:00,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:00,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:00,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:00,253 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:33:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:00,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1997142148, now seen corresponding path program 1 times [2022-11-20 09:33:00,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:00,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191739703] [2022-11-20 09:33:00,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:00,254 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 [2022-11-20 09:33:00,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:00,255 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:33:00,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 09:33:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:00,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:33:00,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:00,638 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:00,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:00,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:01,562 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:01,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191739703] [2022-11-20 09:33:01,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191739703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:01,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:01,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:33:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974671557] [2022-11-20 09:33:01,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:33:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:33:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:33:01,564 INFO L87 Difference]: Start difference. First operand 10261 states and 48254 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:02,146 INFO L93 Difference]: Finished difference Result 10341 states and 48584 transitions. [2022-11-20 09:33:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:33:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:33:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:02,192 INFO L225 Difference]: With dead ends: 10341 [2022-11-20 09:33:02,192 INFO L226 Difference]: Without dead ends: 10341 [2022-11-20 09:33:02,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:33:02,193 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:02,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 32 Unchecked, 0.4s Time] [2022-11-20 09:33:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2022-11-20 09:33:02,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 10265. [2022-11-20 09:33:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10265 states, 10251 states have (on average 4.7088088966930055) internal successors, (48270), 10264 states have internal predecessors, (48270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 48270 transitions. [2022-11-20 09:33:02,496 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 48270 transitions. Word has length 13 [2022-11-20 09:33:02,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:02,496 INFO L495 AbstractCegarLoop]: Abstraction has 10265 states and 48270 transitions. [2022-11-20 09:33:02,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:02,496 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 48270 transitions. [2022-11-20 09:33:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:02,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:02,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:02,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:02,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:02,700 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:33:02,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1996885468, now seen corresponding path program 2 times [2022-11-20 09:33:02,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:02,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052991172] [2022-11-20 09:33:02,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:02,701 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 [2022-11-20 09:33:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:02,702 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:33:02,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-20 09:33:02,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:02,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:33:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:03,123 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:03,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:03,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:04,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:04,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052991172] [2022-11-20 09:33:04,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052991172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:04,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:04,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:33:04,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752978817] [2022-11-20 09:33:04,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:04,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:33:04,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:04,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:33:04,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:33:04,148 INFO L87 Difference]: Start difference. First operand 10265 states and 48270 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:04,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:04,978 INFO L93 Difference]: Finished difference Result 10551 states and 49506 transitions. [2022-11-20 09:33:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:33:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:33:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:05,024 INFO L225 Difference]: With dead ends: 10551 [2022-11-20 09:33:05,025 INFO L226 Difference]: Without dead ends: 10551 [2022-11-20 09:33:05,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:33:05,025 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:05,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 20 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 57 Unchecked, 0.7s Time] [2022-11-20 09:33:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10551 states. [2022-11-20 09:33:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10551 to 10297. [2022-11-20 09:33:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10283 states have (on average 4.7095205679276475) internal successors, (48428), 10296 states have internal predecessors, (48428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 48428 transitions. [2022-11-20 09:33:05,314 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 48428 transitions. Word has length 13 [2022-11-20 09:33:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:05,314 INFO L495 AbstractCegarLoop]: Abstraction has 10297 states and 48428 transitions. [2022-11-20 09:33:05,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 48428 transitions. [2022-11-20 09:33:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:05,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:05,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:05,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:05,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:05,519 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:33:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:05,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1996738528, now seen corresponding path program 3 times [2022-11-20 09:33:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:05,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908689385] [2022-11-20 09:33:05,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:33:05,519 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 [2022-11-20 09:33:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:05,520 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:33:05,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-20 09:33:05,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:33:05,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:05,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:33:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:05,946 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:05,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:06,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:06,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:06,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908689385] [2022-11-20 09:33:06,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908689385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:06,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:06,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:33:06,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021971973] [2022-11-20 09:33:06,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:06,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:33:06,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:06,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:33:06,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:33:06,923 INFO L87 Difference]: Start difference. First operand 10297 states and 48428 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:07,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:07,554 INFO L93 Difference]: Finished difference Result 10437 states and 49006 transitions. [2022-11-20 09:33:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:33:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:33:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:07,590 INFO L225 Difference]: With dead ends: 10437 [2022-11-20 09:33:07,591 INFO L226 Difference]: Without dead ends: 10437 [2022-11-20 09:33:07,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:33:07,591 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:07,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-11-20 09:33:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2022-11-20 09:33:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 10325. [2022-11-20 09:33:07,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10325 states, 10311 states have (on average 4.707593831830084) internal successors, (48540), 10324 states have internal predecessors, (48540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10325 states to 10325 states and 48540 transitions. [2022-11-20 09:33:07,818 INFO L78 Accepts]: Start accepts. Automaton has 10325 states and 48540 transitions. Word has length 13 [2022-11-20 09:33:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:07,818 INFO L495 AbstractCegarLoop]: Abstraction has 10325 states and 48540 transitions. [2022-11-20 09:33:07,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 10325 states and 48540 transitions. [2022-11-20 09:33:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:07,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:07,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:07,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:08,022 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:33:08,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1866657568, now seen corresponding path program 4 times [2022-11-20 09:33:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:08,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879122008] [2022-11-20 09:33:08,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:33:08,023 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 [2022-11-20 09:33:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:08,024 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:33:08,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 09:33:08,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:33:08,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:08,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:33:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:08,417 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:08,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:08,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:09,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:09,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879122008] [2022-11-20 09:33:09,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879122008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:09,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:09,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:33:09,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436706675] [2022-11-20 09:33:09,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:09,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:33:09,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:09,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:33:09,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:33:09,424 INFO L87 Difference]: Start difference. First operand 10325 states and 48540 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:10,032 INFO L93 Difference]: Finished difference Result 10399 states and 48846 transitions. [2022-11-20 09:33:10,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:33:10,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:33:10,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:10,084 INFO L225 Difference]: With dead ends: 10399 [2022-11-20 09:33:10,084 INFO L226 Difference]: Without dead ends: 10399 [2022-11-20 09:33:10,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:33:10,085 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:10,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-11-20 09:33:10,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10399 states. [2022-11-20 09:33:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10399 to 10331. [2022-11-20 09:33:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10331 states, 10317 states have (on average 4.707376175244741) internal successors, (48566), 10330 states have internal predecessors, (48566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10331 states to 10331 states and 48566 transitions. [2022-11-20 09:33:10,509 INFO L78 Accepts]: Start accepts. Automaton has 10331 states and 48566 transitions. Word has length 13 [2022-11-20 09:33:10,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:10,509 INFO L495 AbstractCegarLoop]: Abstraction has 10331 states and 48566 transitions. [2022-11-20 09:33:10,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10331 states and 48566 transitions. [2022-11-20 09:33:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:10,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:10,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:10,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:10,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:10,726 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:33:10,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:10,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1866673378, now seen corresponding path program 5 times [2022-11-20 09:33:10,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:10,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319785758] [2022-11-20 09:33:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:33:10,728 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 [2022-11-20 09:33:10,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:10,728 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:33:10,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 09:33:10,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:33:10,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:33:10,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:33:10,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:11,133 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:11,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:11,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:12,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:12,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319785758] [2022-11-20 09:33:12,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319785758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:12,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:12,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:33:12,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814102690] [2022-11-20 09:33:12,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:12,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:33:12,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:12,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:33:12,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:33:12,215 INFO L87 Difference]: Start difference. First operand 10331 states and 48566 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:12,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:12,826 INFO L93 Difference]: Finished difference Result 10395 states and 48830 transitions. [2022-11-20 09:33:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:33:12,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:33:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:12,865 INFO L225 Difference]: With dead ends: 10395 [2022-11-20 09:33:12,865 INFO L226 Difference]: Without dead ends: 10395 [2022-11-20 09:33:12,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:33:12,865 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:12,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-20 09:33:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2022-11-20 09:33:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 10333. [2022-11-20 09:33:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10319 states have (on average 4.70743289078399) internal successors, (48576), 10332 states have internal predecessors, (48576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 48576 transitions. [2022-11-20 09:33:13,104 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 48576 transitions. Word has length 13 [2022-11-20 09:33:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:13,104 INFO L495 AbstractCegarLoop]: Abstraction has 10333 states and 48576 transitions. [2022-11-20 09:33:13,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 48576 transitions. [2022-11-20 09:33:13,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:13,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:13,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:13,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:13,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:13,307 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:33:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1866674122, now seen corresponding path program 1 times [2022-11-20 09:33:13,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:13,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857662775] [2022-11-20 09:33:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:13,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:13,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:13,309 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:33:13,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-20 09:33:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:33:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:13,753 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:33:13,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:33:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:14,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:33:14,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:33:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857662775] [2022-11-20 09:33:14,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857662775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:14,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:33:14,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:33:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133622835] [2022-11-20 09:33:14,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:33:14,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:33:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:33:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:33:14,629 INFO L87 Difference]: Start difference. First operand 10333 states and 48576 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:33:15,222 INFO L93 Difference]: Finished difference Result 10405 states and 48930 transitions. [2022-11-20 09:33:15,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:33:15,223 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-20 09:33:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:33:15,262 INFO L225 Difference]: With dead ends: 10405 [2022-11-20 09:33:15,262 INFO L226 Difference]: Without dead ends: 10405 [2022-11-20 09:33:15,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:33:15,262 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:33:15,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-11-20 09:33:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2022-11-20 09:33:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 10333. [2022-11-20 09:33:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10333 states, 10319 states have (on average 4.70743289078399) internal successors, (48576), 10332 states have internal predecessors, (48576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10333 states to 10333 states and 48576 transitions. [2022-11-20 09:33:15,499 INFO L78 Accepts]: Start accepts. Automaton has 10333 states and 48576 transitions. Word has length 13 [2022-11-20 09:33:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:33:15,499 INFO L495 AbstractCegarLoop]: Abstraction has 10333 states and 48576 transitions. [2022-11-20 09:33:15,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 10333 states and 48576 transitions. [2022-11-20 09:33:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 09:33:15,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:33:15,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:15,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:15,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:33:15,702 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:33:15,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:15,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1866680632, now seen corresponding path program 2 times [2022-11-20 09:33:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:33:15,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253750393] [2022-11-20 09:33:15,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:33:15,703 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 [2022-11-20 09:33:15,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:33:15,704 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-20 09:34:01,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-11-20 09:34:01,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:34:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:34:01,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:02,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:34:02,102 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:34:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 09:34:05,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:05,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1799468499] [2022-11-20 09:34:05,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1799468499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:05,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:05,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:34:05,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466452384] [2022-11-20 09:34:05,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:05,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:34:05,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:34:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:34:05,018 INFO L87 Difference]: Start difference. First operand 11458 states and 54400 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 09:34:08,471 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 [] [2022-11-20 09:34:10,818 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 [] [2022-11-20 09:34:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:11,744 INFO L93 Difference]: Finished difference Result 12893 states and 60846 transitions. [2022-11-20 09:34:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:34:11,746 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 14 [2022-11-20 09:34:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:11,800 INFO L225 Difference]: With dead ends: 12893 [2022-11-20 09:34:11,800 INFO L226 Difference]: Without dead ends: 12893 [2022-11-20 09:34:11,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:34:11,801 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 212 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:11,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 26 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 224 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2022-11-20 09:34:11,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12893 states. [2022-11-20 09:34:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12893 to 7354. [2022-11-20 09:34:11,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7354 states, 7346 states have (on average 4.603049278518922) internal successors, (33814), 7353 states have internal predecessors, (33814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7354 states to 7354 states and 33814 transitions. [2022-11-20 09:34:12,016 INFO L78 Accepts]: Start accepts. Automaton has 7354 states and 33814 transitions. Word has length 14 [2022-11-20 09:34:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:12,016 INFO L495 AbstractCegarLoop]: Abstraction has 7354 states and 33814 transitions. [2022-11-20 09:34:12,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-20 09:34:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7354 states and 33814 transitions. [2022-11-20 09:34:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:12,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:12,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:12,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-20 09:34:12,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:12,220 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:34:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:12,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1319458096, now seen corresponding path program 7 times [2022-11-20 09:34:12,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:12,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430910370] [2022-11-20 09:34:12,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:34:12,221 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 [2022-11-20 09:34:12,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:12,221 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:34:12,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-20 09:34:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:12,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:34:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:12,672 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:12,673 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:15,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430910370] [2022-11-20 09:34:15,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430910370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:15,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:15,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:34:15,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984391497] [2022-11-20 09:34:15,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:15,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:34:15,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:34:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:34:15,404 INFO L87 Difference]: Start difference. First operand 7354 states and 33814 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:30,763 INFO L93 Difference]: Finished difference Result 15290 states and 67065 transitions. [2022-11-20 09:34:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-20 09:34:30,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:34:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:30,823 INFO L225 Difference]: With dead ends: 15290 [2022-11-20 09:34:30,823 INFO L226 Difference]: Without dead ends: 15290 [2022-11-20 09:34:30,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=291, Invalid=1515, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 09:34:30,823 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 310 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 824 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:30,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 200 Invalid, 2690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1861 Invalid, 0 Unknown, 824 Unchecked, 10.8s Time] [2022-11-20 09:34:30,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15290 states. [2022-11-20 09:34:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15290 to 9127. [2022-11-20 09:34:31,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9127 states, 9119 states have (on average 4.739006470007676) internal successors, (43215), 9126 states have internal predecessors, (43215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9127 states to 9127 states and 43215 transitions. [2022-11-20 09:34:31,100 INFO L78 Accepts]: Start accepts. Automaton has 9127 states and 43215 transitions. Word has length 14 [2022-11-20 09:34:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:31,101 INFO L495 AbstractCegarLoop]: Abstraction has 9127 states and 43215 transitions. [2022-11-20 09:34:31,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9127 states and 43215 transitions. [2022-11-20 09:34:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:31,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:31,104 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:31,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:31,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:31,305 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:34:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:31,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1306542256, now seen corresponding path program 8 times [2022-11-20 09:34:31,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:31,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117017847] [2022-11-20 09:34:31,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:34:31,305 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 [2022-11-20 09:34:31,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:31,306 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:34:31,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-20 09:34:31,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:34:31,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:31,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:34:31,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:31,769 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:31,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:34,437 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117017847] [2022-11-20 09:34:34,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [117017847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:34,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:34,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-20 09:34:34,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103760518] [2022-11-20 09:34:34,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:34,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 09:34:34,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 09:34:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-20 09:34:34,438 INFO L87 Difference]: Start difference. First operand 9127 states and 43215 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:51,414 INFO L93 Difference]: Finished difference Result 14364 states and 64530 transitions. [2022-11-20 09:34:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 09:34:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 09:34:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:51,471 INFO L225 Difference]: With dead ends: 14364 [2022-11-20 09:34:51,471 INFO L226 Difference]: Without dead ends: 14364 [2022-11-20 09:34:51,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 09:34:51,472 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 325 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1720 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:51,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 209 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1720 Invalid, 0 Unknown, 465 Unchecked, 11.5s Time] [2022-11-20 09:34:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14364 states. [2022-11-20 09:34:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14364 to 9010. [2022-11-20 09:34:51,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9010 states, 9002 states have (on average 4.6985114419017995) internal successors, (42296), 9009 states have internal predecessors, (42296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9010 states to 9010 states and 42296 transitions. [2022-11-20 09:34:51,731 INFO L78 Accepts]: Start accepts. Automaton has 9010 states and 42296 transitions. Word has length 14 [2022-11-20 09:34:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:51,731 INFO L495 AbstractCegarLoop]: Abstraction has 9010 states and 42296 transitions. [2022-11-20 09:34:51,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 9010 states and 42296 transitions. [2022-11-20 09:34:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:51,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:51,735 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:51,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:51,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:51,935 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:34:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:51,936 INFO L85 PathProgramCache]: Analyzing trace with hash 158139995, now seen corresponding path program 4 times [2022-11-20 09:34:51,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:51,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263004804] [2022-11-20 09:34:51,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:34:51,936 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 [2022-11-20 09:34:51,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:51,937 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:34:51,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-20 09:34:52,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:34:52,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:34:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:34:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:52,365 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:34:52,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:34:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:54,574 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:34:54,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263004804] [2022-11-20 09:34:54,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263004804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:54,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:34:54,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:34:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908452023] [2022-11-20 09:34:54,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:54,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:34:54,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:34:54,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:34:54,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:34:54,576 INFO L87 Difference]: Start difference. First operand 9010 states and 42296 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:34:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:34:59,151 INFO L93 Difference]: Finished difference Result 9469 states and 44038 transitions. [2022-11-20 09:34:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 09:34:59,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 [2022-11-20 09:34:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:34:59,183 INFO L225 Difference]: With dead ends: 9469 [2022-11-20 09:34:59,184 INFO L226 Difference]: Without dead ends: 9469 [2022-11-20 09:34:59,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:34:59,184 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 196 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:34:59,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 106 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 485 Invalid, 0 Unknown, 209 Unchecked, 2.9s Time] [2022-11-20 09:34:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9469 states. [2022-11-20 09:34:59,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9469 to 9070. [2022-11-20 09:34:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9070 states, 9062 states have (on average 4.697859192231295) internal successors, (42572), 9069 states have internal predecessors, (42572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9070 states to 9070 states and 42572 transitions. [2022-11-20 09:34:59,395 INFO L78 Accepts]: Start accepts. Automaton has 9070 states and 42572 transitions. Word has length 14 [2022-11-20 09:34:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:34:59,395 INFO L495 AbstractCegarLoop]: Abstraction has 9070 states and 42572 transitions. [2022-11-20 09:34:59,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:34:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 9070 states and 42572 transitions. [2022-11-20 09:34:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:34:59,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:34:59,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:59,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Ended with exit code 0 [2022-11-20 09:34:59,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:59,599 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:34:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:59,600 INFO L85 PathProgramCache]: Analyzing trace with hash 158140274, now seen corresponding path program 5 times [2022-11-20 09:34:59,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:34:59,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901128021] [2022-11-20 09:34:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:34:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:34:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:34:59,601 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:34:59,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-20 09:35:00,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 09:35:00,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:00,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:35:00,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:00,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:00,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:00,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:35:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:00,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:01,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:35:01,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:35:01,099 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:35:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:03,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:03,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901128021] [2022-11-20 09:35:03,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901128021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:03,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:03,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:35:03,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814808165] [2022-11-20 09:35:03,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:03,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:35:03,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:03,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:35:03,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:35:03,003 INFO L87 Difference]: Start difference. First operand 9070 states and 42572 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 09:35:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:12,049 INFO L93 Difference]: Finished difference Result 12916 states and 58829 transitions. [2022-11-20 09:35:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:35:12,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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 [2022-11-20 09:35:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:12,105 INFO L225 Difference]: With dead ends: 12916 [2022-11-20 09:35:12,105 INFO L226 Difference]: Without dead ends: 12916 [2022-11-20 09:35:12,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:35:12,105 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 376 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 799 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:12,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 84 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 487 Invalid, 0 Unknown, 799 Unchecked, 3.7s Time] [2022-11-20 09:35:12,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12916 states. [2022-11-20 09:35:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12916 to 9895. [2022-11-20 09:35:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9895 states, 9887 states have (on average 4.746030140588652) internal successors, (46924), 9894 states have internal predecessors, (46924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9895 states to 9895 states and 46924 transitions. [2022-11-20 09:35:12,361 INFO L78 Accepts]: Start accepts. Automaton has 9895 states and 46924 transitions. Word has length 14 [2022-11-20 09:35:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:12,362 INFO L495 AbstractCegarLoop]: Abstraction has 9895 states and 46924 transitions. [2022-11-20 09:35:12,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 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) [2022-11-20 09:35:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 9895 states and 46924 transitions. [2022-11-20 09:35:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:12,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:12,365 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:12,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Ended with exit code 0 [2022-11-20 09:35:12,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:12,566 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1165251017, now seen corresponding path program 6 times [2022-11-20 09:35:12,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860092909] [2022-11-20 09:35:12,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:35:12,567 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 [2022-11-20 09:35:12,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:12,567 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:12,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-20 09:35:12,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 09:35:12,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:12,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 09:35:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:13,046 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:13,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:13,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:15,340 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:15,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860092909] [2022-11-20 09:35:15,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860092909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:15,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:15,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:35:15,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47001721] [2022-11-20 09:35:15,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:15,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:35:15,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:35:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:35:15,342 INFO L87 Difference]: Start difference. First operand 9895 states and 46924 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:35:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:29,833 INFO L93 Difference]: Finished difference Result 19481 states and 89387 transitions. [2022-11-20 09:35:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 09:35:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 [2022-11-20 09:35:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:29,909 INFO L225 Difference]: With dead ends: 19481 [2022-11-20 09:35:29,910 INFO L226 Difference]: Without dead ends: 19481 [2022-11-20 09:35:29,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 09:35:29,910 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 634 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1518 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:29,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 142 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 805 Invalid, 0 Unknown, 1518 Unchecked, 6.6s Time] [2022-11-20 09:35:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19481 states. [2022-11-20 09:35:30,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19481 to 12514. [2022-11-20 09:35:30,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12514 states, 12506 states have (on average 4.808811770350232) internal successors, (60139), 12513 states have internal predecessors, (60139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12514 states to 12514 states and 60139 transitions. [2022-11-20 09:35:30,265 INFO L78 Accepts]: Start accepts. Automaton has 12514 states and 60139 transitions. Word has length 14 [2022-11-20 09:35:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:30,265 INFO L495 AbstractCegarLoop]: Abstraction has 12514 states and 60139 transitions. [2022-11-20 09:35:30,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:35:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 12514 states and 60139 transitions. [2022-11-20 09:35:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:30,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:30,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:30,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:30,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:30,470 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1443507782, now seen corresponding path program 1 times [2022-11-20 09:35:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:30,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24507009] [2022-11-20 09:35:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:30,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:30,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:30,471 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:30,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-20 09:35:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:30,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:30,873 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:30,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:31,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:31,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:31,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24507009] [2022-11-20 09:35:31,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24507009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:31,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:31,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219697773] [2022-11-20 09:35:31,897 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:31,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:31,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:31,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:31,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:31,898 INFO L87 Difference]: Start difference. First operand 12514 states and 60139 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:32,759 INFO L93 Difference]: Finished difference Result 13673 states and 65659 transitions. [2022-11-20 09:35:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:32,807 INFO L225 Difference]: With dead ends: 13673 [2022-11-20 09:35:32,807 INFO L226 Difference]: Without dead ends: 13673 [2022-11-20 09:35:32,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:32,807 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:32,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 33 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 73 Unchecked, 0.7s Time] [2022-11-20 09:35:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13673 states. [2022-11-20 09:35:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13673 to 12514. [2022-11-20 09:35:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12514 states, 12506 states have (on average 4.808811770350232) internal successors, (60139), 12513 states have internal predecessors, (60139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12514 states to 12514 states and 60139 transitions. [2022-11-20 09:35:33,217 INFO L78 Accepts]: Start accepts. Automaton has 12514 states and 60139 transitions. Word has length 14 [2022-11-20 09:35:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:33,217 INFO L495 AbstractCegarLoop]: Abstraction has 12514 states and 60139 transitions. [2022-11-20 09:35:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 12514 states and 60139 transitions. [2022-11-20 09:35:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:33,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:33,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:33,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:33,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:33,422 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:33,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1443637052, now seen corresponding path program 2 times [2022-11-20 09:35:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:33,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895573063] [2022-11-20 09:35:33,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:33,423 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 [2022-11-20 09:35:33,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:33,424 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:33,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-20 09:35:33,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:33,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:33,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:33,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:34,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:34,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:34,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895573063] [2022-11-20 09:35:34,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895573063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:34,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:34,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:34,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491746921] [2022-11-20 09:35:34,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:34,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:34,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:34,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:34,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:34,827 INFO L87 Difference]: Start difference. First operand 12514 states and 60139 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:35,460 INFO L93 Difference]: Finished difference Result 14088 states and 67405 transitions. [2022-11-20 09:35:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:35,512 INFO L225 Difference]: With dead ends: 14088 [2022-11-20 09:35:35,512 INFO L226 Difference]: Without dead ends: 14088 [2022-11-20 09:35:35,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:35,512 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:35,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-11-20 09:35:35,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14088 states. [2022-11-20 09:35:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14088 to 12606. [2022-11-20 09:35:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12606 states, 12598 states have (on average 4.803143356088268) internal successors, (60510), 12605 states have internal predecessors, (60510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12606 states to 12606 states and 60510 transitions. [2022-11-20 09:35:35,810 INFO L78 Accepts]: Start accepts. Automaton has 12606 states and 60510 transitions. Word has length 14 [2022-11-20 09:35:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:35,810 INFO L495 AbstractCegarLoop]: Abstraction has 12606 states and 60510 transitions. [2022-11-20 09:35:35,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 12606 states and 60510 transitions. [2022-11-20 09:35:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:35,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:35,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:35,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-20 09:35:36,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:36,014 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:36,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1442540992, now seen corresponding path program 1 times [2022-11-20 09:35:36,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:36,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916473905] [2022-11-20 09:35:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:36,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:36,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:36,015 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:36,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-20 09:35:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:36,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:35:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:36,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:35:36,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916473905] [2022-11-20 09:35:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916473905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:35:36,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:35:36,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:35:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432982381] [2022-11-20 09:35:36,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:36,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:35:36,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:35:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:35:36,347 INFO L87 Difference]: Start difference. First operand 12606 states and 60510 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-20 09:35:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:36,569 INFO L93 Difference]: Finished difference Result 12427 states and 59790 transitions. [2022-11-20 09:35:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:35:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2022-11-20 09:35:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:36,618 INFO L225 Difference]: With dead ends: 12427 [2022-11-20 09:35:36,618 INFO L226 Difference]: Without dead ends: 12427 [2022-11-20 09:35:36,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:35:36,619 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:36,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:35:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12427 states. [2022-11-20 09:35:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12427 to 12427. [2022-11-20 09:35:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12427 states, 12422 states have (on average 4.81323458380293) internal successors, (59790), 12426 states have internal predecessors, (59790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12427 states to 12427 states and 59790 transitions. [2022-11-20 09:35:36,926 INFO L78 Accepts]: Start accepts. Automaton has 12427 states and 59790 transitions. Word has length 14 [2022-11-20 09:35:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:36,926 INFO L495 AbstractCegarLoop]: Abstraction has 12427 states and 59790 transitions. [2022-11-20 09:35:36,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-20 09:35:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 12427 states and 59790 transitions. [2022-11-20 09:35:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:36,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:36,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:36,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:37,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:37,131 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:37,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1442685662, now seen corresponding path program 3 times [2022-11-20 09:35:37,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:37,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840627156] [2022-11-20 09:35:37,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:35:37,132 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 [2022-11-20 09:35:37,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:37,133 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:37,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-20 09:35:37,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:35:37,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:37,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:37,575 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:37,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:37,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:38,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:38,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840627156] [2022-11-20 09:35:38,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840627156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:38,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:38,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:38,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715768883] [2022-11-20 09:35:38,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:38,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:38,505 INFO L87 Difference]: Start difference. First operand 12427 states and 59790 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:39,048 INFO L93 Difference]: Finished difference Result 12811 states and 61718 transitions. [2022-11-20 09:35:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:35:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:39,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:39,099 INFO L225 Difference]: With dead ends: 12811 [2022-11-20 09:35:39,099 INFO L226 Difference]: Without dead ends: 12811 [2022-11-20 09:35:39,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:39,099 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:39,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2022-11-20 09:35:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12811 states. [2022-11-20 09:35:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12811 to 12427. [2022-11-20 09:35:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12427 states, 12422 states have (on average 4.81323458380293) internal successors, (59790), 12426 states have internal predecessors, (59790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12427 states to 12427 states and 59790 transitions. [2022-11-20 09:35:39,411 INFO L78 Accepts]: Start accepts. Automaton has 12427 states and 59790 transitions. Word has length 14 [2022-11-20 09:35:39,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:39,411 INFO L495 AbstractCegarLoop]: Abstraction has 12427 states and 59790 transitions. [2022-11-20 09:35:39,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:39,411 INFO L276 IsEmpty]: Start isEmpty. Operand 12427 states and 59790 transitions. [2022-11-20 09:35:39,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:39,414 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:39,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:39,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-20 09:35:39,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:39,615 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:39,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1609741562, now seen corresponding path program 4 times [2022-11-20 09:35:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:39,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178211359] [2022-11-20 09:35:39,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:35:39,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:39,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:39,617 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:39,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-20 09:35:39,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:35:39,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:40,041 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:40,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:40,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:41,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:35:41,001 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:41,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178211359] [2022-11-20 09:35:41,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178211359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:41,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:41,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:41,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079363106] [2022-11-20 09:35:41,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:41,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:41,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:41,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:41,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:41,003 INFO L87 Difference]: Start difference. First operand 12427 states and 59790 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:41,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:41,807 INFO L93 Difference]: Finished difference Result 13299 states and 63756 transitions. [2022-11-20 09:35:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:41,966 INFO L225 Difference]: With dead ends: 13299 [2022-11-20 09:35:41,967 INFO L226 Difference]: Without dead ends: 13299 [2022-11-20 09:35:41,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:41,967 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:41,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 95 Unchecked, 0.7s Time] [2022-11-20 09:35:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13299 states. [2022-11-20 09:35:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13299 to 12426. [2022-11-20 09:35:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12426 states, 12421 states have (on average 4.813380565171887) internal successors, (59787), 12425 states have internal predecessors, (59787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12426 states to 12426 states and 59787 transitions. [2022-11-20 09:35:42,254 INFO L78 Accepts]: Start accepts. Automaton has 12426 states and 59787 transitions. Word has length 14 [2022-11-20 09:35:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:42,254 INFO L495 AbstractCegarLoop]: Abstraction has 12426 states and 59787 transitions. [2022-11-20 09:35:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 12426 states and 59787 transitions. [2022-11-20 09:35:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:42,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:42,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:42,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:42,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:42,458 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1609870832, now seen corresponding path program 5 times [2022-11-20 09:35:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:42,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743653364] [2022-11-20 09:35:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:35:42,460 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 [2022-11-20 09:35:42,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:42,460 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:42,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-20 09:35:42,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:35:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:42,900 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:42,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:43,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:44,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:44,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743653364] [2022-11-20 09:35:44,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743653364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:44,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:44,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:35:44,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640782983] [2022-11-20 09:35:44,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:35:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:35:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:35:44,083 INFO L87 Difference]: Start difference. First operand 12426 states and 59787 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:35:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:44,686 INFO L93 Difference]: Finished difference Result 12774 states and 61530 transitions. [2022-11-20 09:35:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:35:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:44,739 INFO L225 Difference]: With dead ends: 12774 [2022-11-20 09:35:44,739 INFO L226 Difference]: Without dead ends: 12774 [2022-11-20 09:35:44,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:35:44,740 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:44,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 56 Unchecked, 0.5s Time] [2022-11-20 09:35:44,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12774 states. [2022-11-20 09:35:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12774 to 12430. [2022-11-20 09:35:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12430 states, 12425 states have (on average 4.813038229376257) internal successors, (59802), 12429 states have internal predecessors, (59802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12430 states to 12430 states and 59802 transitions. [2022-11-20 09:35:45,032 INFO L78 Accepts]: Start accepts. Automaton has 12430 states and 59802 transitions. Word has length 14 [2022-11-20 09:35:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:45,032 INFO L495 AbstractCegarLoop]: Abstraction has 12430 states and 59802 transitions. [2022-11-20 09:35:45,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:35:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12430 states and 59802 transitions. [2022-11-20 09:35:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:45,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:45,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:45,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-20 09:35:45,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:45,236 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash 736879806, now seen corresponding path program 6 times [2022-11-20 09:35:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:45,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587510384] [2022-11-20 09:35:45,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:35:45,236 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 [2022-11-20 09:35:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:45,237 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:45,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-20 09:35:45,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:35:45,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:45,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:45,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:45,673 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:46,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:46,609 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:46,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587510384] [2022-11-20 09:35:46,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587510384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:46,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:46,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:46,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041116681] [2022-11-20 09:35:46,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:46,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:46,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:46,612 INFO L87 Difference]: Start difference. First operand 12430 states and 59802 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:47,368 INFO L93 Difference]: Finished difference Result 14047 states and 67838 transitions. [2022-11-20 09:35:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:35:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:47,428 INFO L225 Difference]: With dead ends: 14047 [2022-11-20 09:35:47,428 INFO L226 Difference]: Without dead ends: 14047 [2022-11-20 09:35:47,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:47,428 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:47,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 23 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 86 Unchecked, 0.6s Time] [2022-11-20 09:35:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14047 states. [2022-11-20 09:35:47,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14047 to 12516. [2022-11-20 09:35:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12511 states have (on average 4.825113899768204) internal successors, (60367), 12515 states have internal predecessors, (60367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 60367 transitions. [2022-11-20 09:35:47,741 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 60367 transitions. Word has length 14 [2022-11-20 09:35:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:47,742 INFO L495 AbstractCegarLoop]: Abstraction has 12516 states and 60367 transitions. [2022-11-20 09:35:47,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 60367 transitions. [2022-11-20 09:35:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:47,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:47,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:47,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-20 09:35:47,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:47,946 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:47,946 INFO L85 PathProgramCache]: Analyzing trace with hash 732872436, now seen corresponding path program 7 times [2022-11-20 09:35:47,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:47,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1049929941] [2022-11-20 09:35:47,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:35:47,947 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:47,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:47,947 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:47,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-20 09:35:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:48,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:48,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:48,389 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:48,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:48,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:49,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1049929941] [2022-11-20 09:35:49,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1049929941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:49,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:49,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:49,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179594898] [2022-11-20 09:35:49,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:49,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:49,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:49,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:49,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:49,344 INFO L87 Difference]: Start difference. First operand 12516 states and 60367 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:49,569 INFO L93 Difference]: Finished difference Result 12780 states and 61690 transitions. [2022-11-20 09:35:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:49,619 INFO L225 Difference]: With dead ends: 12780 [2022-11-20 09:35:49,619 INFO L226 Difference]: Without dead ends: 12780 [2022-11-20 09:35:49,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:49,620 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:49,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-20 09:35:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12780 states. [2022-11-20 09:35:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12780 to 12518. [2022-11-20 09:35:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12518 states, 12513 states have (on average 4.825141852473427) internal successors, (60377), 12517 states have internal predecessors, (60377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12518 states to 12518 states and 60377 transitions. [2022-11-20 09:35:50,089 INFO L78 Accepts]: Start accepts. Automaton has 12518 states and 60377 transitions. Word has length 14 [2022-11-20 09:35:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:50,090 INFO L495 AbstractCegarLoop]: Abstraction has 12518 states and 60377 transitions. [2022-11-20 09:35:50,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 12518 states and 60377 transitions. [2022-11-20 09:35:50,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:50,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:50,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:50,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:50,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:50,294 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:50,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:50,295 INFO L85 PathProgramCache]: Analyzing trace with hash 732863136, now seen corresponding path program 8 times [2022-11-20 09:35:50,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:50,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698583685] [2022-11-20 09:35:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:35:50,295 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 [2022-11-20 09:35:50,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:50,296 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:50,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-20 09:35:50,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:35:50,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:50,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:50,740 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:50,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:51,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:51,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:51,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698583685] [2022-11-20 09:35:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698583685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:51,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:51,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:51,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87341990] [2022-11-20 09:35:51,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:51,657 INFO L87 Difference]: Start difference. First operand 12518 states and 60377 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:52,170 INFO L93 Difference]: Finished difference Result 12866 states and 62070 transitions. [2022-11-20 09:35:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:52,223 INFO L225 Difference]: With dead ends: 12866 [2022-11-20 09:35:52,223 INFO L226 Difference]: Without dead ends: 12866 [2022-11-20 09:35:52,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:52,223 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:52,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-20 09:35:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12866 states. [2022-11-20 09:35:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12866 to 12520. [2022-11-20 09:35:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12520 states, 12515 states have (on average 4.824850179784259) internal successors, (60383), 12519 states have internal predecessors, (60383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12520 states to 12520 states and 60383 transitions. [2022-11-20 09:35:52,561 INFO L78 Accepts]: Start accepts. Automaton has 12520 states and 60383 transitions. Word has length 14 [2022-11-20 09:35:52,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:52,561 INFO L495 AbstractCegarLoop]: Abstraction has 12520 states and 60383 transitions. [2022-11-20 09:35:52,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:52,561 INFO L276 IsEmpty]: Start isEmpty. Operand 12520 states and 60383 transitions. [2022-11-20 09:35:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:52,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:52,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:52,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Ended with exit code 0 [2022-11-20 09:35:52,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:52,766 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:52,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash 736711476, now seen corresponding path program 9 times [2022-11-20 09:35:52,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:52,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890433031] [2022-11-20 09:35:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:35:52,767 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 [2022-11-20 09:35:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:52,770 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:52,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-20 09:35:53,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:35:53,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:35:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:53,211 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:53,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:53,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:54,167 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:54,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890433031] [2022-11-20 09:35:54,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890433031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:54,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:54,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:54,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775710015] [2022-11-20 09:35:54,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:54,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:54,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:54,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:54,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:54,169 INFO L87 Difference]: Start difference. First operand 12520 states and 60383 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:55,001 INFO L93 Difference]: Finished difference Result 13836 states and 66627 transitions. [2022-11-20 09:35:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:55,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:55,055 INFO L225 Difference]: With dead ends: 13836 [2022-11-20 09:35:55,055 INFO L226 Difference]: Without dead ends: 13836 [2022-11-20 09:35:55,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:55,055 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:55,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 19 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 65 Unchecked, 0.7s Time] [2022-11-20 09:35:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13836 states. [2022-11-20 09:35:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13836 to 12520. [2022-11-20 09:35:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12520 states, 12515 states have (on average 4.824850179784259) internal successors, (60383), 12519 states have internal predecessors, (60383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:55,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12520 states to 12520 states and 60383 transitions. [2022-11-20 09:35:55,365 INFO L78 Accepts]: Start accepts. Automaton has 12520 states and 60383 transitions. Word has length 14 [2022-11-20 09:35:55,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:55,366 INFO L495 AbstractCegarLoop]: Abstraction has 12520 states and 60383 transitions. [2022-11-20 09:35:55,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:55,366 INFO L276 IsEmpty]: Start isEmpty. Operand 12520 states and 60383 transitions. [2022-11-20 09:35:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:55,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:55,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:55,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Ended with exit code 0 [2022-11-20 09:35:55,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:55,570 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:55,570 INFO L85 PathProgramCache]: Analyzing trace with hash 766818149, now seen corresponding path program 1 times [2022-11-20 09:35:55,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:55,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275863239] [2022-11-20 09:35:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:55,571 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 [2022-11-20 09:35:55,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:55,571 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:55,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-20 09:35:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:55,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:56,002 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:56,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:56,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:56,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275863239] [2022-11-20 09:35:56,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275863239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:56,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:56,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:56,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191505060] [2022-11-20 09:35:56,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:56,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:56,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:56,931 INFO L87 Difference]: Start difference. First operand 12520 states and 60383 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:57,190 INFO L93 Difference]: Finished difference Result 12985 states and 62670 transitions. [2022-11-20 09:35:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:35:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:57,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:57,241 INFO L225 Difference]: With dead ends: 12985 [2022-11-20 09:35:57,241 INFO L226 Difference]: Without dead ends: 12985 [2022-11-20 09:35:57,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:57,241 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:57,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-20 09:35:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12985 states. [2022-11-20 09:35:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12985 to 12522. [2022-11-20 09:35:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12522 states, 12517 states have (on average 4.824718382999121) internal successors, (60391), 12521 states have internal predecessors, (60391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 60391 transitions. [2022-11-20 09:35:57,552 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 60391 transitions. Word has length 14 [2022-11-20 09:35:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:35:57,552 INFO L495 AbstractCegarLoop]: Abstraction has 12522 states and 60391 transitions. [2022-11-20 09:35:57,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 60391 transitions. [2022-11-20 09:35:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:35:57,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:35:57,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:57,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-20 09:35:57,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:35:57,756 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:35:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:57,757 INFO L85 PathProgramCache]: Analyzing trace with hash 762617618, now seen corresponding path program 1 times [2022-11-20 09:35:57,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:35:57,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073407111] [2022-11-20 09:35:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:57,757 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 [2022-11-20 09:35:57,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:35:57,758 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:35:57,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-20 09:35:58,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:58,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:35:58,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:58,201 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:35:58,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:35:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:58,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:35:59,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:35:59,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073407111] [2022-11-20 09:35:59,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073407111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:59,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:59,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:35:59,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464379058] [2022-11-20 09:35:59,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:59,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:35:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:59,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:59,187 INFO L87 Difference]: Start difference. First operand 12522 states and 60391 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:35:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:35:59,756 INFO L93 Difference]: Finished difference Result 12980 states and 62837 transitions. [2022-11-20 09:35:59,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:35:59,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:35:59,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:35:59,809 INFO L225 Difference]: With dead ends: 12980 [2022-11-20 09:35:59,809 INFO L226 Difference]: Without dead ends: 12980 [2022-11-20 09:35:59,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:35:59,809 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:35:59,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-11-20 09:35:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12980 states. [2022-11-20 09:36:00,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12980 to 12523. [2022-11-20 09:36:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12523 states, 12518 states have (on average 4.824732385365074) internal successors, (60396), 12522 states have internal predecessors, (60396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:00,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12523 states to 12523 states and 60396 transitions. [2022-11-20 09:36:00,118 INFO L78 Accepts]: Start accepts. Automaton has 12523 states and 60396 transitions. Word has length 14 [2022-11-20 09:36:00,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:00,118 INFO L495 AbstractCegarLoop]: Abstraction has 12523 states and 60396 transitions. [2022-11-20 09:36:00,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:00,118 INFO L276 IsEmpty]: Start isEmpty. Operand 12523 states and 60396 transitions. [2022-11-20 09:36:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:00,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:00,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:00,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:00,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:00,322 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash 762349499, now seen corresponding path program 2 times [2022-11-20 09:36:00,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:00,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770110505] [2022-11-20 09:36:00,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:36:00,323 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 [2022-11-20 09:36:00,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:00,324 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:00,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-20 09:36:00,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:00,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:00,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:00,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:00,801 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:00,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:01,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:01,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770110505] [2022-11-20 09:36:01,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770110505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:01,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:01,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:01,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732546647] [2022-11-20 09:36:01,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:01,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:01,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:01,781 INFO L87 Difference]: Start difference. First operand 12523 states and 60396 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:02,293 INFO L93 Difference]: Finished difference Result 13077 states and 63126 transitions. [2022-11-20 09:36:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:02,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:02,339 INFO L225 Difference]: With dead ends: 13077 [2022-11-20 09:36:02,339 INFO L226 Difference]: Without dead ends: 13077 [2022-11-20 09:36:02,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:02,340 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:02,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-20 09:36:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13077 states. [2022-11-20 09:36:02,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13077 to 12594. [2022-11-20 09:36:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12594 states, 12589 states have (on average 4.824847088728255) internal successors, (60740), 12593 states have internal predecessors, (60740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12594 states to 12594 states and 60740 transitions. [2022-11-20 09:36:02,653 INFO L78 Accepts]: Start accepts. Automaton has 12594 states and 60740 transitions. Word has length 14 [2022-11-20 09:36:02,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:02,653 INFO L495 AbstractCegarLoop]: Abstraction has 12594 states and 60740 transitions. [2022-11-20 09:36:02,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 12594 states and 60740 transitions. [2022-11-20 09:36:02,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:02,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:02,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:02,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:02,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:02,858 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:02,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:02,858 INFO L85 PathProgramCache]: Analyzing trace with hash 762365309, now seen corresponding path program 3 times [2022-11-20 09:36:02,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:02,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317302164] [2022-11-20 09:36:02,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:36:02,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:02,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:02,860 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:02,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-20 09:36:03,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:36:03,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:03,325 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:03,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:03,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:04,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317302164] [2022-11-20 09:36:04,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317302164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:04,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:04,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:04,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036715512] [2022-11-20 09:36:04,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:04,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:04,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:04,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:04,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:04,235 INFO L87 Difference]: Start difference. First operand 12594 states and 60740 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:04,754 INFO L93 Difference]: Finished difference Result 13077 states and 63145 transitions. [2022-11-20 09:36:04,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:36:04,756 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:04,801 INFO L225 Difference]: With dead ends: 13077 [2022-11-20 09:36:04,801 INFO L226 Difference]: Without dead ends: 13077 [2022-11-20 09:36:04,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:04,802 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:04,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 23 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-11-20 09:36:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13077 states. [2022-11-20 09:36:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13077 to 12630. [2022-11-20 09:36:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12630 states, 12625 states have (on average 4.827405940594059) internal successors, (60946), 12629 states have internal predecessors, (60946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:05,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12630 states to 12630 states and 60946 transitions. [2022-11-20 09:36:05,086 INFO L78 Accepts]: Start accepts. Automaton has 12630 states and 60946 transitions. Word has length 14 [2022-11-20 09:36:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:05,086 INFO L495 AbstractCegarLoop]: Abstraction has 12630 states and 60946 transitions. [2022-11-20 09:36:05,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:05,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12630 states and 60946 transitions. [2022-11-20 09:36:05,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:05,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:05,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:05,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:05,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:05,290 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash 762360938, now seen corresponding path program 2 times [2022-11-20 09:36:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:05,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331029243] [2022-11-20 09:36:05,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:36:05,291 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 [2022-11-20 09:36:05,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:05,292 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:05,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-20 09:36:05,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:05,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:05,761 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:05,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:06,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:06,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:06,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331029243] [2022-11-20 09:36:06,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331029243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:06,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:06,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:06,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118931646] [2022-11-20 09:36:06,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:06,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:06,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:06,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:06,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:06,678 INFO L87 Difference]: Start difference. First operand 12630 states and 60946 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:07,230 INFO L93 Difference]: Finished difference Result 13420 states and 65206 transitions. [2022-11-20 09:36:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:36:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:07,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:07,278 INFO L225 Difference]: With dead ends: 13420 [2022-11-20 09:36:07,278 INFO L226 Difference]: Without dead ends: 13420 [2022-11-20 09:36:07,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:07,278 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:07,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 21 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2022-11-20 09:36:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13420 states. [2022-11-20 09:36:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13420 to 12810. [2022-11-20 09:36:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12810 states, 12805 states have (on average 4.8431081608746585) internal successors, (62016), 12809 states have internal predecessors, (62016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:07,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12810 states to 12810 states and 62016 transitions. [2022-11-20 09:36:07,680 INFO L78 Accepts]: Start accepts. Automaton has 12810 states and 62016 transitions. Word has length 14 [2022-11-20 09:36:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:07,680 INFO L495 AbstractCegarLoop]: Abstraction has 12810 states and 62016 transitions. [2022-11-20 09:36:07,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:07,681 INFO L276 IsEmpty]: Start isEmpty. Operand 12810 states and 62016 transitions. [2022-11-20 09:36:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:07,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:07,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:07,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:07,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:07,884 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash 762365526, now seen corresponding path program 10 times [2022-11-20 09:36:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:07,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959236048] [2022-11-20 09:36:07,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:07,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:07,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:07,887 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:07,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-20 09:36:08,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:08,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:08,317 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:08,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:08,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:09,226 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:09,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959236048] [2022-11-20 09:36:09,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959236048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:09,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:09,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69282049] [2022-11-20 09:36:09,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:09,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:09,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:09,227 INFO L87 Difference]: Start difference. First operand 12810 states and 62016 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:09,453 INFO L93 Difference]: Finished difference Result 13088 states and 63426 transitions. [2022-11-20 09:36:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:09,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:09,505 INFO L225 Difference]: With dead ends: 13088 [2022-11-20 09:36:09,505 INFO L226 Difference]: Without dead ends: 13088 [2022-11-20 09:36:09,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:09,506 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:09,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 09:36:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2022-11-20 09:36:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 12810. [2022-11-20 09:36:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12810 states, 12805 states have (on average 4.8431081608746585) internal successors, (62016), 12809 states have internal predecessors, (62016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12810 states to 12810 states and 62016 transitions. [2022-11-20 09:36:09,816 INFO L78 Accepts]: Start accepts. Automaton has 12810 states and 62016 transitions. Word has length 14 [2022-11-20 09:36:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:09,816 INFO L495 AbstractCegarLoop]: Abstraction has 12810 states and 62016 transitions. [2022-11-20 09:36:09,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12810 states and 62016 transitions. [2022-11-20 09:36:09,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:09,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:09,820 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:09,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:10,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:10,020 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash 762213998, now seen corresponding path program 3 times [2022-11-20 09:36:10,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:10,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208864453] [2022-11-20 09:36:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:36:10,021 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 [2022-11-20 09:36:10,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:10,022 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:10,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-20 09:36:10,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:36:10,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:10,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:10,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:10,499 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:10,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:10,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:11,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:11,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208864453] [2022-11-20 09:36:11,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208864453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:11,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:11,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:11,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459899479] [2022-11-20 09:36:11,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:11,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:11,425 INFO L87 Difference]: Start difference. First operand 12810 states and 62016 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:12,034 INFO L93 Difference]: Finished difference Result 13850 states and 67653 transitions. [2022-11-20 09:36:12,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:12,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:12,085 INFO L225 Difference]: With dead ends: 13850 [2022-11-20 09:36:12,085 INFO L226 Difference]: Without dead ends: 13850 [2022-11-20 09:36:12,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:12,086 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:12,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 26 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-11-20 09:36:12,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13850 states. [2022-11-20 09:36:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13850 to 12920. [2022-11-20 09:36:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12920 states, 12915 states have (on average 4.850871080139373) internal successors, (62649), 12919 states have internal predecessors, (62649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:12,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12920 states to 12920 states and 62649 transitions. [2022-11-20 09:36:12,400 INFO L78 Accepts]: Start accepts. Automaton has 12920 states and 62649 transitions. Word has length 14 [2022-11-20 09:36:12,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:12,400 INFO L495 AbstractCegarLoop]: Abstraction has 12920 states and 62649 transitions. [2022-11-20 09:36:12,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 12920 states and 62649 transitions. [2022-11-20 09:36:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:12,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:12,404 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:12,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-20 09:36:12,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:12,604 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:12,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:12,605 INFO L85 PathProgramCache]: Analyzing trace with hash 762356226, now seen corresponding path program 11 times [2022-11-20 09:36:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:12,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121631693] [2022-11-20 09:36:12,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:36:12,605 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 [2022-11-20 09:36:12,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:12,606 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:12,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-20 09:36:12,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:12,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:12,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:36:12,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:13,143 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:13,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:13,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:14,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:14,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121631693] [2022-11-20 09:36:14,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121631693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:14,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:14,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:36:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813510987] [2022-11-20 09:36:14,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:14,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:36:14,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:14,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:36:14,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:36:14,355 INFO L87 Difference]: Start difference. First operand 12920 states and 62649 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:36:14,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:14,892 INFO L93 Difference]: Finished difference Result 13205 states and 64082 transitions. [2022-11-20 09:36:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:36:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:14,942 INFO L225 Difference]: With dead ends: 13205 [2022-11-20 09:36:14,942 INFO L226 Difference]: Without dead ends: 13205 [2022-11-20 09:36:14,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:36:14,943 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:14,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-20 09:36:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13205 states. [2022-11-20 09:36:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13205 to 12920. [2022-11-20 09:36:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12920 states, 12915 states have (on average 4.850871080139373) internal successors, (62649), 12919 states have internal predecessors, (62649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12920 states to 12920 states and 62649 transitions. [2022-11-20 09:36:15,259 INFO L78 Accepts]: Start accepts. Automaton has 12920 states and 62649 transitions. Word has length 14 [2022-11-20 09:36:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:15,259 INFO L495 AbstractCegarLoop]: Abstraction has 12920 states and 62649 transitions. [2022-11-20 09:36:15,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:36:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 12920 states and 62649 transitions. [2022-11-20 09:36:15,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:15,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:15,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:15,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:15,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:15,463 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -121400078, now seen corresponding path program 12 times [2022-11-20 09:36:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:15,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457809648] [2022-11-20 09:36:15,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:36:15,464 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 [2022-11-20 09:36:15,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:15,466 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:15,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-20 09:36:15,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:36:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:15,918 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:15,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:16,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:16,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:16,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457809648] [2022-11-20 09:36:16,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457809648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:16,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:16,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078292618] [2022-11-20 09:36:16,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:16,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:16,916 INFO L87 Difference]: Start difference. First operand 12920 states and 62649 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:17,649 INFO L93 Difference]: Finished difference Result 14386 states and 69681 transitions. [2022-11-20 09:36:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:17,704 INFO L225 Difference]: With dead ends: 14386 [2022-11-20 09:36:17,704 INFO L226 Difference]: Without dead ends: 14386 [2022-11-20 09:36:17,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:17,704 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 23 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:17,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 98 Unchecked, 0.6s Time] [2022-11-20 09:36:17,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14386 states. [2022-11-20 09:36:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14386 to 12721. [2022-11-20 09:36:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12716 states have (on average 4.842245989304812) internal successors, (61574), 12720 states have internal predecessors, (61574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:18,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 61574 transitions. [2022-11-20 09:36:18,011 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 61574 transitions. Word has length 14 [2022-11-20 09:36:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:18,012 INFO L495 AbstractCegarLoop]: Abstraction has 12721 states and 61574 transitions. [2022-11-20 09:36:18,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:18,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 61574 transitions. [2022-11-20 09:36:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:18,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:18,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:18,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Ended with exit code 0 [2022-11-20 09:36:18,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:18,216 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash -125407665, now seen corresponding path program 4 times [2022-11-20 09:36:18,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:18,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822166850] [2022-11-20 09:36:18,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:18,216 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 [2022-11-20 09:36:18,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:18,217 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:18,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-20 09:36:18,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:18,648 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:18,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:18,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:19,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:19,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822166850] [2022-11-20 09:36:19,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822166850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:19,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:19,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:19,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162931151] [2022-11-20 09:36:19,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:19,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:19,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:19,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:19,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:19,532 INFO L87 Difference]: Start difference. First operand 12721 states and 61574 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:20,106 INFO L93 Difference]: Finished difference Result 14235 states and 69307 transitions. [2022-11-20 09:36:20,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:36:20,108 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:20,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:20,156 INFO L225 Difference]: With dead ends: 14235 [2022-11-20 09:36:20,156 INFO L226 Difference]: Without dead ends: 14235 [2022-11-20 09:36:20,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:20,156 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:20,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 24 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 115 Unchecked, 0.4s Time] [2022-11-20 09:36:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14235 states. [2022-11-20 09:36:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14235 to 12721. [2022-11-20 09:36:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12716 states have (on average 4.842245989304812) internal successors, (61574), 12720 states have internal predecessors, (61574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:20,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 61574 transitions. [2022-11-20 09:36:20,459 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 61574 transitions. Word has length 14 [2022-11-20 09:36:20,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:20,459 INFO L495 AbstractCegarLoop]: Abstraction has 12721 states and 61574 transitions. [2022-11-20 09:36:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 61574 transitions. [2022-11-20 09:36:20,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:20,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:20,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:20,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:20,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:20,668 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:20,669 INFO L85 PathProgramCache]: Analyzing trace with hash -125416748, now seen corresponding path program 13 times [2022-11-20 09:36:20,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:20,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789274758] [2022-11-20 09:36:20,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:36:20,669 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 [2022-11-20 09:36:20,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:20,672 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:20,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-20 09:36:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:20,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:21,106 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:21,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:21,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:22,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:22,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789274758] [2022-11-20 09:36:22,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789274758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:22,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:22,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:22,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139668978] [2022-11-20 09:36:22,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:22,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:22,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:22,029 INFO L87 Difference]: Start difference. First operand 12721 states and 61574 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:22,373 INFO L93 Difference]: Finished difference Result 13088 states and 63509 transitions. [2022-11-20 09:36:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:22,422 INFO L225 Difference]: With dead ends: 13088 [2022-11-20 09:36:22,423 INFO L226 Difference]: Without dead ends: 13088 [2022-11-20 09:36:22,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:36:22,423 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:22,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-20 09:36:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2022-11-20 09:36:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 12718. [2022-11-20 09:36:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12718 states, 12713 states have (on average 4.8426020608825615) internal successors, (61564), 12717 states have internal predecessors, (61564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12718 states to 12718 states and 61564 transitions. [2022-11-20 09:36:22,751 INFO L78 Accepts]: Start accepts. Automaton has 12718 states and 61564 transitions. Word has length 14 [2022-11-20 09:36:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:22,751 INFO L495 AbstractCegarLoop]: Abstraction has 12718 states and 61564 transitions. [2022-11-20 09:36:22,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 12718 states and 61564 transitions. [2022-11-20 09:36:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:22,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:22,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:22,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:22,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:22,969 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:22,969 INFO L85 PathProgramCache]: Analyzing trace with hash -133912298, now seen corresponding path program 14 times [2022-11-20 09:36:22,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:22,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366198168] [2022-11-20 09:36:22,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:36:22,970 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 [2022-11-20 09:36:22,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:22,971 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:22,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-20 09:36:23,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:23,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:23,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:23,432 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:23,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:23,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:24,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:24,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366198168] [2022-11-20 09:36:24,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366198168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:24,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:24,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:24,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777602396] [2022-11-20 09:36:24,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:24,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:24,375 INFO L87 Difference]: Start difference. First operand 12718 states and 61564 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:25,104 INFO L93 Difference]: Finished difference Result 14061 states and 67978 transitions. [2022-11-20 09:36:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:36:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:25,156 INFO L225 Difference]: With dead ends: 14061 [2022-11-20 09:36:25,156 INFO L226 Difference]: Without dead ends: 14061 [2022-11-20 09:36:25,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:25,157 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:25,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 86 Unchecked, 0.6s Time] [2022-11-20 09:36:25,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14061 states. [2022-11-20 09:36:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14061 to 12306. [2022-11-20 09:36:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12306 states, 12301 states have (on average 4.818957808308268) internal successors, (59278), 12305 states have internal predecessors, (59278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12306 states to 12306 states and 59278 transitions. [2022-11-20 09:36:25,569 INFO L78 Accepts]: Start accepts. Automaton has 12306 states and 59278 transitions. Word has length 14 [2022-11-20 09:36:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:25,569 INFO L495 AbstractCegarLoop]: Abstraction has 12306 states and 59278 transitions. [2022-11-20 09:36:25,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:25,570 INFO L276 IsEmpty]: Start isEmpty. Operand 12306 states and 59278 transitions. [2022-11-20 09:36:25,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:25,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:25,573 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:25,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-11-20 09:36:25,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:25,773 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:25,774 INFO L85 PathProgramCache]: Analyzing trace with hash -134195483, now seen corresponding path program 6 times [2022-11-20 09:36:25,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:25,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174465712] [2022-11-20 09:36:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:36:25,775 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 [2022-11-20 09:36:25,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:25,776 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:25,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-20 09:36:26,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 09:36:26,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:26,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:36:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:26,285 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:26,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:26,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:28,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:28,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174465712] [2022-11-20 09:36:28,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174465712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:28,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:28,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:36:28,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767293927] [2022-11-20 09:36:28,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:28,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:36:28,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:36:28,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:36:28,109 INFO L87 Difference]: Start difference. First operand 12306 states and 59278 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:36:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:31,891 INFO L93 Difference]: Finished difference Result 12323 states and 59345 transitions. [2022-11-20 09:36:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:36:31,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 [2022-11-20 09:36:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:31,938 INFO L225 Difference]: With dead ends: 12323 [2022-11-20 09:36:31,938 INFO L226 Difference]: Without dead ends: 12323 [2022-11-20 09:36:31,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2022-11-20 09:36:31,939 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:31,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 41 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 159 Invalid, 0 Unknown, 73 Unchecked, 1.2s Time] [2022-11-20 09:36:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12323 states. [2022-11-20 09:36:32,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12323 to 12314. [2022-11-20 09:36:32,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12314 states, 12309 states have (on average 4.818425542286132) internal successors, (59310), 12313 states have internal predecessors, (59310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12314 states to 12314 states and 59310 transitions. [2022-11-20 09:36:32,268 INFO L78 Accepts]: Start accepts. Automaton has 12314 states and 59310 transitions. Word has length 14 [2022-11-20 09:36:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:32,268 INFO L495 AbstractCegarLoop]: Abstraction has 12314 states and 59310 transitions. [2022-11-20 09:36:32,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:36:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 12314 states and 59310 transitions. [2022-11-20 09:36:32,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:32,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:32,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:32,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:32,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:32,472 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:32,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:32,472 INFO L85 PathProgramCache]: Analyzing trace with hash -533409991, now seen corresponding path program 5 times [2022-11-20 09:36:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:32,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577643986] [2022-11-20 09:36:32,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:36:32,473 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 [2022-11-20 09:36:32,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:32,473 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:32,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-20 09:36:32,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:36:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:32,946 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:32,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:34,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:34,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577643986] [2022-11-20 09:36:34,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577643986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:34,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:34,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:36:34,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708032206] [2022-11-20 09:36:34,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:36:34,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:36:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:36:34,201 INFO L87 Difference]: Start difference. First operand 12314 states and 59310 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:36:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:35,060 INFO L93 Difference]: Finished difference Result 12712 states and 61177 transitions. [2022-11-20 09:36:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:36:35,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:36:35,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:35,114 INFO L225 Difference]: With dead ends: 12712 [2022-11-20 09:36:35,114 INFO L226 Difference]: Without dead ends: 12712 [2022-11-20 09:36:35,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:36:35,114 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:35,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 106 Unchecked, 0.7s Time] [2022-11-20 09:36:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12712 states. [2022-11-20 09:36:35,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12712 to 12322. [2022-11-20 09:36:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12322 states, 12317 states have (on average 4.817893967686937) internal successors, (59342), 12321 states have internal predecessors, (59342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12322 states to 12322 states and 59342 transitions. [2022-11-20 09:36:35,454 INFO L78 Accepts]: Start accepts. Automaton has 12322 states and 59342 transitions. Word has length 14 [2022-11-20 09:36:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:35,454 INFO L495 AbstractCegarLoop]: Abstraction has 12322 states and 59342 transitions. [2022-11-20 09:36:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:36:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 12322 states and 59342 transitions. [2022-11-20 09:36:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:35,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:35,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:35,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-20 09:36:35,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:35,658 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash -532919881, now seen corresponding path program 6 times [2022-11-20 09:36:35,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846808230] [2022-11-20 09:36:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:36:35,659 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 [2022-11-20 09:36:35,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:35,660 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:35,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-20 09:36:35,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:36:35,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:35,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:36,122 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:36,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:36,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:37,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:37,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846808230] [2022-11-20 09:36:37,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846808230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:37,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:37,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912783164] [2022-11-20 09:36:37,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:37,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:37,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:37,042 INFO L87 Difference]: Start difference. First operand 12322 states and 59342 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:37,748 INFO L93 Difference]: Finished difference Result 12898 states and 62064 transitions. [2022-11-20 09:36:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:37,798 INFO L225 Difference]: With dead ends: 12898 [2022-11-20 09:36:37,798 INFO L226 Difference]: Without dead ends: 12898 [2022-11-20 09:36:37,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:37,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:37,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 25 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-11-20 09:36:37,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12898 states. [2022-11-20 09:36:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12898 to 12433. [2022-11-20 09:36:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12433 states, 12428 states have (on average 4.819037656903766) internal successors, (59891), 12432 states have internal predecessors, (59891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12433 states to 12433 states and 59891 transitions. [2022-11-20 09:36:38,220 INFO L78 Accepts]: Start accepts. Automaton has 12433 states and 59891 transitions. Word has length 14 [2022-11-20 09:36:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:38,220 INFO L495 AbstractCegarLoop]: Abstraction has 12433 states and 59891 transitions. [2022-11-20 09:36:38,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 12433 states and 59891 transitions. [2022-11-20 09:36:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:38,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:38,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:38,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:38,425 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -537610522, now seen corresponding path program 4 times [2022-11-20 09:36:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:38,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195662488] [2022-11-20 09:36:38,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:38,426 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 [2022-11-20 09:36:38,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:38,429 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:38,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-20 09:36:38,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:38,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:38,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:38,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:38,950 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:38,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:39,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:39,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:39,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195662488] [2022-11-20 09:36:39,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195662488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:39,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:39,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:39,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205319480] [2022-11-20 09:36:39,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:39,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:39,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:39,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:39,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:39,954 INFO L87 Difference]: Start difference. First operand 12433 states and 59891 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:40,796 INFO L93 Difference]: Finished difference Result 13112 states and 63062 transitions. [2022-11-20 09:36:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:40,851 INFO L225 Difference]: With dead ends: 13112 [2022-11-20 09:36:40,852 INFO L226 Difference]: Without dead ends: 13112 [2022-11-20 09:36:40,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:40,852 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:40,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 33 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 174 Unchecked, 0.7s Time] [2022-11-20 09:36:40,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13112 states. [2022-11-20 09:36:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13112 to 12417. [2022-11-20 09:36:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12417 states, 12412 states have (on average 4.819932323557847) internal successors, (59825), 12416 states have internal predecessors, (59825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12417 states to 12417 states and 59825 transitions. [2022-11-20 09:36:41,220 INFO L78 Accepts]: Start accepts. Automaton has 12417 states and 59825 transitions. Word has length 14 [2022-11-20 09:36:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:41,221 INFO L495 AbstractCegarLoop]: Abstraction has 12417 states and 59825 transitions. [2022-11-20 09:36:41,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:41,221 INFO L276 IsEmpty]: Start isEmpty. Operand 12417 states and 59825 transitions. [2022-11-20 09:36:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:41,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:41,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:41,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:41,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:41,439 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:41,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash -532636231, now seen corresponding path program 7 times [2022-11-20 09:36:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:41,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841093408] [2022-11-20 09:36:41,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:36:41,439 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 [2022-11-20 09:36:41,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:41,440 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:41,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-20 09:36:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:41,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:41,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:41,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:42,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:42,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:42,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:42,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841093408] [2022-11-20 09:36:42,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841093408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:42,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:42,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:42,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786806889] [2022-11-20 09:36:42,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:42,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:42,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:42,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:42,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:42,868 INFO L87 Difference]: Start difference. First operand 12417 states and 59825 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:43,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:43,473 INFO L93 Difference]: Finished difference Result 12648 states and 60960 transitions. [2022-11-20 09:36:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:43,527 INFO L225 Difference]: With dead ends: 12648 [2022-11-20 09:36:43,527 INFO L226 Difference]: Without dead ends: 12648 [2022-11-20 09:36:43,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:43,528 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:43,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2022-11-20 09:36:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12648 states. [2022-11-20 09:36:43,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12648 to 12417. [2022-11-20 09:36:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12417 states, 12412 states have (on average 4.819932323557847) internal successors, (59825), 12416 states have internal predecessors, (59825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12417 states to 12417 states and 59825 transitions. [2022-11-20 09:36:43,876 INFO L78 Accepts]: Start accepts. Automaton has 12417 states and 59825 transitions. Word has length 14 [2022-11-20 09:36:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:43,876 INFO L495 AbstractCegarLoop]: Abstraction has 12417 states and 59825 transitions. [2022-11-20 09:36:43,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 12417 states and 59825 transitions. [2022-11-20 09:36:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:43,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:43,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:43,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:44,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:44,095 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -532636014, now seen corresponding path program 15 times [2022-11-20 09:36:44,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:44,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389528188] [2022-11-20 09:36:44,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:36:44,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:44,097 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:44,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-20 09:36:44,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:36:44,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:44,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:44,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:44,595 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:44,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:44,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:45,627 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:45,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389528188] [2022-11-20 09:36:45,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389528188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:45,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:45,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:45,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821775940] [2022-11-20 09:36:45,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:45,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:45,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:45,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:45,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:45,628 INFO L87 Difference]: Start difference. First operand 12417 states and 59825 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:46,500 INFO L93 Difference]: Finished difference Result 13749 states and 66182 transitions. [2022-11-20 09:36:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:46,502 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:46,551 INFO L225 Difference]: With dead ends: 13749 [2022-11-20 09:36:46,552 INFO L226 Difference]: Without dead ends: 13749 [2022-11-20 09:36:46,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:46,552 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:46,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 29 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 76 Unchecked, 0.7s Time] [2022-11-20 09:36:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13749 states. [2022-11-20 09:36:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13749 to 12910. [2022-11-20 09:36:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12910 states, 12905 states have (on average 4.836574970941496) internal successors, (62416), 12909 states have internal predecessors, (62416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12910 states to 12910 states and 62416 transitions. [2022-11-20 09:36:46,892 INFO L78 Accepts]: Start accepts. Automaton has 12910 states and 62416 transitions. Word has length 14 [2022-11-20 09:36:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:46,892 INFO L495 AbstractCegarLoop]: Abstraction has 12910 states and 62416 transitions. [2022-11-20 09:36:46,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 12910 states and 62416 transitions. [2022-11-20 09:36:46,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:46,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:46,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:46,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-20 09:36:47,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:47,097 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:47,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:47,097 INFO L85 PathProgramCache]: Analyzing trace with hash -396356604, now seen corresponding path program 16 times [2022-11-20 09:36:47,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:47,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803622529] [2022-11-20 09:36:47,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:36:47,098 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 [2022-11-20 09:36:47,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:47,098 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:47,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-20 09:36:47,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:36:47,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:47,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:47,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:47,546 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:47,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:47,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:48,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:48,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803622529] [2022-11-20 09:36:48,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803622529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:48,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:48,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667733398] [2022-11-20 09:36:48,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:48,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:48,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:48,509 INFO L87 Difference]: Start difference. First operand 12910 states and 62416 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:49,290 INFO L93 Difference]: Finished difference Result 13690 states and 66189 transitions. [2022-11-20 09:36:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:49,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:49,347 INFO L225 Difference]: With dead ends: 13690 [2022-11-20 09:36:49,348 INFO L226 Difference]: Without dead ends: 13690 [2022-11-20 09:36:49,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:49,348 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:49,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2022-11-20 09:36:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13690 states. [2022-11-20 09:36:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13690 to 12908. [2022-11-20 09:36:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12908 states, 12903 states have (on average 4.836627140974967) internal successors, (62407), 12907 states have internal predecessors, (62407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12908 states to 12908 states and 62407 transitions. [2022-11-20 09:36:49,766 INFO L78 Accepts]: Start accepts. Automaton has 12908 states and 62407 transitions. Word has length 14 [2022-11-20 09:36:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:49,766 INFO L495 AbstractCegarLoop]: Abstraction has 12908 states and 62407 transitions. [2022-11-20 09:36:49,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 12908 states and 62407 transitions. [2022-11-20 09:36:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:49,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:49,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:49,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-20 09:36:49,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:49,970 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -396524934, now seen corresponding path program 17 times [2022-11-20 09:36:49,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:49,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324215315] [2022-11-20 09:36:49,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:36:49,971 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 [2022-11-20 09:36:49,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:49,972 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:49,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-20 09:36:50,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:50,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:50,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:36:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:50,467 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:50,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:50,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:51,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324215315] [2022-11-20 09:36:51,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324215315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:51,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:51,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:36:51,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031180655] [2022-11-20 09:36:51,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:51,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:36:51,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:36:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:36:51,801 INFO L87 Difference]: Start difference. First operand 12908 states and 62407 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:36:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:52,737 INFO L93 Difference]: Finished difference Result 13694 states and 66200 transitions. [2022-11-20 09:36:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:36:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:36:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:52,789 INFO L225 Difference]: With dead ends: 13694 [2022-11-20 09:36:52,789 INFO L226 Difference]: Without dead ends: 13694 [2022-11-20 09:36:52,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:36:52,790 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:52,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 38 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 62 Unchecked, 0.8s Time] [2022-11-20 09:36:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13694 states. [2022-11-20 09:36:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13694 to 12907. [2022-11-20 09:36:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12907 states, 12902 states have (on average 4.836769493101845) internal successors, (62404), 12906 states have internal predecessors, (62404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12907 states to 12907 states and 62404 transitions. [2022-11-20 09:36:53,099 INFO L78 Accepts]: Start accepts. Automaton has 12907 states and 62404 transitions. Word has length 14 [2022-11-20 09:36:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:53,100 INFO L495 AbstractCegarLoop]: Abstraction has 12907 states and 62404 transitions. [2022-11-20 09:36:53,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:36:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12907 states and 62404 transitions. [2022-11-20 09:36:53,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:53,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:53,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:53,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:53,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:53,304 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash 519403949, now seen corresponding path program 8 times [2022-11-20 09:36:53,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:53,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469710134] [2022-11-20 09:36:53,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:36:53,305 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 [2022-11-20 09:36:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:53,306 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:53,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-20 09:36:53,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:53,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:53,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:53,846 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:53,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:54,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:54,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:54,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:54,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469710134] [2022-11-20 09:36:54,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469710134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:54,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:54,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:54,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158731170] [2022-11-20 09:36:54,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:54,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:54,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:54,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:54,925 INFO L87 Difference]: Start difference. First operand 12907 states and 62404 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:55,686 INFO L93 Difference]: Finished difference Result 13506 states and 65232 transitions. [2022-11-20 09:36:55,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:36:55,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:55,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:55,750 INFO L225 Difference]: With dead ends: 13506 [2022-11-20 09:36:55,750 INFO L226 Difference]: Without dead ends: 13506 [2022-11-20 09:36:55,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:55,750 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:55,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-11-20 09:36:55,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13506 states. [2022-11-20 09:36:56,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13506 to 12982. [2022-11-20 09:36:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12982 states, 12977 states have (on average 4.838252292517531) internal successors, (62786), 12981 states have internal predecessors, (62786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:56,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12982 states to 12982 states and 62786 transitions. [2022-11-20 09:36:56,197 INFO L78 Accepts]: Start accepts. Automaton has 12982 states and 62786 transitions. Word has length 14 [2022-11-20 09:36:56,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:56,197 INFO L495 AbstractCegarLoop]: Abstraction has 12982 states and 62786 transitions. [2022-11-20 09:36:56,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 12982 states and 62786 transitions. [2022-11-20 09:36:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:56,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:56,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:56,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Ended with exit code 0 [2022-11-20 09:36:56,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:56,402 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash 519412319, now seen corresponding path program 9 times [2022-11-20 09:36:56,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:56,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041283193] [2022-11-20 09:36:56,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:36:56,403 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 [2022-11-20 09:36:56,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:56,409 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:56,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-20 09:36:56,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:36:56,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:56,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:36:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:56,992 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:56,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:36:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:57,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:36:58,083 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:36:58,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041283193] [2022-11-20 09:36:58,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041283193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:58,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:36:58,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:36:58,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653425336] [2022-11-20 09:36:58,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:36:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:58,084 INFO L87 Difference]: Start difference. First operand 12982 states and 62786 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:36:58,767 INFO L93 Difference]: Finished difference Result 13900 states and 67069 transitions. [2022-11-20 09:36:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:36:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:36:58,827 INFO L225 Difference]: With dead ends: 13900 [2022-11-20 09:36:58,828 INFO L226 Difference]: Without dead ends: 13900 [2022-11-20 09:36:58,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:36:58,828 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:36:58,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 20 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-11-20 09:36:58,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13900 states. [2022-11-20 09:36:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13900 to 13062. [2022-11-20 09:36:59,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13062 states, 13057 states have (on average 4.836715937811136) internal successors, (63153), 13061 states have internal predecessors, (63153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:59,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13062 states to 13062 states and 63153 transitions. [2022-11-20 09:36:59,255 INFO L78 Accepts]: Start accepts. Automaton has 13062 states and 63153 transitions. Word has length 14 [2022-11-20 09:36:59,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:36:59,256 INFO L495 AbstractCegarLoop]: Abstraction has 13062 states and 63153 transitions. [2022-11-20 09:36:59,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:36:59,256 INFO L276 IsEmpty]: Start isEmpty. Operand 13062 states and 63153 transitions. [2022-11-20 09:36:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:36:59,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:36:59,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:59,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-20 09:36:59,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:36:59,460 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:36:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash 389187488, now seen corresponding path program 5 times [2022-11-20 09:36:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:36:59,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254041224] [2022-11-20 09:36:59,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:36:59,461 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 [2022-11-20 09:36:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:36:59,462 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:36:59,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-20 09:36:59,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:36:59,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:36:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:36:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:59,936 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:36:59,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:00,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:01,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254041224] [2022-11-20 09:37:01,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254041224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:01,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:01,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:37:01,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857043619] [2022-11-20 09:37:01,085 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:01,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:37:01,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:01,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:37:01,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:37:01,086 INFO L87 Difference]: Start difference. First operand 13062 states and 63153 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:01,723 INFO L93 Difference]: Finished difference Result 13368 states and 64752 transitions. [2022-11-20 09:37:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:37:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:37:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:01,780 INFO L225 Difference]: With dead ends: 13368 [2022-11-20 09:37:01,780 INFO L226 Difference]: Without dead ends: 13368 [2022-11-20 09:37:01,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:37:01,780 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:01,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 54 Unchecked, 0.5s Time] [2022-11-20 09:37:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13368 states. [2022-11-20 09:37:02,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13368 to 13067. [2022-11-20 09:37:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13067 states, 13062 states have (on average 4.836778441280049) internal successors, (63178), 13066 states have internal predecessors, (63178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:02,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13067 states to 13067 states and 63178 transitions. [2022-11-20 09:37:02,109 INFO L78 Accepts]: Start accepts. Automaton has 13067 states and 63178 transitions. Word has length 14 [2022-11-20 09:37:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:02,109 INFO L495 AbstractCegarLoop]: Abstraction has 13067 states and 63178 transitions. [2022-11-20 09:37:02,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 13067 states and 63178 transitions. [2022-11-20 09:37:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:02,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:02,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:02,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:02,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:02,313 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:02,314 INFO L85 PathProgramCache]: Analyzing trace with hash 389195858, now seen corresponding path program 6 times [2022-11-20 09:37:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:02,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20019377] [2022-11-20 09:37:02,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:37:02,314 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 [2022-11-20 09:37:02,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:02,315 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:02,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-20 09:37:02,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:37:02,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:02,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:02,855 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:02,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:03,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:03,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:03,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20019377] [2022-11-20 09:37:03,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20019377] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:03,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:03,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:03,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945139433] [2022-11-20 09:37:03,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:03,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:03,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:03,895 INFO L87 Difference]: Start difference. First operand 13067 states and 63178 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:04,531 INFO L93 Difference]: Finished difference Result 13877 states and 67336 transitions. [2022-11-20 09:37:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:04,588 INFO L225 Difference]: With dead ends: 13877 [2022-11-20 09:37:04,589 INFO L226 Difference]: Without dead ends: 13877 [2022-11-20 09:37:04,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:04,589 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:04,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 30 Unchecked, 0.5s Time] [2022-11-20 09:37:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13877 states. [2022-11-20 09:37:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13877 to 13159. [2022-11-20 09:37:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13159 states, 13154 states have (on average 4.842329329481527) internal successors, (63696), 13158 states have internal predecessors, (63696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13159 states to 13159 states and 63696 transitions. [2022-11-20 09:37:04,932 INFO L78 Accepts]: Start accepts. Automaton has 13159 states and 63696 transitions. Word has length 14 [2022-11-20 09:37:04,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:04,932 INFO L495 AbstractCegarLoop]: Abstraction has 13159 states and 63696 transitions. [2022-11-20 09:37:04,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13159 states and 63696 transitions. [2022-11-20 09:37:04,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:04,936 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:04,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:04,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:05,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:05,136 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 380875799, now seen corresponding path program 10 times [2022-11-20 09:37:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:05,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362557664] [2022-11-20 09:37:05,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:37:05,137 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 [2022-11-20 09:37:05,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:05,138 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:05,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-20 09:37:05,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:37:05,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:05,618 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:05,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:05,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:06,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362557664] [2022-11-20 09:37:06,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362557664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:06,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:06,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:06,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156134911] [2022-11-20 09:37:06,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:06,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:06,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:06,603 INFO L87 Difference]: Start difference. First operand 13159 states and 63696 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:07,343 INFO L93 Difference]: Finished difference Result 13393 states and 64765 transitions. [2022-11-20 09:37:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:07,345 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:07,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:07,402 INFO L225 Difference]: With dead ends: 13393 [2022-11-20 09:37:07,402 INFO L226 Difference]: Without dead ends: 13393 [2022-11-20 09:37:07,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:07,402 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:07,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 66 Unchecked, 0.6s Time] [2022-11-20 09:37:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13393 states. [2022-11-20 09:37:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13393 to 13159. [2022-11-20 09:37:07,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13159 states, 13154 states have (on average 4.842329329481527) internal successors, (63696), 13158 states have internal predecessors, (63696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13159 states to 13159 states and 63696 transitions. [2022-11-20 09:37:07,960 INFO L78 Accepts]: Start accepts. Automaton has 13159 states and 63696 transitions. Word has length 14 [2022-11-20 09:37:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:07,961 INFO L495 AbstractCegarLoop]: Abstraction has 13159 states and 63696 transitions. [2022-11-20 09:37:07,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 13159 states and 63696 transitions. [2022-11-20 09:37:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:07,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:07,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:07,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-20 09:37:08,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:08,166 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:08,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:08,167 INFO L85 PathProgramCache]: Analyzing trace with hash 380884169, now seen corresponding path program 11 times [2022-11-20 09:37:08,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:08,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991177252] [2022-11-20 09:37:08,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:37:08,167 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 [2022-11-20 09:37:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:08,168 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:08,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-20 09:37:08,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:08,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:37:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:08,672 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:08,673 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:09,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:09,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:09,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991177252] [2022-11-20 09:37:09,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991177252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:09,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:09,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:37:09,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834216820] [2022-11-20 09:37:09,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:09,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:37:09,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:37:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:37:09,885 INFO L87 Difference]: Start difference. First operand 13159 states and 63696 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:10,439 INFO L93 Difference]: Finished difference Result 13548 states and 65559 transitions. [2022-11-20 09:37:10,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:10,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:37:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:10,488 INFO L225 Difference]: With dead ends: 13548 [2022-11-20 09:37:10,488 INFO L226 Difference]: Without dead ends: 13548 [2022-11-20 09:37:10,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:37:10,488 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:10,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-11-20 09:37:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13548 states. [2022-11-20 09:37:10,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13548 to 13160. [2022-11-20 09:37:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13160 states, 13155 states have (on average 4.842113264918282) internal successors, (63698), 13159 states have internal predecessors, (63698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 63698 transitions. [2022-11-20 09:37:10,817 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 63698 transitions. Word has length 14 [2022-11-20 09:37:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:10,818 INFO L495 AbstractCegarLoop]: Abstraction has 13160 states and 63698 transitions. [2022-11-20 09:37:10,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 63698 transitions. [2022-11-20 09:37:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:10,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:10,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:10,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-20 09:37:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:11,023 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:11,023 INFO L85 PathProgramCache]: Analyzing trace with hash 381365909, now seen corresponding path program 12 times [2022-11-20 09:37:11,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:11,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68008852] [2022-11-20 09:37:11,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:37:11,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:11,025 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:11,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-20 09:37:11,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:37:11,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:11,545 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:11,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:11,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:12,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:12,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:12,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68008852] [2022-11-20 09:37:12,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68008852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:12,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:12,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:12,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46611356] [2022-11-20 09:37:12,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:12,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:12,570 INFO L87 Difference]: Start difference. First operand 13160 states and 63698 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:13,249 INFO L93 Difference]: Finished difference Result 13573 states and 65604 transitions. [2022-11-20 09:37:13,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:37:13,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:13,306 INFO L225 Difference]: With dead ends: 13573 [2022-11-20 09:37:13,307 INFO L226 Difference]: Without dead ends: 13573 [2022-11-20 09:37:13,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:13,307 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:13,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-20 09:37:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13573 states. [2022-11-20 09:37:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13573 to 13200. [2022-11-20 09:37:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13200 states, 13195 states have (on average 4.841682455475559) internal successors, (63886), 13199 states have internal predecessors, (63886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13200 states to 13200 states and 63886 transitions. [2022-11-20 09:37:13,642 INFO L78 Accepts]: Start accepts. Automaton has 13200 states and 63886 transitions. Word has length 14 [2022-11-20 09:37:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:13,642 INFO L495 AbstractCegarLoop]: Abstraction has 13200 states and 63886 transitions. [2022-11-20 09:37:13,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:13,642 INFO L276 IsEmpty]: Start isEmpty. Operand 13200 states and 63886 transitions. [2022-11-20 09:37:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:13,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:13,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:13,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Ended with exit code 0 [2022-11-20 09:37:13,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:13,846 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash 381230408, now seen corresponding path program 7 times [2022-11-20 09:37:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:13,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871863543] [2022-11-20 09:37:13,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:37:13,847 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 [2022-11-20 09:37:13,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:13,848 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:13,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-20 09:37:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:14,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:14,315 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:14,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:14,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:15,272 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:15,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871863543] [2022-11-20 09:37:15,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871863543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:15,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:15,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:15,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446833654] [2022-11-20 09:37:15,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:15,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:15,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:15,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:15,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:15,273 INFO L87 Difference]: Start difference. First operand 13200 states and 63886 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:15,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:15,937 INFO L93 Difference]: Finished difference Result 13603 states and 65959 transitions. [2022-11-20 09:37:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:15,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:15,992 INFO L225 Difference]: With dead ends: 13603 [2022-11-20 09:37:15,992 INFO L226 Difference]: Without dead ends: 13603 [2022-11-20 09:37:15,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:15,993 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:15,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-20 09:37:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13603 states. [2022-11-20 09:37:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13603 to 13211. [2022-11-20 09:37:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13211 states, 13206 states have (on average 4.841435711040436) internal successors, (63936), 13210 states have internal predecessors, (63936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:16,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13211 states to 13211 states and 63936 transitions. [2022-11-20 09:37:16,393 INFO L78 Accepts]: Start accepts. Automaton has 13211 states and 63936 transitions. Word has length 14 [2022-11-20 09:37:16,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:16,393 INFO L495 AbstractCegarLoop]: Abstraction has 13211 states and 63936 transitions. [2022-11-20 09:37:16,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 13211 states and 63936 transitions. [2022-11-20 09:37:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:16,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:16,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:16,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-20 09:37:16,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:16,598 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:16,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:16,598 INFO L85 PathProgramCache]: Analyzing trace with hash 376675268, now seen corresponding path program 8 times [2022-11-20 09:37:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:16,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928755808] [2022-11-20 09:37:16,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:37:16,599 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 [2022-11-20 09:37:16,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:16,600 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:16,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-20 09:37:17,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:17,212 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:17,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:17,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:18,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:18,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928755808] [2022-11-20 09:37:18,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928755808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:18,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:18,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:18,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688456168] [2022-11-20 09:37:18,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:18,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:18,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:18,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:18,237 INFO L87 Difference]: Start difference. First operand 13211 states and 63936 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:19,042 INFO L93 Difference]: Finished difference Result 14056 states and 68270 transitions. [2022-11-20 09:37:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:19,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:19,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:19,099 INFO L225 Difference]: With dead ends: 14056 [2022-11-20 09:37:19,099 INFO L226 Difference]: Without dead ends: 14056 [2022-11-20 09:37:19,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:19,099 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:19,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 27 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 107 Unchecked, 0.6s Time] [2022-11-20 09:37:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14056 states. [2022-11-20 09:37:19,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14056 to 13506. [2022-11-20 09:37:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13506 states, 13501 states have (on average 4.855269980001482) internal successors, (65551), 13505 states have internal predecessors, (65551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13506 states to 13506 states and 65551 transitions. [2022-11-20 09:37:19,456 INFO L78 Accepts]: Start accepts. Automaton has 13506 states and 65551 transitions. Word has length 14 [2022-11-20 09:37:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:19,456 INFO L495 AbstractCegarLoop]: Abstraction has 13506 states and 65551 transitions. [2022-11-20 09:37:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 13506 states and 65551 transitions. [2022-11-20 09:37:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:19,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:19,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:19,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:19,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:19,660 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash 376683638, now seen corresponding path program 9 times [2022-11-20 09:37:19,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:19,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2109208181] [2022-11-20 09:37:19,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:37:19,661 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 [2022-11-20 09:37:19,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:19,662 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:19,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-11-20 09:37:20,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:37:20,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:20,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:20,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:20,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:20,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:20,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:21,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2109208181] [2022-11-20 09:37:21,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2109208181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:21,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:21,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:21,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766707350] [2022-11-20 09:37:21,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:21,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:21,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:21,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:21,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:21,158 INFO L87 Difference]: Start difference. First operand 13506 states and 65551 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:21,988 INFO L93 Difference]: Finished difference Result 14612 states and 71280 transitions. [2022-11-20 09:37:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:22,048 INFO L225 Difference]: With dead ends: 14612 [2022-11-20 09:37:22,048 INFO L226 Difference]: Without dead ends: 14612 [2022-11-20 09:37:22,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:22,048 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:22,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 26 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 85 Unchecked, 0.7s Time] [2022-11-20 09:37:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14612 states. [2022-11-20 09:37:22,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14612 to 13722. [2022-11-20 09:37:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13722 states, 13717 states have (on average 4.869140482612816) internal successors, (66790), 13721 states have internal predecessors, (66790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:22,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13722 states to 13722 states and 66790 transitions. [2022-11-20 09:37:22,396 INFO L78 Accepts]: Start accepts. Automaton has 13722 states and 66790 transitions. Word has length 14 [2022-11-20 09:37:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 13722 states and 66790 transitions. [2022-11-20 09:37:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:22,397 INFO L276 IsEmpty]: Start isEmpty. Operand 13722 states and 66790 transitions. [2022-11-20 09:37:22,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:22,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:22,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:22,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:22,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:22,601 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash 381649559, now seen corresponding path program 13 times [2022-11-20 09:37:22,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:22,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77667293] [2022-11-20 09:37:22,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:37:22,602 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 [2022-11-20 09:37:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:22,603 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:22,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-20 09:37:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:22,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:22,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:23,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:23,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:23,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:23,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:24,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:24,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77667293] [2022-11-20 09:37:24,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77667293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:24,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:24,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:24,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754003404] [2022-11-20 09:37:24,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:24,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:24,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:24,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:24,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:24,066 INFO L87 Difference]: Start difference. First operand 13722 states and 66790 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:24,585 INFO L93 Difference]: Finished difference Result 14043 states and 68422 transitions. [2022-11-20 09:37:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:24,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:24,642 INFO L225 Difference]: With dead ends: 14043 [2022-11-20 09:37:24,643 INFO L226 Difference]: Without dead ends: 14043 [2022-11-20 09:37:24,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:24,643 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:24,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 23 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-20 09:37:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14043 states. [2022-11-20 09:37:24,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14043 to 13722. [2022-11-20 09:37:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13722 states, 13717 states have (on average 4.869140482612816) internal successors, (66790), 13721 states have internal predecessors, (66790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13722 states to 13722 states and 66790 transitions. [2022-11-20 09:37:24,989 INFO L78 Accepts]: Start accepts. Automaton has 13722 states and 66790 transitions. Word has length 14 [2022-11-20 09:37:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:24,989 INFO L495 AbstractCegarLoop]: Abstraction has 13722 states and 66790 transitions. [2022-11-20 09:37:24,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13722 states and 66790 transitions. [2022-11-20 09:37:24,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:24,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:24,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:25,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:25,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:25,193 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 381645188, now seen corresponding path program 10 times [2022-11-20 09:37:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988500707] [2022-11-20 09:37:25,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:37:25,194 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 [2022-11-20 09:37:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:25,195 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:25,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-20 09:37:25,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:37:25,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:25,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:25,670 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:25,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:26,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:26,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:26,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988500707] [2022-11-20 09:37:26,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988500707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:26,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:26,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:26,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370299782] [2022-11-20 09:37:26,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:26,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:26,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:26,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:26,605 INFO L87 Difference]: Start difference. First operand 13722 states and 66790 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:27,327 INFO L93 Difference]: Finished difference Result 14179 states and 69262 transitions. [2022-11-20 09:37:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:27,383 INFO L225 Difference]: With dead ends: 14179 [2022-11-20 09:37:27,383 INFO L226 Difference]: Without dead ends: 14179 [2022-11-20 09:37:27,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:27,384 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:27,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-20 09:37:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14179 states. [2022-11-20 09:37:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14179 to 13721. [2022-11-20 09:37:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13721 states, 13716 states have (on average 4.8691309419655875) internal successors, (66785), 13720 states have internal predecessors, (66785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13721 states to 13721 states and 66785 transitions. [2022-11-20 09:37:27,719 INFO L78 Accepts]: Start accepts. Automaton has 13721 states and 66785 transitions. Word has length 14 [2022-11-20 09:37:27,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:27,720 INFO L495 AbstractCegarLoop]: Abstraction has 13721 states and 66785 transitions. [2022-11-20 09:37:27,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:27,720 INFO L276 IsEmpty]: Start isEmpty. Operand 13721 states and 66785 transitions. [2022-11-20 09:37:27,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:27,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:27,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:27,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Ended with exit code 0 [2022-11-20 09:37:27,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:27,924 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1370282619, now seen corresponding path program 14 times [2022-11-20 09:37:27,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:27,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675679892] [2022-11-20 09:37:27,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:37:27,925 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 [2022-11-20 09:37:27,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:27,926 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:27,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-20 09:37:28,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:28,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:28,455 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:28,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:28,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:29,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:29,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675679892] [2022-11-20 09:37:29,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675679892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:29,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:29,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:29,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459866340] [2022-11-20 09:37:29,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:29,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:29,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:29,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:29,492 INFO L87 Difference]: Start difference. First operand 13721 states and 66785 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:30,138 INFO L93 Difference]: Finished difference Result 14633 states and 71161 transitions. [2022-11-20 09:37:30,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:30,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:30,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:30,201 INFO L225 Difference]: With dead ends: 14633 [2022-11-20 09:37:30,201 INFO L226 Difference]: Without dead ends: 14633 [2022-11-20 09:37:30,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:30,201 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:30,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-11-20 09:37:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14633 states. [2022-11-20 09:37:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14633 to 13741. [2022-11-20 09:37:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13741 states, 13736 states have (on average 4.869103086779266) internal successors, (66882), 13740 states have internal predecessors, (66882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 66882 transitions. [2022-11-20 09:37:30,544 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 66882 transitions. Word has length 14 [2022-11-20 09:37:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:30,544 INFO L495 AbstractCegarLoop]: Abstraction has 13741 states and 66882 transitions. [2022-11-20 09:37:30,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 66882 transitions. [2022-11-20 09:37:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:30,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:30,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:30,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:30,748 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1374483150, now seen corresponding path program 11 times [2022-11-20 09:37:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:30,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944570826] [2022-11-20 09:37:30,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:37:30,749 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 [2022-11-20 09:37:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:30,750 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:30,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-20 09:37:31,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:31,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:37:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:31,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:31,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:31,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:32,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:32,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944570826] [2022-11-20 09:37:32,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944570826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:32,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:32,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:37:32,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640643403] [2022-11-20 09:37:32,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:32,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:37:32,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:37:32,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:37:32,511 INFO L87 Difference]: Start difference. First operand 13741 states and 66882 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:33,311 INFO L93 Difference]: Finished difference Result 13940 states and 67905 transitions. [2022-11-20 09:37:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:37:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:33,371 INFO L225 Difference]: With dead ends: 13940 [2022-11-20 09:37:33,372 INFO L226 Difference]: Without dead ends: 13940 [2022-11-20 09:37:33,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:37:33,372 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:33,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 41 Unchecked, 0.6s Time] [2022-11-20 09:37:33,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13940 states. [2022-11-20 09:37:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13940 to 13740. [2022-11-20 09:37:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13740 states, 13735 states have (on average 4.869020749908992) internal successors, (66876), 13739 states have internal predecessors, (66876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13740 states to 13740 states and 66876 transitions. [2022-11-20 09:37:33,745 INFO L78 Accepts]: Start accepts. Automaton has 13740 states and 66876 transitions. Word has length 14 [2022-11-20 09:37:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:33,745 INFO L495 AbstractCegarLoop]: Abstraction has 13740 states and 66876 transitions. [2022-11-20 09:37:33,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 13740 states and 66876 transitions. [2022-11-20 09:37:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:33,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:33,749 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:33,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-20 09:37:33,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:33,950 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1384552787, now seen corresponding path program 7 times [2022-11-20 09:37:33,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:33,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358726839] [2022-11-20 09:37:33,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:37:33,951 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 [2022-11-20 09:37:33,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:33,952 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:33,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-20 09:37:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:37:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:34,488 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:34,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:35,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:36,717 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:36,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358726839] [2022-11-20 09:37:36,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358726839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:36,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:36,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:37:36,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126339038] [2022-11-20 09:37:36,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:36,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:37:36,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:37:36,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:37:36,719 INFO L87 Difference]: Start difference. First operand 13740 states and 66876 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:37:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:40,377 INFO L93 Difference]: Finished difference Result 13757 states and 66934 transitions. [2022-11-20 09:37:40,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:37:40,379 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 [2022-11-20 09:37:40,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:40,433 INFO L225 Difference]: With dead ends: 13757 [2022-11-20 09:37:40,433 INFO L226 Difference]: Without dead ends: 13757 [2022-11-20 09:37:40,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:37:40,434 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:40,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 50 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 129 Unchecked, 1.3s Time] [2022-11-20 09:37:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2022-11-20 09:37:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13746. [2022-11-20 09:37:40,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13746 states, 13741 states have (on average 4.868059093224656) internal successors, (66892), 13745 states have internal predecessors, (66892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13746 states to 13746 states and 66892 transitions. [2022-11-20 09:37:40,870 INFO L78 Accepts]: Start accepts. Automaton has 13746 states and 66892 transitions. Word has length 14 [2022-11-20 09:37:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:40,871 INFO L495 AbstractCegarLoop]: Abstraction has 13746 states and 66892 transitions. [2022-11-20 09:37:40,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:37:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 13746 states and 66892 transitions. [2022-11-20 09:37:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:40,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:40,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:40,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:41,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:41,076 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:41,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1781867061, now seen corresponding path program 1 times [2022-11-20 09:37:41,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:41,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795846207] [2022-11-20 09:37:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:41,077 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 [2022-11-20 09:37:41,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:41,078 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:41,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-20 09:37:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:41,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:41,594 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:41,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:41,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:42,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:42,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795846207] [2022-11-20 09:37:42,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795846207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:42,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:42,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:42,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068225229] [2022-11-20 09:37:42,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:42,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:42,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:42,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:42,542 INFO L87 Difference]: Start difference. First operand 13746 states and 66892 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:42,929 INFO L93 Difference]: Finished difference Result 13860 states and 67402 transitions. [2022-11-20 09:37:42,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:42,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:42,984 INFO L225 Difference]: With dead ends: 13860 [2022-11-20 09:37:42,984 INFO L226 Difference]: Without dead ends: 13860 [2022-11-20 09:37:42,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:42,985 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:42,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-11-20 09:37:43,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13860 states. [2022-11-20 09:37:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13860 to 13752. [2022-11-20 09:37:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13752 states, 13747 states have (on average 4.867680221139158) internal successors, (66916), 13751 states have internal predecessors, (66916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13752 states to 13752 states and 66916 transitions. [2022-11-20 09:37:43,344 INFO L78 Accepts]: Start accepts. Automaton has 13752 states and 66916 transitions. Word has length 14 [2022-11-20 09:37:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:43,345 INFO L495 AbstractCegarLoop]: Abstraction has 13752 states and 66916 transitions. [2022-11-20 09:37:43,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 13752 states and 66916 transitions. [2022-11-20 09:37:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:43,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:43,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:43,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:43,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:43,550 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:43,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:43,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1781873571, now seen corresponding path program 2 times [2022-11-20 09:37:43,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:43,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326566558] [2022-11-20 09:37:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:37:43,551 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 [2022-11-20 09:37:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:43,552 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:43,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-20 09:37:43,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:43,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:43,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:43,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:44,121 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:44,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:44,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:45,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:45,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326566558] [2022-11-20 09:37:45,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326566558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:45,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:45,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:45,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236414855] [2022-11-20 09:37:45,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:45,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:45,130 INFO L87 Difference]: Start difference. First operand 13752 states and 66916 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:45,691 INFO L93 Difference]: Finished difference Result 14004 states and 67946 transitions. [2022-11-20 09:37:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:45,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:45,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:45,749 INFO L225 Difference]: With dead ends: 14004 [2022-11-20 09:37:45,749 INFO L226 Difference]: Without dead ends: 14004 [2022-11-20 09:37:45,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:45,750 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:45,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 22 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-20 09:37:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14004 states. [2022-11-20 09:37:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14004 to 13804. [2022-11-20 09:37:46,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13804 states, 13799 states have (on average 4.866149720994275) internal successors, (67148), 13803 states have internal predecessors, (67148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 67148 transitions. [2022-11-20 09:37:46,118 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 67148 transitions. Word has length 14 [2022-11-20 09:37:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:46,118 INFO L495 AbstractCegarLoop]: Abstraction has 13804 states and 67148 transitions. [2022-11-20 09:37:46,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 67148 transitions. [2022-11-20 09:37:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:46,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:46,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:46,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:46,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:46,323 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1787034141, now seen corresponding path program 3 times [2022-11-20 09:37:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:46,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777722657] [2022-11-20 09:37:46,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:37:46,324 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 [2022-11-20 09:37:46,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:46,325 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:46,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-20 09:37:46,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:37:46,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:46,916 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:46,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:47,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:47,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:47,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777722657] [2022-11-20 09:37:47,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777722657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:47,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:47,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:47,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858460524] [2022-11-20 09:37:47,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:47,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:47,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:47,950 INFO L87 Difference]: Start difference. First operand 13804 states and 67148 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:48,187 INFO L93 Difference]: Finished difference Result 13988 states and 68018 transitions. [2022-11-20 09:37:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:37:48,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:48,240 INFO L225 Difference]: With dead ends: 13988 [2022-11-20 09:37:48,240 INFO L226 Difference]: Without dead ends: 13988 [2022-11-20 09:37:48,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:48,240 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:48,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-20 09:37:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13988 states. [2022-11-20 09:37:48,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13988 to 13834. [2022-11-20 09:37:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13834 states, 13829 states have (on average 4.866295466049606) internal successors, (67296), 13833 states have internal predecessors, (67296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13834 states to 13834 states and 67296 transitions. [2022-11-20 09:37:48,746 INFO L78 Accepts]: Start accepts. Automaton has 13834 states and 67296 transitions. Word has length 14 [2022-11-20 09:37:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:48,747 INFO L495 AbstractCegarLoop]: Abstraction has 13834 states and 67296 transitions. [2022-11-20 09:37:48,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 13834 states and 67296 transitions. [2022-11-20 09:37:48,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:48,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:48,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:48,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Ended with exit code 0 [2022-11-20 09:37:48,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:48,952 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:48,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1769354841, now seen corresponding path program 4 times [2022-11-20 09:37:48,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:48,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139897053] [2022-11-20 09:37:48,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:37:48,954 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 [2022-11-20 09:37:48,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:48,954 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:48,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-20 09:37:49,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:37:49,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:49,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:49,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:49,457 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:49,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:49,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:50,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:50,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139897053] [2022-11-20 09:37:50,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139897053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:50,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:50,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:50,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091189269] [2022-11-20 09:37:50,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:50,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:50,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:50,531 INFO L87 Difference]: Start difference. First operand 13834 states and 67296 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:51,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:51,107 INFO L93 Difference]: Finished difference Result 13972 states and 67842 transitions. [2022-11-20 09:37:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:37:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:51,163 INFO L225 Difference]: With dead ends: 13972 [2022-11-20 09:37:51,163 INFO L226 Difference]: Without dead ends: 13972 [2022-11-20 09:37:51,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:51,163 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:51,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-11-20 09:37:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13972 states. [2022-11-20 09:37:51,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13972 to 13836. [2022-11-20 09:37:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13836 states, 13831 states have (on average 4.866170197382691) internal successors, (67304), 13835 states have internal predecessors, (67304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13836 states to 13836 states and 67304 transitions. [2022-11-20 09:37:51,542 INFO L78 Accepts]: Start accepts. Automaton has 13836 states and 67304 transitions. Word has length 14 [2022-11-20 09:37:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:51,542 INFO L495 AbstractCegarLoop]: Abstraction has 13836 states and 67304 transitions. [2022-11-20 09:37:51,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:51,542 INFO L276 IsEmpty]: Start isEmpty. Operand 13836 states and 67304 transitions. [2022-11-20 09:37:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:51,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:51,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:51,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:51,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:51,747 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash 2031812377, now seen corresponding path program 5 times [2022-11-20 09:37:51,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381976371] [2022-11-20 09:37:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:37:51,748 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 [2022-11-20 09:37:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:51,749 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:51,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-20 09:37:52,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:37:52,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:52,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:37:52,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:52,271 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:52,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:52,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:53,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:53,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381976371] [2022-11-20 09:37:53,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381976371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:53,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:53,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:37:53,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548030297] [2022-11-20 09:37:53,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:53,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:37:53,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:37:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:37:53,480 INFO L87 Difference]: Start difference. First operand 13836 states and 67304 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:54,016 INFO L93 Difference]: Finished difference Result 13956 states and 67804 transitions. [2022-11-20 09:37:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 09:37:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:37:54,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:54,074 INFO L225 Difference]: With dead ends: 13956 [2022-11-20 09:37:54,074 INFO L226 Difference]: Without dead ends: 13956 [2022-11-20 09:37:54,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:37:54,074 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:54,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 22 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 55 Unchecked, 0.4s Time] [2022-11-20 09:37:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13956 states. [2022-11-20 09:37:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13956 to 13838. [2022-11-20 09:37:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13838 states, 13833 states have (on average 4.866044964938914) internal successors, (67312), 13837 states have internal predecessors, (67312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13838 states to 13838 states and 67312 transitions. [2022-11-20 09:37:54,432 INFO L78 Accepts]: Start accepts. Automaton has 13838 states and 67312 transitions. Word has length 14 [2022-11-20 09:37:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:54,432 INFO L495 AbstractCegarLoop]: Abstraction has 13838 states and 67312 transitions. [2022-11-20 09:37:54,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:37:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 13838 states and 67312 transitions. [2022-11-20 09:37:54,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:54,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:54,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:54,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:54,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:54,637 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2031818887, now seen corresponding path program 6 times [2022-11-20 09:37:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:54,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715781756] [2022-11-20 09:37:54,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:37:54,637 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 [2022-11-20 09:37:54,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:54,638 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:54,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2022-11-20 09:37:55,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:37:55,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:37:55,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:55,216 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:55,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:55,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:56,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715781756] [2022-11-20 09:37:56,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715781756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:56,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:56,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929282418] [2022-11-20 09:37:56,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:56,303 INFO L87 Difference]: Start difference. First operand 13838 states and 67312 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:56,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:56,599 INFO L93 Difference]: Finished difference Result 14060 states and 68244 transitions. [2022-11-20 09:37:56,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:56,658 INFO L225 Difference]: With dead ends: 14060 [2022-11-20 09:37:56,658 INFO L226 Difference]: Without dead ends: 14060 [2022-11-20 09:37:56,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:56,658 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:56,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-20 09:37:56,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14060 states. [2022-11-20 09:37:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14060 to 13900. [2022-11-20 09:37:57,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13900 states, 13895 states have (on average 4.865203310543361) internal successors, (67602), 13899 states have internal predecessors, (67602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13900 states to 13900 states and 67602 transitions. [2022-11-20 09:37:57,128 INFO L78 Accepts]: Start accepts. Automaton has 13900 states and 67602 transitions. Word has length 14 [2022-11-20 09:37:57,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:57,128 INFO L495 AbstractCegarLoop]: Abstraction has 13900 states and 67602 transitions. [2022-11-20 09:37:57,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:57,128 INFO L276 IsEmpty]: Start isEmpty. Operand 13900 states and 67602 transitions. [2022-11-20 09:37:57,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:57,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:57,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:57,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:57,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:37:57,332 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:37:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2032302487, now seen corresponding path program 7 times [2022-11-20 09:37:57,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:37:57,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882933399] [2022-11-20 09:37:57,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:37:57,333 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 [2022-11-20 09:37:57,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:37:57,334 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:37:57,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-20 09:37:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:57,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:37:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:57,865 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:37:57,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:37:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:58,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:37:58,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:37:58,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882933399] [2022-11-20 09:37:58,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882933399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:58,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:37:58,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:37:58,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297822354] [2022-11-20 09:37:58,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:58,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:37:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:58,859 INFO L87 Difference]: Start difference. First operand 13900 states and 67602 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:37:59,484 INFO L93 Difference]: Finished difference Result 13988 states and 67964 transitions. [2022-11-20 09:37:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:59,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:37:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:37:59,539 INFO L225 Difference]: With dead ends: 13988 [2022-11-20 09:37:59,540 INFO L226 Difference]: Without dead ends: 13988 [2022-11-20 09:37:59,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:37:59,540 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:37:59,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 41 Unchecked, 0.5s Time] [2022-11-20 09:37:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13988 states. [2022-11-20 09:37:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13988 to 13898. [2022-11-20 09:37:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13898 states, 13893 states have (on average 4.865183905563953) internal successors, (67592), 13897 states have internal predecessors, (67592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13898 states to 13898 states and 67592 transitions. [2022-11-20 09:37:59,892 INFO L78 Accepts]: Start accepts. Automaton has 13898 states and 67592 transitions. Word has length 14 [2022-11-20 09:37:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:37:59,892 INFO L495 AbstractCegarLoop]: Abstraction has 13898 states and 67592 transitions. [2022-11-20 09:37:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:37:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13898 states and 67592 transitions. [2022-11-20 09:37:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:37:59,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:37:59,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:59,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Ended with exit code 0 [2022-11-20 09:38:00,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:00,098 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:00,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2032526617, now seen corresponding path program 8 times [2022-11-20 09:38:00,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:00,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905291062] [2022-11-20 09:38:00,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:38:00,099 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 [2022-11-20 09:38:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:00,100 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-20 09:38:00,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:38:00,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:38:00,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:00,680 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:00,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:01,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:01,736 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905291062] [2022-11-20 09:38:01,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905291062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:01,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:01,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:38:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991076034] [2022-11-20 09:38:01,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:01,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:01,737 INFO L87 Difference]: Start difference. First operand 13898 states and 67592 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:02,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:02,374 INFO L93 Difference]: Finished difference Result 14112 states and 68454 transitions. [2022-11-20 09:38:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:38:02,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:02,432 INFO L225 Difference]: With dead ends: 14112 [2022-11-20 09:38:02,432 INFO L226 Difference]: Without dead ends: 14112 [2022-11-20 09:38:02,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:38:02,433 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:02,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 47 Unchecked, 0.5s Time] [2022-11-20 09:38:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14112 states. [2022-11-20 09:38:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14112 to 13878. [2022-11-20 09:38:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13873 states have (on average 4.866287032365026) internal successors, (67510), 13877 states have internal predecessors, (67510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 67510 transitions. [2022-11-20 09:38:02,794 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 67510 transitions. Word has length 14 [2022-11-20 09:38:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:02,794 INFO L495 AbstractCegarLoop]: Abstraction has 13878 states and 67510 transitions. [2022-11-20 09:38:02,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 67510 transitions. [2022-11-20 09:38:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:02,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:02,798 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:02,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Forceful destruction successful, exit code 0 [2022-11-20 09:38:02,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:02,999 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:02,999 INFO L85 PathProgramCache]: Analyzing trace with hash -2102478819, now seen corresponding path program 9 times [2022-11-20 09:38:02,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:02,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235506550] [2022-11-20 09:38:02,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:38:02,999 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 [2022-11-20 09:38:02,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:03,000 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:03,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2022-11-20 09:38:03,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:38:03,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:38:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:03,612 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:03,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:04,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:04,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235506550] [2022-11-20 09:38:04,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235506550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:04,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:04,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:38:04,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591439665] [2022-11-20 09:38:04,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:04,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:04,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:04,705 INFO L87 Difference]: Start difference. First operand 13878 states and 67510 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:05,305 INFO L93 Difference]: Finished difference Result 14102 states and 68554 transitions. [2022-11-20 09:38:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:38:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:05,363 INFO L225 Difference]: With dead ends: 14102 [2022-11-20 09:38:05,363 INFO L226 Difference]: Without dead ends: 14102 [2022-11-20 09:38:05,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:38:05,364 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:05,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-11-20 09:38:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14102 states. [2022-11-20 09:38:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14102 to 13878. [2022-11-20 09:38:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13873 states have (on average 4.866287032365026) internal successors, (67510), 13877 states have internal predecessors, (67510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:05,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 67510 transitions. [2022-11-20 09:38:05,949 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 67510 transitions. Word has length 14 [2022-11-20 09:38:05,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:05,949 INFO L495 AbstractCegarLoop]: Abstraction has 13878 states and 67510 transitions. [2022-11-20 09:38:05,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:05,950 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 67510 transitions. [2022-11-20 09:38:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:05,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:05,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:05,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Forceful destruction successful, exit code 0 [2022-11-20 09:38:06,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:06,154 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2102463009, now seen corresponding path program 10 times [2022-11-20 09:38:06,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:06,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099572590] [2022-11-20 09:38:06,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:38:06,155 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 [2022-11-20 09:38:06,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:06,156 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:06,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2022-11-20 09:38:06,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:38:06,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:06,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:38:06,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:06,716 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:06,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:07,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:07,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:07,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099572590] [2022-11-20 09:38:07,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099572590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:07,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:07,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:38:07,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278856577] [2022-11-20 09:38:07,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:07,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:07,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:07,744 INFO L87 Difference]: Start difference. First operand 13878 states and 67510 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:08,334 INFO L93 Difference]: Finished difference Result 14000 states and 68108 transitions. [2022-11-20 09:38:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:08,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:38:08,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:08,393 INFO L225 Difference]: With dead ends: 14000 [2022-11-20 09:38:08,393 INFO L226 Difference]: Without dead ends: 14000 [2022-11-20 09:38:08,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:38:08,394 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:08,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-11-20 09:38:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14000 states. [2022-11-20 09:38:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14000 to 13878. [2022-11-20 09:38:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13878 states, 13873 states have (on average 4.866287032365026) internal successors, (67510), 13877 states have internal predecessors, (67510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:08,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13878 states to 13878 states and 67510 transitions. [2022-11-20 09:38:08,872 INFO L78 Accepts]: Start accepts. Automaton has 13878 states and 67510 transitions. Word has length 14 [2022-11-20 09:38:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:08,873 INFO L495 AbstractCegarLoop]: Abstraction has 13878 states and 67510 transitions. [2022-11-20 09:38:08,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 13878 states and 67510 transitions. [2022-11-20 09:38:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:08,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:08,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:08,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Forceful destruction successful, exit code 0 [2022-11-20 09:38:09,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:09,093 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:09,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:09,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2102462823, now seen corresponding path program 1 times [2022-11-20 09:38:09,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:09,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949035793] [2022-11-20 09:38:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:09,094 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 [2022-11-20 09:38:09,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:09,095 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:09,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-20 09:38:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:09,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:38:09,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:09,647 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:09,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:10,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:10,730 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:10,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949035793] [2022-11-20 09:38:10,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949035793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:10,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:10,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:38:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200746542] [2022-11-20 09:38:10,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:10,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:10,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:10,731 INFO L87 Difference]: Start difference. First operand 13878 states and 67510 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:11,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:11,380 INFO L93 Difference]: Finished difference Result 13940 states and 67820 transitions. [2022-11-20 09:38:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:38:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:11,439 INFO L225 Difference]: With dead ends: 13940 [2022-11-20 09:38:11,440 INFO L226 Difference]: Without dead ends: 13940 [2022-11-20 09:38:11,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:38:11,440 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:11,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-11-20 09:38:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13940 states. [2022-11-20 09:38:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13940 to 13880. [2022-11-20 09:38:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13880 states, 13875 states have (on average 4.866162162162162) internal successors, (67518), 13879 states have internal predecessors, (67518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13880 states to 13880 states and 67518 transitions. [2022-11-20 09:38:11,806 INFO L78 Accepts]: Start accepts. Automaton has 13880 states and 67518 transitions. Word has length 14 [2022-11-20 09:38:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:11,806 INFO L495 AbstractCegarLoop]: Abstraction has 13880 states and 67518 transitions. [2022-11-20 09:38:11,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 13880 states and 67518 transitions. [2022-11-20 09:38:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:11,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:11,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:11,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Ended with exit code 0 [2022-11-20 09:38:12,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:12,011 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2102473053, now seen corresponding path program 2 times [2022-11-20 09:38:12,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652934900] [2022-11-20 09:38:12,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:38:12,012 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 [2022-11-20 09:38:12,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:12,013 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:12,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2022-11-20 09:38:12,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:38:12,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:38:12,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:12,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:12,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:13,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:13,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:13,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652934900] [2022-11-20 09:38:13,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652934900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:13,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:13,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:38:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210085531] [2022-11-20 09:38:13,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:13,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:13,780 INFO L87 Difference]: Start difference. First operand 13880 states and 67518 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:14,387 INFO L93 Difference]: Finished difference Result 13976 states and 67974 transitions. [2022-11-20 09:38:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:14,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:38:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:14,446 INFO L225 Difference]: With dead ends: 13976 [2022-11-20 09:38:14,446 INFO L226 Difference]: Without dead ends: 13976 [2022-11-20 09:38:14,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:38:14,447 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:14,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-20 09:38:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13976 states. [2022-11-20 09:38:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13976 to 13910. [2022-11-20 09:38:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13910 states, 13905 states have (on average 4.864293419633225) internal successors, (67638), 13909 states have internal predecessors, (67638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13910 states to 13910 states and 67638 transitions. [2022-11-20 09:38:15,016 INFO L78 Accepts]: Start accepts. Automaton has 13910 states and 67638 transitions. Word has length 14 [2022-11-20 09:38:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:15,016 INFO L495 AbstractCegarLoop]: Abstraction has 13910 states and 67638 transitions. [2022-11-20 09:38:15,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 13910 states and 67638 transitions. [2022-11-20 09:38:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:15,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:15,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:15,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Ended with exit code 0 [2022-11-20 09:38:15,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:15,221 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:15,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2097831423, now seen corresponding path program 3 times [2022-11-20 09:38:15,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:15,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037206797] [2022-11-20 09:38:15,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:38:15,222 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 [2022-11-20 09:38:15,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:15,223 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:15,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2022-11-20 09:38:15,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:38:15,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:38:15,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:15,790 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:15,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:38:16,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:38:16,802 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:16,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037206797] [2022-11-20 09:38:16,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037206797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:16,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:16,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:38:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258605334] [2022-11-20 09:38:16,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:16,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:16,803 INFO L87 Difference]: Start difference. First operand 13910 states and 67638 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:17,427 INFO L93 Difference]: Finished difference Result 14032 states and 68196 transitions. [2022-11-20 09:38:17,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:38:17,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:38:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:17,485 INFO L225 Difference]: With dead ends: 14032 [2022-11-20 09:38:17,485 INFO L226 Difference]: Without dead ends: 14032 [2022-11-20 09:38:17,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:38:17,486 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:17,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 23 Unchecked, 0.5s Time] [2022-11-20 09:38:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14032 states. [2022-11-20 09:38:17,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14032 to 13906. [2022-11-20 09:38:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13906 states, 13901 states have (on average 4.864398244730595) internal successors, (67620), 13905 states have internal predecessors, (67620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:17,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13906 states to 13906 states and 67620 transitions. [2022-11-20 09:38:17,852 INFO L78 Accepts]: Start accepts. Automaton has 13906 states and 67620 transitions. Word has length 14 [2022-11-20 09:38:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:17,852 INFO L495 AbstractCegarLoop]: Abstraction has 13906 states and 67620 transitions. [2022-11-20 09:38:17,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:17,853 INFO L276 IsEmpty]: Start isEmpty. Operand 13906 states and 67620 transitions. [2022-11-20 09:38:17,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:17,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:17,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:17,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Ended with exit code 0 [2022-11-20 09:38:18,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:18,057 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1769949487, now seen corresponding path program 11 times [2022-11-20 09:38:18,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:18,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980280935] [2022-11-20 09:38:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:38:18,058 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 [2022-11-20 09:38:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:18,059 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:18,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-20 09:38:18,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:38:18,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:18,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:38:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:18,804 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:18,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:19,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:20,127 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:20,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980280935] [2022-11-20 09:38:20,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980280935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:20,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:20,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:38:20,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976361016] [2022-11-20 09:38:20,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:20,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:38:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:38:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:38:20,128 INFO L87 Difference]: Start difference. First operand 13906 states and 67620 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:38:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:20,801 INFO L93 Difference]: Finished difference Result 13970 states and 67880 transitions. [2022-11-20 09:38:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:20,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-20 09:38:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:20,862 INFO L225 Difference]: With dead ends: 13970 [2022-11-20 09:38:20,862 INFO L226 Difference]: Without dead ends: 13970 [2022-11-20 09:38:20,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:38:20,862 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:20,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2022-11-20 09:38:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13970 states. [2022-11-20 09:38:21,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13970 to 13902. [2022-11-20 09:38:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13902 states, 13897 states have (on average 4.864647046125063) internal successors, (67604), 13901 states have internal predecessors, (67604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 67604 transitions. [2022-11-20 09:38:21,224 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 67604 transitions. Word has length 14 [2022-11-20 09:38:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:21,224 INFO L495 AbstractCegarLoop]: Abstraction has 13902 states and 67604 transitions. [2022-11-20 09:38:21,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-20 09:38:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 67604 transitions. [2022-11-20 09:38:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:21,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:21,229 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:21,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Ended with exit code 0 [2022-11-20 09:38:21,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:21,429 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1790356105, now seen corresponding path program 7 times [2022-11-20 09:38:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966205694] [2022-11-20 09:38:21,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:38:21,430 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 [2022-11-20 09:38:21,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:21,431 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:21,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-20 09:38:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:21,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:38:21,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:22,049 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:22,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:22,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:24,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966205694] [2022-11-20 09:38:24,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966205694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:24,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:24,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:38:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847327655] [2022-11-20 09:38:24,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:38:24,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:38:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:38:24,372 INFO L87 Difference]: Start difference. First operand 13902 states and 67604 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:38:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:28,727 INFO L93 Difference]: Finished difference Result 13924 states and 67706 transitions. [2022-11-20 09:38:28,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:38:28,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 [2022-11-20 09:38:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:28,784 INFO L225 Difference]: With dead ends: 13924 [2022-11-20 09:38:28,785 INFO L226 Difference]: Without dead ends: 13924 [2022-11-20 09:38:28,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:38:28,785 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:28,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 94 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 98 Unchecked, 1.3s Time] [2022-11-20 09:38:28,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13924 states. [2022-11-20 09:38:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13924 to 13908. [2022-11-20 09:38:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13908 states, 13903 states have (on average 4.864705459253399) internal successors, (67634), 13907 states have internal predecessors, (67634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13908 states to 13908 states and 67634 transitions. [2022-11-20 09:38:29,148 INFO L78 Accepts]: Start accepts. Automaton has 13908 states and 67634 transitions. Word has length 14 [2022-11-20 09:38:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:29,148 INFO L495 AbstractCegarLoop]: Abstraction has 13908 states and 67634 transitions. [2022-11-20 09:38:29,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:38:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 13908 states and 67634 transitions. [2022-11-20 09:38:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:29,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:29,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:29,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Ended with exit code 0 [2022-11-20 09:38:29,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:29,352 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1644423667, now seen corresponding path program 12 times [2022-11-20 09:38:29,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:29,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340416771] [2022-11-20 09:38:29,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:38:29,353 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 [2022-11-20 09:38:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:29,354 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:29,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2022-11-20 09:38:29,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:38:29,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:29,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:38:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:29,931 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:29,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:30,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:38:31,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:31,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340416771] [2022-11-20 09:38:31,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340416771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:31,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:31,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:38:31,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288212044] [2022-11-20 09:38:31,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:31,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:31,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:31,028 INFO L87 Difference]: Start difference. First operand 13908 states and 67634 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:31,568 INFO L93 Difference]: Finished difference Result 14106 states and 68474 transitions. [2022-11-20 09:38:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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 [2022-11-20 09:38:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:31,630 INFO L225 Difference]: With dead ends: 14106 [2022-11-20 09:38:31,630 INFO L226 Difference]: Without dead ends: 14106 [2022-11-20 09:38:31,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:38:31,631 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:31,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-20 09:38:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14106 states. [2022-11-20 09:38:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14106 to 13942. [2022-11-20 09:38:32,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13942 states, 13937 states have (on average 4.86360048790988) internal successors, (67784), 13941 states have internal predecessors, (67784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13942 states to 13942 states and 67784 transitions. [2022-11-20 09:38:32,087 INFO L78 Accepts]: Start accepts. Automaton has 13942 states and 67784 transitions. Word has length 14 [2022-11-20 09:38:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:32,088 INFO L495 AbstractCegarLoop]: Abstraction has 13942 states and 67784 transitions. [2022-11-20 09:38:32,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 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) [2022-11-20 09:38:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 13942 states and 67784 transitions. [2022-11-20 09:38:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 09:38:32,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:32,092 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:32,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Ended with exit code 0 [2022-11-20 09:38:32,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:32,293 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1271466917, now seen corresponding path program 8 times [2022-11-20 09:38:32,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:32,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119898833] [2022-11-20 09:38:32,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:38:32,294 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 [2022-11-20 09:38:32,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:32,295 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:32,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-20 09:38:32,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:38:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:38:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:32,976 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:32,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:35,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:35,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119898833] [2022-11-20 09:38:35,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119898833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:35,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:35,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:38:35,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305685267] [2022-11-20 09:38:35,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:35,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:38:35,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:35,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:38:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:38:35,141 INFO L87 Difference]: Start difference. First operand 13942 states and 67784 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:38:39,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:39,683 INFO L93 Difference]: Finished difference Result 14200 states and 68840 transitions. [2022-11-20 09:38:39,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 09:38:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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 [2022-11-20 09:38:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:39,739 INFO L225 Difference]: With dead ends: 14200 [2022-11-20 09:38:39,740 INFO L226 Difference]: Without dead ends: 14200 [2022-11-20 09:38:39,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:38:39,740 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:39,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 89 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 229 Unchecked, 2.2s Time] [2022-11-20 09:38:39,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14200 states. [2022-11-20 09:38:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14200 to 14139. [2022-11-20 09:38:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14139 states, 14134 states have (on average 4.85651620206594) internal successors, (68642), 14138 states have internal predecessors, (68642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14139 states to 14139 states and 68642 transitions. [2022-11-20 09:38:40,079 INFO L78 Accepts]: Start accepts. Automaton has 14139 states and 68642 transitions. Word has length 14 [2022-11-20 09:38:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:40,079 INFO L495 AbstractCegarLoop]: Abstraction has 14139 states and 68642 transitions. [2022-11-20 09:38:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 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) [2022-11-20 09:38:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 14139 states and 68642 transitions. [2022-11-20 09:38:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:38:40,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:40,084 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:40,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Ended with exit code 0 [2022-11-20 09:38:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:40,286 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1478584127, now seen corresponding path program 8 times [2022-11-20 09:38:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:40,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272543222] [2022-11-20 09:38:40,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:38:40,287 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:40,289 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:40,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2022-11-20 09:38:40,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:38:40,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:40,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:38:40,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:40,953 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:40,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:41,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:43,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:43,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272543222] [2022-11-20 09:38:43,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272543222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:43,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:43,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:38:43,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985252144] [2022-11-20 09:38:43,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:43,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:38:43,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:38:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:38:43,476 INFO L87 Difference]: Start difference. First operand 14139 states and 68642 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:38:51,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:38:51,922 INFO L93 Difference]: Finished difference Result 15508 states and 74665 transitions. [2022-11-20 09:38:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:38:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2022-11-20 09:38:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:38:51,987 INFO L225 Difference]: With dead ends: 15508 [2022-11-20 09:38:51,987 INFO L226 Difference]: Without dead ends: 15508 [2022-11-20 09:38:51,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-20 09:38:51,988 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 237 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:38:51,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 105 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 636 Invalid, 0 Unknown, 189 Unchecked, 5.6s Time] [2022-11-20 09:38:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15508 states. [2022-11-20 09:38:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15508 to 14272. [2022-11-20 09:38:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14272 states, 14267 states have (on average 4.854559472909512) internal successors, (69260), 14271 states have internal predecessors, (69260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:52,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14272 states to 14272 states and 69260 transitions. [2022-11-20 09:38:52,374 INFO L78 Accepts]: Start accepts. Automaton has 14272 states and 69260 transitions. Word has length 15 [2022-11-20 09:38:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:38:52,374 INFO L495 AbstractCegarLoop]: Abstraction has 14272 states and 69260 transitions. [2022-11-20 09:38:52,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:38:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 14272 states and 69260 transitions. [2022-11-20 09:38:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:38:52,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:38:52,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:52,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Forceful destruction successful, exit code 0 [2022-11-20 09:38:52,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:38:52,581 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:38:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1478584406, now seen corresponding path program 9 times [2022-11-20 09:38:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:38:52,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396293206] [2022-11-20 09:38:52,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:38:52,582 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 [2022-11-20 09:38:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:38:52,583 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:38:52,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-20 09:38:53,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:38:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:38:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:38:53,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:53,335 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:38:53,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:38:53,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:38:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:53,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:54,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:38:54,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:38:54,303 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:38:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:56,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:38:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396293206] [2022-11-20 09:38:56,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396293206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:56,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:38:56,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:38:56,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563509280] [2022-11-20 09:38:56,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:56,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:38:56,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:38:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:38:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:38:56,490 INFO L87 Difference]: Start difference. First operand 14272 states and 69260 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:02,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:02,303 INFO L93 Difference]: Finished difference Result 17441 states and 84455 transitions. [2022-11-20 09:39:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 09:39:02,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:39:02,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:02,524 INFO L225 Difference]: With dead ends: 17441 [2022-11-20 09:39:02,524 INFO L226 Difference]: Without dead ends: 17441 [2022-11-20 09:39:02,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-11-20 09:39:02,524 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 228 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:02,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 82 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 314 Unchecked, 0.6s Time] [2022-11-20 09:39:02,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17441 states. [2022-11-20 09:39:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17441 to 14286. [2022-11-20 09:39:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14286 states, 14281 states have (on average 4.854351936138926) internal successors, (69325), 14285 states have internal predecessors, (69325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:02,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14286 states to 14286 states and 69325 transitions. [2022-11-20 09:39:02,946 INFO L78 Accepts]: Start accepts. Automaton has 14286 states and 69325 transitions. Word has length 15 [2022-11-20 09:39:02,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:02,946 INFO L495 AbstractCegarLoop]: Abstraction has 14286 states and 69325 transitions. [2022-11-20 09:39:02,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 14286 states and 69325 transitions. [2022-11-20 09:39:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:02,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:02,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:02,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Ended with exit code 0 [2022-11-20 09:39:03,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:03,156 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1478592776, now seen corresponding path program 10 times [2022-11-20 09:39:03,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:03,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436573128] [2022-11-20 09:39:03,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:39:03,158 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 [2022-11-20 09:39:03,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:03,159 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:03,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-20 09:39:03,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:39:03,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:03,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:39:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:03,800 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:03,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:04,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:05,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:05,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436573128] [2022-11-20 09:39:05,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436573128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:05,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:05,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:39:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622916965] [2022-11-20 09:39:05,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:05,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:39:05,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:39:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:39:05,942 INFO L87 Difference]: Start difference. First operand 14286 states and 69325 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:07,873 INFO L93 Difference]: Finished difference Result 15131 states and 73257 transitions. [2022-11-20 09:39:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:39:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:39:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:07,935 INFO L225 Difference]: With dead ends: 15131 [2022-11-20 09:39:07,935 INFO L226 Difference]: Without dead ends: 15131 [2022-11-20 09:39:07,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:39:07,935 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 152 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:07,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 56 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 157 Unchecked, 0.6s Time] [2022-11-20 09:39:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15131 states. [2022-11-20 09:39:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15131 to 14473. [2022-11-20 09:39:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14473 states, 14468 states have (on average 4.854713851257949) internal successors, (70238), 14472 states have internal predecessors, (70238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14473 states to 14473 states and 70238 transitions. [2022-11-20 09:39:08,328 INFO L78 Accepts]: Start accepts. Automaton has 14473 states and 70238 transitions. Word has length 15 [2022-11-20 09:39:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:08,328 INFO L495 AbstractCegarLoop]: Abstraction has 14473 states and 70238 transitions. [2022-11-20 09:39:08,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 14473 states and 70238 transitions. [2022-11-20 09:39:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:08,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:08,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:08,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:08,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:08,536 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1478852246, now seen corresponding path program 11 times [2022-11-20 09:39:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:08,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414834038] [2022-11-20 09:39:08,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:39:08,537 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:08,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:08,538 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:08,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-20 09:39:09,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:39:09,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:39:09,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:09,240 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:09,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:09,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:39:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:39:09,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:10,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:39:10,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:39:10,131 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:39:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:39:12,005 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:12,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414834038] [2022-11-20 09:39:12,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414834038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:12,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:12,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 09:39:12,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970904472] [2022-11-20 09:39:12,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:12,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:39:12,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:12,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:39:12,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:39:12,006 INFO L87 Difference]: Start difference. First operand 14473 states and 70238 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-20 09:39:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:14,230 INFO L93 Difference]: Finished difference Result 15423 states and 74312 transitions. [2022-11-20 09:39:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:39:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 [2022-11-20 09:39:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:14,300 INFO L225 Difference]: With dead ends: 15423 [2022-11-20 09:39:14,300 INFO L226 Difference]: Without dead ends: 15423 [2022-11-20 09:39:14,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:39:14,301 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:14,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 38 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 58 Unchecked, 1.1s Time] [2022-11-20 09:39:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15423 states. [2022-11-20 09:39:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15423 to 14568. [2022-11-20 09:39:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14568 states, 14563 states have (on average 4.855386939504223) internal successors, (70709), 14567 states have internal predecessors, (70709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14568 states to 14568 states and 70709 transitions. [2022-11-20 09:39:14,701 INFO L78 Accepts]: Start accepts. Automaton has 14568 states and 70709 transitions. Word has length 15 [2022-11-20 09:39:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:14,701 INFO L495 AbstractCegarLoop]: Abstraction has 14568 states and 70709 transitions. [2022-11-20 09:39:14,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-20 09:39:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 14568 states and 70709 transitions. [2022-11-20 09:39:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:14,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:14,708 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:14,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Ended with exit code 0 [2022-11-20 09:39:14,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:14,908 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 620304243, now seen corresponding path program 12 times [2022-11-20 09:39:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:14,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559878071] [2022-11-20 09:39:14,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:39:14,909 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 [2022-11-20 09:39:14,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:14,910 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:14,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-20 09:39:15,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 09:39:15,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:15,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:39:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:15,614 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:15,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:18,242 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559878071] [2022-11-20 09:39:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559878071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:18,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:18,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:39:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893527910] [2022-11-20 09:39:18,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:39:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:39:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:39:18,243 INFO L87 Difference]: Start difference. First operand 14568 states and 70709 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:39:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:20,610 INFO L93 Difference]: Finished difference Result 18471 states and 89973 transitions. [2022-11-20 09:39:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:39:20,611 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2022-11-20 09:39:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:20,689 INFO L225 Difference]: With dead ends: 18471 [2022-11-20 09:39:20,689 INFO L226 Difference]: Without dead ends: 18471 [2022-11-20 09:39:20,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:39:20,690 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 215 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:20,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 104 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 336 Unchecked, 0.5s Time] [2022-11-20 09:39:20,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18471 states. [2022-11-20 09:39:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18471 to 17022. [2022-11-20 09:39:21,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17022 states, 17017 states have (on average 4.897925603807956) internal successors, (83348), 17021 states have internal predecessors, (83348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17022 states to 17022 states and 83348 transitions. [2022-11-20 09:39:21,283 INFO L78 Accepts]: Start accepts. Automaton has 17022 states and 83348 transitions. Word has length 15 [2022-11-20 09:39:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:21,283 INFO L495 AbstractCegarLoop]: Abstraction has 17022 states and 83348 transitions. [2022-11-20 09:39:21,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:39:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 17022 states and 83348 transitions. [2022-11-20 09:39:21,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:21,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:21,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:21,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Ended with exit code 0 [2022-11-20 09:39:21,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:21,491 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:21,491 INFO L85 PathProgramCache]: Analyzing trace with hash 620304522, now seen corresponding path program 13 times [2022-11-20 09:39:21,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:21,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071664507] [2022-11-20 09:39:21,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:39:21,492 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 [2022-11-20 09:39:21,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:21,492 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:21,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-20 09:39:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:39:21,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:39:21,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:22,093 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:22,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:22,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:24,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071664507] [2022-11-20 09:39:24,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071664507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:24,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:24,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:39:24,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885098314] [2022-11-20 09:39:24,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:24,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:39:24,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:39:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:39:24,210 INFO L87 Difference]: Start difference. First operand 17022 states and 83348 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:29,137 INFO L93 Difference]: Finished difference Result 19468 states and 94820 transitions. [2022-11-20 09:39:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:39:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:39:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:29,227 INFO L225 Difference]: With dead ends: 19468 [2022-11-20 09:39:29,227 INFO L226 Difference]: Without dead ends: 19468 [2022-11-20 09:39:29,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:39:29,228 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 241 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:29,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 76 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 408 Invalid, 0 Unknown, 311 Unchecked, 2.9s Time] [2022-11-20 09:39:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19468 states. [2022-11-20 09:39:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19468 to 17960. [2022-11-20 09:39:29,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17960 states, 17955 states have (on average 4.901086048454469) internal successors, (87999), 17959 states have internal predecessors, (87999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17960 states to 17960 states and 87999 transitions. [2022-11-20 09:39:29,793 INFO L78 Accepts]: Start accepts. Automaton has 17960 states and 87999 transitions. Word has length 15 [2022-11-20 09:39:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:29,793 INFO L495 AbstractCegarLoop]: Abstraction has 17960 states and 87999 transitions. [2022-11-20 09:39:29,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17960 states and 87999 transitions. [2022-11-20 09:39:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:29,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:29,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:29,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:30,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:30,001 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:30,001 INFO L85 PathProgramCache]: Analyzing trace with hash 620572362, now seen corresponding path program 14 times [2022-11-20 09:39:30,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:30,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328270136] [2022-11-20 09:39:30,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:39:30,002 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 [2022-11-20 09:39:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:30,003 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:30,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-20 09:39:30,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:39:30,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:30,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:39:30,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:30,651 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:30,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:31,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:32,833 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:32,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328270136] [2022-11-20 09:39:32,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328270136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:32,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:32,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:39:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663023098] [2022-11-20 09:39:32,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:39:32,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:39:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:39:32,835 INFO L87 Difference]: Start difference. First operand 17960 states and 87999 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:38,070 INFO L93 Difference]: Finished difference Result 19089 states and 92834 transitions. [2022-11-20 09:39:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:39:38,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:39:38,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:38,148 INFO L225 Difference]: With dead ends: 19089 [2022-11-20 09:39:38,148 INFO L226 Difference]: Without dead ends: 19089 [2022-11-20 09:39:38,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:39:38,149 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:38,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 77 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 154 Unchecked, 2.6s Time] [2022-11-20 09:39:38,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19089 states. [2022-11-20 09:39:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19089 to 18066. [2022-11-20 09:39:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18066 states, 18061 states have (on average 4.901998781905764) internal successors, (88535), 18065 states have internal predecessors, (88535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18066 states to 18066 states and 88535 transitions. [2022-11-20 09:39:38,684 INFO L78 Accepts]: Start accepts. Automaton has 18066 states and 88535 transitions. Word has length 15 [2022-11-20 09:39:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:38,685 INFO L495 AbstractCegarLoop]: Abstraction has 18066 states and 88535 transitions. [2022-11-20 09:39:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 18066 states and 88535 transitions. [2022-11-20 09:39:38,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:38,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:38,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:38,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Ended with exit code 0 [2022-11-20 09:39:38,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:38,893 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash 607792302, now seen corresponding path program 15 times [2022-11-20 09:39:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:38,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311288265] [2022-11-20 09:39:38,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:39:38,893 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 [2022-11-20 09:39:38,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:38,895 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:38,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-20 09:39:39,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:39:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:39,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:39:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:39,669 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:39,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:40,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:39:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:40,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:39:40,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:39:40,639 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:39:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:42,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:42,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311288265] [2022-11-20 09:39:42,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311288265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:42,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:42,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:39:42,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523201757] [2022-11-20 09:39:42,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:42,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:39:42,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:42,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:39:42,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:39:42,825 INFO L87 Difference]: Start difference. First operand 18066 states and 88535 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:46,770 INFO L93 Difference]: Finished difference Result 18243 states and 89187 transitions. [2022-11-20 09:39:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:39:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:39:46,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:46,853 INFO L225 Difference]: With dead ends: 18243 [2022-11-20 09:39:46,853 INFO L226 Difference]: Without dead ends: 18243 [2022-11-20 09:39:46,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2022-11-20 09:39:46,854 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:46,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 72 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 188 Unchecked, 0.9s Time] [2022-11-20 09:39:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18243 states. [2022-11-20 09:39:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18243 to 18067. [2022-11-20 09:39:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18067 states, 18062 states have (on average 4.9019488428745435) internal successors, (88539), 18066 states have internal predecessors, (88539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18067 states to 18067 states and 88539 transitions. [2022-11-20 09:39:47,365 INFO L78 Accepts]: Start accepts. Automaton has 18067 states and 88539 transitions. Word has length 15 [2022-11-20 09:39:47,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:47,365 INFO L495 AbstractCegarLoop]: Abstraction has 18067 states and 88539 transitions. [2022-11-20 09:39:47,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:47,365 INFO L276 IsEmpty]: Start isEmpty. Operand 18067 states and 88539 transitions. [2022-11-20 09:39:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:47,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:47,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:47,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Ended with exit code 0 [2022-11-20 09:39:47,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:47,573 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash 607800672, now seen corresponding path program 16 times [2022-11-20 09:39:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:47,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454467395] [2022-11-20 09:39:47,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:39:47,573 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 [2022-11-20 09:39:47,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:47,574 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-20 09:39:48,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:39:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:48,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:39:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:48,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:48,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:48,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:39:50,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:39:50,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454467395] [2022-11-20 09:39:50,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454467395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:39:50,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:39:50,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:39:50,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262524566] [2022-11-20 09:39:50,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:39:50,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:39:50,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:39:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:39:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:39:50,513 INFO L87 Difference]: Start difference. First operand 18067 states and 88539 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:39:56,948 INFO L93 Difference]: Finished difference Result 25864 states and 127056 transitions. [2022-11-20 09:39:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:39:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:39:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:39:57,066 INFO L225 Difference]: With dead ends: 25864 [2022-11-20 09:39:57,066 INFO L226 Difference]: Without dead ends: 25864 [2022-11-20 09:39:57,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:39:57,067 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:39:57,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 483 Invalid, 0 Unknown, 268 Unchecked, 4.0s Time] [2022-11-20 09:39:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25864 states. [2022-11-20 09:39:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25864 to 19250. [2022-11-20 09:39:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19250 states, 19245 states have (on average 4.931774486879709) internal successors, (94912), 19249 states have internal predecessors, (94912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:39:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19250 states to 19250 states and 94912 transitions. [2022-11-20 09:39:57,665 INFO L78 Accepts]: Start accepts. Automaton has 19250 states and 94912 transitions. Word has length 15 [2022-11-20 09:39:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:39:57,665 INFO L495 AbstractCegarLoop]: Abstraction has 19250 states and 94912 transitions. [2022-11-20 09:39:57,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:39:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 19250 states and 94912 transitions. [2022-11-20 09:39:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:39:57,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:39:57,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:39:57,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Forceful destruction successful, exit code 0 [2022-11-20 09:39:57,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:39:57,873 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:39:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:39:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash 615700092, now seen corresponding path program 17 times [2022-11-20 09:39:57,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:39:57,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775169041] [2022-11-20 09:39:57,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:39:57,875 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 [2022-11-20 09:39:57,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:39:57,876 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:39:57,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-20 09:39:58,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:39:58,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:39:58,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:39:58,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:39:58,665 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:39:58,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:39:59,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:39:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:39:59,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:39:59,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:39:59,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:39:59,624 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:40:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:40:01,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:01,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775169041] [2022-11-20 09:40:01,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775169041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:01,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:01,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 09:40:01,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990112484] [2022-11-20 09:40:01,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:01,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:40:01,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:40:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:40:01,485 INFO L87 Difference]: Start difference. First operand 19250 states and 94912 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-20 09:40:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:04,441 INFO L93 Difference]: Finished difference Result 27390 states and 136941 transitions. [2022-11-20 09:40:04,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:40:04,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 [2022-11-20 09:40:04,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:04,571 INFO L225 Difference]: With dead ends: 27390 [2022-11-20 09:40:04,571 INFO L226 Difference]: Without dead ends: 27390 [2022-11-20 09:40:04,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:40:04,571 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:04,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 44 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 143 Unchecked, 1.7s Time] [2022-11-20 09:40:04,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27390 states. [2022-11-20 09:40:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27390 to 20122. [2022-11-20 09:40:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20122 states, 20117 states have (on average 4.955609683352389) internal successors, (99692), 20121 states have internal predecessors, (99692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20122 states to 20122 states and 99692 transitions. [2022-11-20 09:40:05,687 INFO L78 Accepts]: Start accepts. Automaton has 20122 states and 99692 transitions. Word has length 15 [2022-11-20 09:40:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:05,687 INFO L495 AbstractCegarLoop]: Abstraction has 20122 states and 99692 transitions. [2022-11-20 09:40:05,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-20 09:40:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20122 states and 99692 transitions. [2022-11-20 09:40:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:40:05,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:05,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:05,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:05,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:05,896 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:40:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash -499969900, now seen corresponding path program 10 times [2022-11-20 09:40:05,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:05,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251627501] [2022-11-20 09:40:05,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:40:05,898 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 [2022-11-20 09:40:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:05,899 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:40:05,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-20 09:40:06,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:40:06,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:06,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:40:06,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:06,588 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:06,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:07,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:07,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:08,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:08,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251627501] [2022-11-20 09:40:08,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251627501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:08,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:08,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:40:08,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517102438] [2022-11-20 09:40:08,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:08,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:40:08,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:08,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:40:08,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:40:08,936 INFO L87 Difference]: Start difference. First operand 20122 states and 99692 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:40:14,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:14,781 INFO L93 Difference]: Finished difference Result 22775 states and 111328 transitions. [2022-11-20 09:40:14,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:40:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:40:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:14,897 INFO L225 Difference]: With dead ends: 22775 [2022-11-20 09:40:14,897 INFO L226 Difference]: Without dead ends: 22775 [2022-11-20 09:40:14,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:40:14,898 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 176 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:14,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 74 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 423 Invalid, 0 Unknown, 204 Unchecked, 3.4s Time] [2022-11-20 09:40:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22775 states. [2022-11-20 09:40:15,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22775 to 20284. [2022-11-20 09:40:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20284 states, 20279 states have (on average 4.95561911336851) internal successors, (100495), 20283 states have internal predecessors, (100495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20284 states to 20284 states and 100495 transitions. [2022-11-20 09:40:15,769 INFO L78 Accepts]: Start accepts. Automaton has 20284 states and 100495 transitions. Word has length 15 [2022-11-20 09:40:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:15,769 INFO L495 AbstractCegarLoop]: Abstraction has 20284 states and 100495 transitions. [2022-11-20 09:40:15,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:40:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 20284 states and 100495 transitions. [2022-11-20 09:40:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:40:15,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:15,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:15,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:15,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:15,978 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:40:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -491524632, now seen corresponding path program 18 times [2022-11-20 09:40:15,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:15,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470963960] [2022-11-20 09:40:15,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:40:15,979 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 [2022-11-20 09:40:15,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:15,980 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:40:15,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-20 09:40:16,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 09:40:16,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:16,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:40:16,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:16,849 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:16,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:17,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:19,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:19,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470963960] [2022-11-20 09:40:19,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470963960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:19,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:19,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-20 09:40:19,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430008903] [2022-11-20 09:40:19,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:19,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 09:40:19,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:19,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 09:40:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:40:19,068 INFO L87 Difference]: Start difference. First operand 20284 states and 100495 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:40:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:25,204 INFO L93 Difference]: Finished difference Result 28472 states and 139416 transitions. [2022-11-20 09:40:25,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:40:25,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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 [2022-11-20 09:40:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:25,483 INFO L225 Difference]: With dead ends: 28472 [2022-11-20 09:40:25,483 INFO L226 Difference]: Without dead ends: 28472 [2022-11-20 09:40:25,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2022-11-20 09:40:25,484 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 210 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:25,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 85 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 459 Invalid, 0 Unknown, 355 Unchecked, 3.5s Time] [2022-11-20 09:40:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28472 states. [2022-11-20 09:40:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28472 to 20852. [2022-11-20 09:40:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20852 states, 20847 states have (on average 4.966469995682832) internal successors, (103536), 20851 states have internal predecessors, (103536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:26,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20852 states to 20852 states and 103536 transitions. [2022-11-20 09:40:26,585 INFO L78 Accepts]: Start accepts. Automaton has 20852 states and 103536 transitions. Word has length 15 [2022-11-20 09:40:26,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:26,585 INFO L495 AbstractCegarLoop]: Abstraction has 20852 states and 103536 transitions. [2022-11-20 09:40:26,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 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) [2022-11-20 09:40:26,585 INFO L276 IsEmpty]: Start isEmpty. Operand 20852 states and 103536 transitions. [2022-11-20 09:40:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:40:26,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:26,597 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:26,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:26,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:26,797 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:40:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:26,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1779335262, now seen corresponding path program 6 times [2022-11-20 09:40:26,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:26,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804645638] [2022-11-20 09:40:26,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:40:26,798 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 [2022-11-20 09:40:26,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:26,799 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:40:26,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-20 09:40:27,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 09:40:27,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:40:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:27,548 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:27,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:28,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:30,246 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:30,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804645638] [2022-11-20 09:40:30,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804645638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:30,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:30,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:40:30,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487458942] [2022-11-20 09:40:30,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:30,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:40:30,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:30,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:40:30,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:40:30,247 INFO L87 Difference]: Start difference. First operand 20852 states and 103536 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:40:39,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:39,629 INFO L93 Difference]: Finished difference Result 22166 states and 109149 transitions. [2022-11-20 09:40:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:40:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2022-11-20 09:40:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:39,728 INFO L225 Difference]: With dead ends: 22166 [2022-11-20 09:40:39,728 INFO L226 Difference]: Without dead ends: 22166 [2022-11-20 09:40:39,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:40:39,728 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 277 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:39,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 110 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 652 Invalid, 0 Unknown, 256 Unchecked, 6.1s Time] [2022-11-20 09:40:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22166 states. [2022-11-20 09:40:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22166 to 20874. [2022-11-20 09:40:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20874 states, 20869 states have (on average 4.965930327279697) internal successors, (103634), 20873 states have internal predecessors, (103634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20874 states to 20874 states and 103634 transitions. [2022-11-20 09:40:40,634 INFO L78 Accepts]: Start accepts. Automaton has 20874 states and 103634 transitions. Word has length 15 [2022-11-20 09:40:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:40,634 INFO L495 AbstractCegarLoop]: Abstraction has 20874 states and 103634 transitions. [2022-11-20 09:40:40,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:40:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 20874 states and 103634 transitions. [2022-11-20 09:40:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:40:40,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:40,646 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:40,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Ended with exit code 0 [2022-11-20 09:40:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:40,846 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:40:40,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1521078257, now seen corresponding path program 4 times [2022-11-20 09:40:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:40,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594958754] [2022-11-20 09:40:40,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:40:40,847 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 [2022-11-20 09:40:40,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:40,849 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:40:40,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-20 09:40:41,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:40:41,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:41,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 09:40:41,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:41,572 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:41,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:42,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:40:44,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594958754] [2022-11-20 09:40:44,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594958754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:44,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:44,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:40:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789269766] [2022-11-20 09:40:44,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:44,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:40:44,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:40:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:40:44,300 INFO L87 Difference]: Start difference. First operand 20874 states and 103634 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:40:47,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:47,064 INFO L93 Difference]: Finished difference Result 21048 states and 104327 transitions. [2022-11-20 09:40:47,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 09:40:47,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2022-11-20 09:40:47,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:47,162 INFO L225 Difference]: With dead ends: 21048 [2022-11-20 09:40:47,162 INFO L226 Difference]: Without dead ends: 21048 [2022-11-20 09:40:47,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-11-20 09:40:47,163 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:47,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 97 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 202 Unchecked, 0.8s Time] [2022-11-20 09:40:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21048 states. [2022-11-20 09:40:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21048 to 20900. [2022-11-20 09:40:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20900 states, 20895 states have (on average 4.96597272074659) internal successors, (103764), 20899 states have internal predecessors, (103764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20900 states to 20900 states and 103764 transitions. [2022-11-20 09:40:48,216 INFO L78 Accepts]: Start accepts. Automaton has 20900 states and 103764 transitions. Word has length 15 [2022-11-20 09:40:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:48,216 INFO L495 AbstractCegarLoop]: Abstraction has 20900 states and 103764 transitions. [2022-11-20 09:40:48,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:40:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 20900 states and 103764 transitions. [2022-11-20 09:40:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:40:48,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:48,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:48,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Ended with exit code 0 [2022-11-20 09:40:48,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:48,426 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:40:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1521078040, now seen corresponding path program 5 times [2022-11-20 09:40:48,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:48,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655473584] [2022-11-20 09:40:48,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:40:48,427 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 [2022-11-20 09:40:48,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:48,428 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:40:48,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-20 09:40:48,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:40:48,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:40:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:40:48,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:49,146 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:49,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:49,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 09:40:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:40:49,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:50,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-20 09:40:50,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-20 09:40:50,107 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 09:40:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:40:52,188 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:52,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655473584] [2022-11-20 09:40:52,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655473584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:52,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:52,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-20 09:40:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056813948] [2022-11-20 09:40:52,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:40:52,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:52,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:40:52,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:40:52,190 INFO L87 Difference]: Start difference. First operand 20900 states and 103764 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-20 09:40:54,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:54,096 INFO L93 Difference]: Finished difference Result 21287 states and 105106 transitions. [2022-11-20 09:40:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:40:54,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 [2022-11-20 09:40:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:54,212 INFO L225 Difference]: With dead ends: 21287 [2022-11-20 09:40:54,213 INFO L226 Difference]: Without dead ends: 21287 [2022-11-20 09:40:54,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:40:54,213 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:54,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 46 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 47 Unchecked, 1.1s Time] [2022-11-20 09:40:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21287 states. [2022-11-20 09:40:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21287 to 20946. [2022-11-20 09:40:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20946 states, 20941 states have (on average 4.967289050188625) internal successors, (104020), 20945 states have internal predecessors, (104020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20946 states to 20946 states and 104020 transitions. [2022-11-20 09:40:55,249 INFO L78 Accepts]: Start accepts. Automaton has 20946 states and 104020 transitions. Word has length 15 [2022-11-20 09:40:55,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:55,250 INFO L495 AbstractCegarLoop]: Abstraction has 20946 states and 104020 transitions. [2022-11-20 09:40:55,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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) [2022-11-20 09:40:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 20946 states and 104020 transitions. [2022-11-20 09:40:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:40:55,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:55,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:55,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:55,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:55,474 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:40:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:55,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1803073779, now seen corresponding path program 1 times [2022-11-20 09:40:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:55,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433992435] [2022-11-20 09:40:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:40:55,475 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 [2022-11-20 09:40:55,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:55,477 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:40:55,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-20 09:40:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:40:55,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:40:55,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:40:56,155 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:40:56,156 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:40:56,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:40:56,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:40:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:40:57,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:40:57,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433992435] [2022-11-20 09:40:57,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433992435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:40:57,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:40:57,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:40:57,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987067673] [2022-11-20 09:40:57,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:40:57,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:40:57,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:40:57,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:40:57,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:40:57,312 INFO L87 Difference]: Start difference. First operand 20946 states and 104020 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:40:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:40:58,410 INFO L93 Difference]: Finished difference Result 21935 states and 108539 transitions. [2022-11-20 09:40:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:40:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:40:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:40:58,509 INFO L225 Difference]: With dead ends: 21935 [2022-11-20 09:40:58,509 INFO L226 Difference]: Without dead ends: 21935 [2022-11-20 09:40:58,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:40:58,510 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:40:58,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 133 Unchecked, 0.9s Time] [2022-11-20 09:40:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21935 states. [2022-11-20 09:40:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21935 to 20941. [2022-11-20 09:40:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20941 states, 20936 states have (on average 4.967615590370653) internal successors, (104002), 20940 states have internal predecessors, (104002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:40:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20941 states to 20941 states and 104002 transitions. [2022-11-20 09:40:59,376 INFO L78 Accepts]: Start accepts. Automaton has 20941 states and 104002 transitions. Word has length 15 [2022-11-20 09:40:59,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:40:59,376 INFO L495 AbstractCegarLoop]: Abstraction has 20941 states and 104002 transitions. [2022-11-20 09:40:59,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:40:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 20941 states and 104002 transitions. [2022-11-20 09:40:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:40:59,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:40:59,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:40:59,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Forceful destruction successful, exit code 0 [2022-11-20 09:40:59,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:40:59,588 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:40:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:40:59,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1769127849, now seen corresponding path program 2 times [2022-11-20 09:40:59,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:40:59,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746990451] [2022-11-20 09:40:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:40:59,589 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 [2022-11-20 09:40:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:40:59,591 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:40:59,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-20 09:41:00,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:41:00,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:00,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:00,340 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:00,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:00,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:01,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:01,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746990451] [2022-11-20 09:41:01,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746990451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:01,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:01,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:01,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373050749] [2022-11-20 09:41:01,783 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:01,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:01,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:01,784 INFO L87 Difference]: Start difference. First operand 20941 states and 104002 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:02,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:02,403 INFO L93 Difference]: Finished difference Result 21408 states and 106195 transitions. [2022-11-20 09:41:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:41:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:02,500 INFO L225 Difference]: With dead ends: 21408 [2022-11-20 09:41:02,500 INFO L226 Difference]: Without dead ends: 21408 [2022-11-20 09:41:02,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:02,501 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:02,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-20 09:41:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21408 states. [2022-11-20 09:41:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21408 to 20953. [2022-11-20 09:41:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20953 states, 20948 states have (on average 4.967443192667558) internal successors, (104058), 20952 states have internal predecessors, (104058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:03,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20953 states to 20953 states and 104058 transitions. [2022-11-20 09:41:03,303 INFO L78 Accepts]: Start accepts. Automaton has 20953 states and 104058 transitions. Word has length 15 [2022-11-20 09:41:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:03,304 INFO L495 AbstractCegarLoop]: Abstraction has 20953 states and 104058 transitions. [2022-11-20 09:41:03,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20953 states and 104058 transitions. [2022-11-20 09:41:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:03,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:03,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:03,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Ended with exit code 0 [2022-11-20 09:41:03,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:03,512 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:03,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1773328380, now seen corresponding path program 1 times [2022-11-20 09:41:03,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:03,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244259539] [2022-11-20 09:41:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:41:03,513 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 [2022-11-20 09:41:03,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:03,517 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:03,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-20 09:41:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:04,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:04,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:04,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:04,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:05,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:05,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244259539] [2022-11-20 09:41:05,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244259539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:05,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:05,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:05,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27698856] [2022-11-20 09:41:05,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:05,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:05,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:05,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:05,509 INFO L87 Difference]: Start difference. First operand 20953 states and 104058 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:06,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:06,182 INFO L93 Difference]: Finished difference Result 21424 states and 106572 transitions. [2022-11-20 09:41:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:41:06,183 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:06,281 INFO L225 Difference]: With dead ends: 21424 [2022-11-20 09:41:06,281 INFO L226 Difference]: Without dead ends: 21424 [2022-11-20 09:41:06,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:06,281 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:06,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-20 09:41:06,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21424 states. [2022-11-20 09:41:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21424 to 20953. [2022-11-20 09:41:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20953 states, 20948 states have (on average 4.967443192667558) internal successors, (104058), 20952 states have internal predecessors, (104058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20953 states to 20953 states and 104058 transitions. [2022-11-20 09:41:07,270 INFO L78 Accepts]: Start accepts. Automaton has 20953 states and 104058 transitions. Word has length 15 [2022-11-20 09:41:07,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:07,270 INFO L495 AbstractCegarLoop]: Abstraction has 20953 states and 104058 transitions. [2022-11-20 09:41:07,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 20953 states and 104058 transitions. [2022-11-20 09:41:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:07,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:07,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:07,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:07,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:07,482 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:07,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1773596499, now seen corresponding path program 3 times [2022-11-20 09:41:07,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:07,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059263276] [2022-11-20 09:41:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:41:07,484 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 [2022-11-20 09:41:07,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:07,485 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:07,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-20 09:41:08,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:41:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:08,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:08,450 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:08,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:08,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:09,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:09,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059263276] [2022-11-20 09:41:09,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059263276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:09,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:09,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534644380] [2022-11-20 09:41:09,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:09,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:09,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:09,621 INFO L87 Difference]: Start difference. First operand 20953 states and 104058 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:10,449 INFO L93 Difference]: Finished difference Result 21407 states and 106109 transitions. [2022-11-20 09:41:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:41:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:10,549 INFO L225 Difference]: With dead ends: 21407 [2022-11-20 09:41:10,549 INFO L226 Difference]: Without dead ends: 21407 [2022-11-20 09:41:10,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:10,550 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:10,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 23 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 79 Unchecked, 0.6s Time] [2022-11-20 09:41:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21407 states. [2022-11-20 09:41:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21407 to 20962. [2022-11-20 09:41:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20962 states, 20957 states have (on average 4.967027723433698) internal successors, (104094), 20961 states have internal predecessors, (104094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20962 states to 20962 states and 104094 transitions. [2022-11-20 09:41:11,351 INFO L78 Accepts]: Start accepts. Automaton has 20962 states and 104094 transitions. Word has length 15 [2022-11-20 09:41:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:11,352 INFO L495 AbstractCegarLoop]: Abstraction has 20962 states and 104094 transitions. [2022-11-20 09:41:11,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 20962 states and 104094 transitions. [2022-11-20 09:41:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:11,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:11,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:11,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Ended with exit code 0 [2022-11-20 09:41:11,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:11,560 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:11,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1773580689, now seen corresponding path program 4 times [2022-11-20 09:41:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:11,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666208441] [2022-11-20 09:41:11,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:41:11,562 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 [2022-11-20 09:41:11,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:11,563 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:11,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-20 09:41:12,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:41:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:12,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:12,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:12,437 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:12,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:12,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:13,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:13,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666208441] [2022-11-20 09:41:13,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666208441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:13,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:13,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:13,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950010059] [2022-11-20 09:41:13,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:13,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:13,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:13,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:13,571 INFO L87 Difference]: Start difference. First operand 20962 states and 104094 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:14,315 INFO L93 Difference]: Finished difference Result 21272 states and 105570 transitions. [2022-11-20 09:41:14,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:41:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:14,414 INFO L225 Difference]: With dead ends: 21272 [2022-11-20 09:41:14,414 INFO L226 Difference]: Without dead ends: 21272 [2022-11-20 09:41:14,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:14,414 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:14,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 20 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 32 Unchecked, 0.5s Time] [2022-11-20 09:41:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21272 states. [2022-11-20 09:41:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21272 to 20963. [2022-11-20 09:41:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20963 states, 20958 states have (on average 4.9669815822120436) internal successors, (104098), 20962 states have internal predecessors, (104098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20963 states to 20963 states and 104098 transitions. [2022-11-20 09:41:15,390 INFO L78 Accepts]: Start accepts. Automaton has 20963 states and 104098 transitions. Word has length 15 [2022-11-20 09:41:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:15,390 INFO L495 AbstractCegarLoop]: Abstraction has 20963 states and 104098 transitions. [2022-11-20 09:41:15,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 20963 states and 104098 transitions. [2022-11-20 09:41:15,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:15,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:15,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:15,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Ended with exit code 0 [2022-11-20 09:41:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:15,603 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1773585060, now seen corresponding path program 2 times [2022-11-20 09:41:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532662148] [2022-11-20 09:41:15,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:41:15,604 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 [2022-11-20 09:41:15,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:15,605 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:15,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-20 09:41:16,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:41:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:16,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:16,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:16,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:16,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:17,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:17,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532662148] [2022-11-20 09:41:17,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532662148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:17,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:17,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:17,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985952551] [2022-11-20 09:41:17,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:17,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:17,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:17,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:17,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:17,789 INFO L87 Difference]: Start difference. First operand 20963 states and 104098 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:18,581 INFO L93 Difference]: Finished difference Result 21658 states and 107789 transitions. [2022-11-20 09:41:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:41:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:18,685 INFO L225 Difference]: With dead ends: 21658 [2022-11-20 09:41:18,685 INFO L226 Difference]: Without dead ends: 21658 [2022-11-20 09:41:18,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:18,685 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:18,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 20 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 61 Unchecked, 0.5s Time] [2022-11-20 09:41:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21658 states. [2022-11-20 09:41:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21658 to 20964. [2022-11-20 09:41:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20964 states, 20959 states have (on average 4.966935445393387) internal successors, (104102), 20963 states have internal predecessors, (104102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20964 states to 20964 states and 104102 transitions. [2022-11-20 09:41:19,524 INFO L78 Accepts]: Start accepts. Automaton has 20964 states and 104102 transitions. Word has length 15 [2022-11-20 09:41:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:19,524 INFO L495 AbstractCegarLoop]: Abstraction has 20964 states and 104102 transitions. [2022-11-20 09:41:19,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 20964 states and 104102 transitions. [2022-11-20 09:41:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:19,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:19,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:19,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:19,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:19,733 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1773732000, now seen corresponding path program 3 times [2022-11-20 09:41:19,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:19,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245024529] [2022-11-20 09:41:19,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:41:19,734 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 [2022-11-20 09:41:19,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:19,736 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:19,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-20 09:41:20,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 09:41:20,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:20,627 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:20,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:21,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:21,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245024529] [2022-11-20 09:41:21,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245024529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:21,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:21,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:21,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642830673] [2022-11-20 09:41:21,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:21,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:21,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:21,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:21,801 INFO L87 Difference]: Start difference. First operand 20964 states and 104102 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:22,404 INFO L93 Difference]: Finished difference Result 21346 states and 106087 transitions. [2022-11-20 09:41:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:41:22,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:22,501 INFO L225 Difference]: With dead ends: 21346 [2022-11-20 09:41:22,501 INFO L226 Difference]: Without dead ends: 21346 [2022-11-20 09:41:22,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:22,502 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:22,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-20 09:41:22,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21346 states. [2022-11-20 09:41:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21346 to 20965. [2022-11-20 09:41:22,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20965 states, 20960 states have (on average 4.9668893129770995) internal successors, (104106), 20964 states have internal predecessors, (104106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20965 states to 20965 states and 104106 transitions. [2022-11-20 09:41:23,453 INFO L78 Accepts]: Start accepts. Automaton has 20965 states and 104106 transitions. Word has length 15 [2022-11-20 09:41:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:23,453 INFO L495 AbstractCegarLoop]: Abstraction has 20965 states and 104106 transitions. [2022-11-20 09:41:23,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 20965 states and 104106 transitions. [2022-11-20 09:41:23,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:23,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:23,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:23,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:23,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:23,669 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:23,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1633597823, now seen corresponding path program 5 times [2022-11-20 09:41:23,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:23,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934641885] [2022-11-20 09:41:23,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 09:41:23,670 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 [2022-11-20 09:41:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:23,672 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:23,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Waiting until timeout for monitored process [2022-11-20 09:41:24,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:41:24,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 09:41:24,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:24,444 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:24,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:24,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:25,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934641885] [2022-11-20 09:41:25,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934641885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:25,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:25,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-20 09:41:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93601654] [2022-11-20 09:41:25,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:25,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:41:25,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:41:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:41:25,961 INFO L87 Difference]: Start difference. First operand 20965 states and 104106 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2022-11-20 09:41:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:26,806 INFO L93 Difference]: Finished difference Result 22283 states and 110587 transitions. [2022-11-20 09:41:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:41:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 [2022-11-20 09:41:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:26,933 INFO L225 Difference]: With dead ends: 22283 [2022-11-20 09:41:26,933 INFO L226 Difference]: Without dead ends: 22283 [2022-11-20 09:41:26,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:41:26,934 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:26,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 85 Unchecked, 0.5s Time] [2022-11-20 09:41:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2022-11-20 09:41:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 20969. [2022-11-20 09:41:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20969 states, 20964 states have (on average 4.966609425682122) internal successors, (104120), 20968 states have internal predecessors, (104120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:27,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20969 states to 20969 states and 104120 transitions. [2022-11-20 09:41:27,870 INFO L78 Accepts]: Start accepts. Automaton has 20969 states and 104120 transitions. Word has length 15 [2022-11-20 09:41:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:27,871 INFO L495 AbstractCegarLoop]: Abstraction has 20969 states and 104120 transitions. [2022-11-20 09:41:27,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2022-11-20 09:41:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 20969 states and 104120 transitions. [2022-11-20 09:41:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:27,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:27,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:27,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Ended with exit code 0 [2022-11-20 09:41:28,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:28,080 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1633462322, now seen corresponding path program 4 times [2022-11-20 09:41:28,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728814916] [2022-11-20 09:41:28,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:41:28,081 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 [2022-11-20 09:41:28,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:28,082 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:28,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-20 09:41:28,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:41:28,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:28,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:28,776 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:28,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:29,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 09:41:30,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:30,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728814916] [2022-11-20 09:41:30,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728814916] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:30,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:30,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:30,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182082080] [2022-11-20 09:41:30,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:30,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:30,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:30,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:30,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:30,172 INFO L87 Difference]: Start difference. First operand 20969 states and 104120 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:30,934 INFO L93 Difference]: Finished difference Result 21306 states and 105852 transitions. [2022-11-20 09:41:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:41:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:31,032 INFO L225 Difference]: With dead ends: 21306 [2022-11-20 09:41:31,032 INFO L226 Difference]: Without dead ends: 21306 [2022-11-20 09:41:31,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:31,033 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:31,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2022-11-20 09:41:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21306 states. [2022-11-20 09:41:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21306 to 20969. [2022-11-20 09:41:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20969 states, 20964 states have (on average 4.966609425682122) internal successors, (104120), 20968 states have internal predecessors, (104120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20969 states to 20969 states and 104120 transitions. [2022-11-20 09:41:31,849 INFO L78 Accepts]: Start accepts. Automaton has 20969 states and 104120 transitions. Word has length 15 [2022-11-20 09:41:31,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:31,849 INFO L495 AbstractCegarLoop]: Abstraction has 20969 states and 104120 transitions. [2022-11-20 09:41:31,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20969 states and 104120 transitions. [2022-11-20 09:41:31,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:31,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:31,857 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:31,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:32,057 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:32,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:32,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1624825815, now seen corresponding path program 4 times [2022-11-20 09:41:32,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:32,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633206211] [2022-11-20 09:41:32,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:41:32,058 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 [2022-11-20 09:41:32,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:32,059 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:32,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-20 09:41:32,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:41:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:32,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:41:32,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:32,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:32,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:33,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:35,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:35,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633206211] [2022-11-20 09:41:35,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633206211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:35,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:35,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:41:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633528381] [2022-11-20 09:41:35,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:35,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:41:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:41:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:41:35,175 INFO L87 Difference]: Start difference. First operand 20969 states and 104120 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:41:40,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:40,003 INFO L93 Difference]: Finished difference Result 21015 states and 104270 transitions. [2022-11-20 09:41:40,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 09:41:40,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2022-11-20 09:41:40,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:40,121 INFO L225 Difference]: With dead ends: 21015 [2022-11-20 09:41:40,121 INFO L226 Difference]: Without dead ends: 21015 [2022-11-20 09:41:40,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=192, Invalid=620, Unknown=0, NotChecked=0, Total=812 [2022-11-20 09:41:40,122 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:40,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 127 Unchecked, 1.5s Time] [2022-11-20 09:41:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21015 states. [2022-11-20 09:41:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21015 to 20977. [2022-11-20 09:41:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20977 states, 20972 states have (on average 4.965668510394812) internal successors, (104140), 20976 states have internal predecessors, (104140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20977 states to 20977 states and 104140 transitions. [2022-11-20 09:41:41,321 INFO L78 Accepts]: Start accepts. Automaton has 20977 states and 104140 transitions. Word has length 15 [2022-11-20 09:41:41,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:41,321 INFO L495 AbstractCegarLoop]: Abstraction has 20977 states and 104140 transitions. [2022-11-20 09:41:41,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:41:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 20977 states and 104140 transitions. [2022-11-20 09:41:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:41,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:41,345 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:41,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:41,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:41,561 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:41,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1372590465, now seen corresponding path program 19 times [2022-11-20 09:41:41,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:41,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332355551] [2022-11-20 09:41:41,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:41:41,562 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 [2022-11-20 09:41:41,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:41,563 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:41,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2022-11-20 09:41:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:42,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 09:41:42,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:42,288 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:42,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:42,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:41:44,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:44,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332355551] [2022-11-20 09:41:44,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332355551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:44,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:44,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-20 09:41:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245200518] [2022-11-20 09:41:44,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:41:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:41:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:41:44,698 INFO L87 Difference]: Start difference. First operand 20977 states and 104140 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:41:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:46,589 INFO L93 Difference]: Finished difference Result 21005 states and 104251 transitions. [2022-11-20 09:41:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 09:41:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2022-11-20 09:41:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:46,683 INFO L225 Difference]: With dead ends: 21005 [2022-11-20 09:41:46,683 INFO L226 Difference]: Without dead ends: 21005 [2022-11-20 09:41:46,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:41:46,683 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:46,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 44 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-11-20 09:41:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21005 states. [2022-11-20 09:41:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21005 to 20985. [2022-11-20 09:41:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20985 states, 20980 states have (on average 4.965300285986654) internal successors, (104172), 20984 states have internal predecessors, (104172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20985 states to 20985 states and 104172 transitions. [2022-11-20 09:41:47,560 INFO L78 Accepts]: Start accepts. Automaton has 20985 states and 104172 transitions. Word has length 15 [2022-11-20 09:41:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:47,560 INFO L495 AbstractCegarLoop]: Abstraction has 20985 states and 104172 transitions. [2022-11-20 09:41:47,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2022-11-20 09:41:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 20985 states and 104172 transitions. [2022-11-20 09:41:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:47,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:47,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:47,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Ended with exit code 0 [2022-11-20 09:41:47,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:47,768 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:47,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1243714289, now seen corresponding path program 6 times [2022-11-20 09:41:47,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:47,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665674232] [2022-11-20 09:41:47,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 09:41:47,770 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 [2022-11-20 09:41:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:47,771 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:47,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-20 09:41:48,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-20 09:41:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:48,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:48,481 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:48,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:48,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:49,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:49,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665674232] [2022-11-20 09:41:49,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665674232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:49,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:49,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:49,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151825309] [2022-11-20 09:41:49,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:49,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:49,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:49,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:49,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:49,661 INFO L87 Difference]: Start difference. First operand 20985 states and 104172 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:50,323 INFO L93 Difference]: Finished difference Result 21362 states and 105976 transitions. [2022-11-20 09:41:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:41:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:50,419 INFO L225 Difference]: With dead ends: 21362 [2022-11-20 09:41:50,419 INFO L226 Difference]: Without dead ends: 21362 [2022-11-20 09:41:50,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:50,420 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:50,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 28 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-20 09:41:50,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21362 states. [2022-11-20 09:41:50,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21362 to 21015. [2022-11-20 09:41:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21015 states, 21010 states have (on average 4.964731080437887) internal successors, (104309), 21014 states have internal predecessors, (104309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21015 states to 21015 states and 104309 transitions. [2022-11-20 09:41:50,997 INFO L78 Accepts]: Start accepts. Automaton has 21015 states and 104309 transitions. Word has length 15 [2022-11-20 09:41:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:50,998 INFO L495 AbstractCegarLoop]: Abstraction has 21015 states and 104309 transitions. [2022-11-20 09:41:50,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 21015 states and 104309 transitions. [2022-11-20 09:41:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:51,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:51,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:51,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Ended with exit code 0 [2022-11-20 09:41:51,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:51,206 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1243704989, now seen corresponding path program 7 times [2022-11-20 09:41:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:51,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769462106] [2022-11-20 09:41:51,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 09:41:51,207 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 [2022-11-20 09:41:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:51,208 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:51,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-20 09:41:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:41:51,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:51,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:52,128 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:52,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-20 09:41:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:52,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:41:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:41:53,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 09:41:53,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769462106] [2022-11-20 09:41:53,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769462106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:41:53,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:41:53,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-20 09:41:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658921076] [2022-11-20 09:41:53,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:41:53,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:41:53,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 09:41:53,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:41:53,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:41:53,262 INFO L87 Difference]: Start difference. First operand 21015 states and 104309 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:41:53,965 INFO L93 Difference]: Finished difference Result 21336 states and 105903 transitions. [2022-11-20 09:41:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 09:41:53,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 [2022-11-20 09:41:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:41:54,065 INFO L225 Difference]: With dead ends: 21336 [2022-11-20 09:41:54,065 INFO L226 Difference]: Without dead ends: 21336 [2022-11-20 09:41:54,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-20 09:41:54,066 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:41:54,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-11-20 09:41:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21336 states. [2022-11-20 09:41:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21336 to 21017. [2022-11-20 09:41:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21017 states, 21012 states have (on average 4.964639253759756) internal successors, (104317), 21016 states have internal predecessors, (104317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:41:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21017 states to 21017 states and 104317 transitions. [2022-11-20 09:41:54,896 INFO L78 Accepts]: Start accepts. Automaton has 21017 states and 104317 transitions. Word has length 15 [2022-11-20 09:41:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:41:54,896 INFO L495 AbstractCegarLoop]: Abstraction has 21017 states and 104317 transitions. [2022-11-20 09:41:54,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-11-20 09:41:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 21017 states and 104317 transitions. [2022-11-20 09:41:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 09:41:54,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:41:54,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:41:54,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Forceful destruction successful, exit code 0 [2022-11-20 09:41:55,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 09:41:55,106 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-20 09:41:55,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:41:55,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1244204399, now seen corresponding path program 8 times [2022-11-20 09:41:55,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 09:41:55,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125889865] [2022-11-20 09:41:55,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:41:55,107 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 [2022-11-20 09:41:55,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 09:41:55,108 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -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) [2022-11-20 09:41:55,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccc88247-ed92-4b0d-8479-536de8bfd700/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Waiting until timeout for monitored process [2022-11-20 09:41:55,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:41:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:41:55,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:41:55,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:41:55,840 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 09:41:55,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44