./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:57:42,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:57:42,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:57:42,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:57:42,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:57:42,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:57:42,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:57:42,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:57:42,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:57:42,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:57:42,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:57:42,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:57:42,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:57:42,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:57:42,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:57:42,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:57:42,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:57:42,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:57:42,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:57:42,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:57:42,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:57:42,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:57:42,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:57:42,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:57:42,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:57:42,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:57:42,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:57:42,726 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:57:42,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:57:42,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:57:42,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:57:42,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:57:42,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:57:42,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:57:42,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:57:42,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:57:42,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:57:42,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:57:42,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:57:42,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:57:42,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:57:42,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:57:42,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:57:42,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:57:42,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:57:42,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:57:42,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:57:42,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:57:42,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:57:42,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:57:42,769 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:57:42,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:57:42,770 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:57:42,770 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:57:42,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:57:42,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:57:42,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:57:42,771 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:57:42,772 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:57:42,772 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:57:42,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:57:42,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:57:42,773 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:57:42,773 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:57:42,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:57:42,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:57:42,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:57:42,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:57:42,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:57:42,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:57:42,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:57:42,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:57:42,776 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_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-11-18 20:57:43,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:57:43,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:57:43,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:57:43,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:57:43,145 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:57:43,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-11-18 20:57:43,236 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/2091cf3c6/6476ab02dcd54b0eb740649bb873e7df/FLAGed93f9e11 [2022-11-18 20:57:43,864 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:57:43,867 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-11-18 20:57:43,878 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/2091cf3c6/6476ab02dcd54b0eb740649bb873e7df/FLAGed93f9e11 [2022-11-18 20:57:44,178 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/2091cf3c6/6476ab02dcd54b0eb740649bb873e7df [2022-11-18 20:57:44,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:57:44,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:57:44,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:57:44,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:57:44,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:57:44,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:44" (1/1) ... [2022-11-18 20:57:44,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9ee176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:44, skipping insertion in model container [2022-11-18 20:57:44,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:44" (1/1) ... [2022-11-18 20:57:44,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:57:44,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:57:44,508 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-11-18 20:57:44,520 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:57:44,532 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-18 20:57:44,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54ef166f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:44, skipping insertion in model container [2022-11-18 20:57:44,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:57:44,534 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 20:57:44,536 INFO L158 Benchmark]: Toolchain (without parser) took 351.72ms. Allocated memory is still 142.6MB. Free memory was 109.2MB in the beginning and 118.1MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:57:44,537 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 79.7MB. Free memory is still 35.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:57:44,538 INFO L158 Benchmark]: CACSL2BoogieTranslator took 348.34ms. Allocated memory is still 142.6MB. Free memory was 108.9MB in the beginning and 118.1MB in the end (delta: -9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:57:44,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 79.7MB. Free memory is still 35.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 348.34ms. Allocated memory is still 142.6MB. Free memory was 108.9MB in the beginning and 118.1MB in the end (delta: -9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:57:47,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:57:47,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:57:47,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:57:47,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:57:47,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:57:47,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:57:47,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:57:47,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:57:47,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:57:47,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:57:47,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:57:47,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:57:47,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:57:47,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:57:47,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:57:47,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:57:47,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:57:47,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:57:47,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:57:47,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:57:47,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:57:47,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:57:47,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:57:47,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:57:47,125 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:57:47,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:57:47,126 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:57:47,127 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:57:47,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:57:47,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:57:47,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:57:47,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:57:47,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:57:47,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:57:47,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:57:47,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:57:47,138 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:57:47,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:57:47,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:57:47,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:57:47,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-18 20:57:47,192 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:57:47,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:57:47,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:57:47,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:57:47,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:57:47,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:57:47,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:57:47,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:57:47,203 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:57:47,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:57:47,204 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:57:47,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:57:47,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:57:47,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:57:47,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:57:47,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:57:47,206 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:57:47,207 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:57:47,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:57:47,207 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:57:47,207 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:57:47,208 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:57:47,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:57:47,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:57:47,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:57:47,209 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:57:47,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:57:47,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:57:47,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:57:47,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:57:47,211 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:57:47,211 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:57:47,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:57:47,212 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_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 251696ec6cec82b3ac56ff493f8f4412eaff7e5010650cc9da1e4c426de80d8c [2022-11-18 20:57:47,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:57:47,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:57:47,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:57:47,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:57:47,763 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:57:47,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-11-18 20:57:47,858 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/5fe61d3d9/36f1eee1275e40b0826aa4b392b34be8/FLAGcf1e53d23 [2022-11-18 20:57:48,582 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:57:48,582 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2022-11-18 20:57:48,592 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/5fe61d3d9/36f1eee1275e40b0826aa4b392b34be8/FLAGcf1e53d23 [2022-11-18 20:57:48,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/data/5fe61d3d9/36f1eee1275e40b0826aa4b392b34be8 [2022-11-18 20:57:48,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:57:48,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:57:48,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:57:48,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:57:48,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:57:48,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:48" (1/1) ... [2022-11-18 20:57:48,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45eaffa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:48, skipping insertion in model container [2022-11-18 20:57:48,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:57:48" (1/1) ... [2022-11-18 20:57:48,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:57:48,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:57:49,304 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-11-18 20:57:49,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:57:49,404 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 20:57:49,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:57:49,446 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-11-18 20:57:49,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:57:49,472 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:57:49,519 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c[2586,2599] [2022-11-18 20:57:49,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:57:49,555 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:57:49,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49 WrapperNode [2022-11-18 20:57:49,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:57:49,561 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:57:49,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:57:49,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:57:49,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,638 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 99 [2022-11-18 20:57:49,638 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:57:49,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:57:49,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:57:49,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:57:49,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,687 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:57:49,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:57:49,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:57:49,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:57:49,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (1/1) ... [2022-11-18 20:57:49,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:57:49,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:49,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:57:49,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:57:49,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:57:49,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:57:49,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:57:49,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 20:57:49,788 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:57:49,788 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:57:49,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:57:49,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:57:49,789 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 20:57:49,789 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 20:57:49,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:57:49,790 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:57:49,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:57:49,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:57:49,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:57:49,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:57:49,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 20:57:49,793 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:57:49,954 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:57:49,956 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:57:50,784 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:57:50,943 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:57:50,943 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:57:50,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:57:50 BoogieIcfgContainer [2022-11-18 20:57:50,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:57:50,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:57:50,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:57:50,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:57:50,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:57:48" (1/3) ... [2022-11-18 20:57:50,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40834052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:57:50, skipping insertion in model container [2022-11-18 20:57:50,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:57:49" (2/3) ... [2022-11-18 20:57:50,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40834052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:57:50, skipping insertion in model container [2022-11-18 20:57:50,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:57:50" (3/3) ... [2022-11-18 20:57:50,956 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2022-11-18 20:57:50,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:57:50,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-18 20:57:50,980 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:57:51,140 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:57:51,194 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:57:51,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-18 20:57:51,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 181 transitions, 386 flow [2022-11-18 20:57:51,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 181 transitions, 386 flow [2022-11-18 20:57:51,372 INFO L130 PetriNetUnfolder]: 12/178 cut-off events. [2022-11-18 20:57:51,372 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:57:51,395 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. [2022-11-18 20:57:51,399 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-18 20:58:27,517 INFO L134 LiptonReduction]: Checked pairs total: 3576 [2022-11-18 20:58:27,518 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-11-18 20:58:27,528 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-11-18 20:58:27,652 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) [2022-11-18 20:58:27,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:58:27,689 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;@3c49b4e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:58:27,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-18 20:58:27,698 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) [2022-11-18 20:58:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:58:27,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:27,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:58:27,706 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:27,721 INFO L85 PathProgramCache]: Analyzing trace with hash 23267, now seen corresponding path program 1 times [2022-11-18 20:58:27,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:27,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107834162] [2022-11-18 20:58:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:27,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:27,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 20:58:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:27,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:58:27,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:28,111 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:58:28,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-18 20:58:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:28,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:28,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:28,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107834162] [2022-11-18 20:58:28,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107834162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:28,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:28,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:28,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238153874] [2022-11-18 20:58:28,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:28,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:28,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:28,207 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) [2022-11-18 20:58:28,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:28,493 INFO L93 Difference]: Finished difference Result 748 states and 2564 transitions. [2022-11-18 20:58:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 20:58:28,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:28,520 INFO L225 Difference]: With dead ends: 748 [2022-11-18 20:58:28,521 INFO L226 Difference]: Without dead ends: 748 [2022-11-18 20:58:28,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:28,526 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 [2022-11-18 20:58:28,528 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] [2022-11-18 20:58:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-18 20:58:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-18 20:58:28,642 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) [2022-11-18 20:58:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2564 transitions. [2022-11-18 20:58:28,651 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2564 transitions. Word has length 2 [2022-11-18 20:58:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:28,653 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2564 transitions. [2022-11-18 20:58:28,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2564 transitions. [2022-11-18 20:58:28,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:58:28,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:28,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:58:28,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-18 20:58:28,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:28,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash 23268, now seen corresponding path program 1 times [2022-11-18 20:58:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:28,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331971829] [2022-11-18 20:58:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:28,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:28,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:28,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:28,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 20:58:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:28,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:58:28,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:29,180 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:29,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:29,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:29,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:29,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331971829] [2022-11-18 20:58:29,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331971829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:29,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:29,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:29,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130486757] [2022-11-18 20:58:29,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:29,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:29,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:29,254 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) [2022-11-18 20:58:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:29,832 INFO L93 Difference]: Finished difference Result 1494 states and 5126 transitions. [2022-11-18 20:58:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 20:58:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:29,847 INFO L225 Difference]: With dead ends: 1494 [2022-11-18 20:58:29,847 INFO L226 Difference]: Without dead ends: 1494 [2022-11-18 20:58:29,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:29,857 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:29,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:58:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-18 20:58:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 749. [2022-11-18 20:58:29,909 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) [2022-11-18 20:58:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2568 transitions. [2022-11-18 20:58:29,914 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2568 transitions. Word has length 2 [2022-11-18 20:58:29,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:29,915 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2568 transitions. [2022-11-18 20:58:29,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:29,915 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2568 transitions. [2022-11-18 20:58:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:58:29,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:29,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:58:29,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:30,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:30,128 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:30,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash 23423, now seen corresponding path program 1 times [2022-11-18 20:58:30,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:30,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418502279] [2022-11-18 20:58:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:30,131 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 [2022-11-18 20:58:30,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:30,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:30,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 20:58:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:30,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:58:30,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:30,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:30,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:30,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418502279] [2022-11-18 20:58:30,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418502279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:30,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:30,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489681077] [2022-11-18 20:58:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:30,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:30,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:30,282 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) [2022-11-18 20:58:30,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:30,593 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-18 20:58:30,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:30,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 20:58:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:30,602 INFO L225 Difference]: With dead ends: 749 [2022-11-18 20:58:30,602 INFO L226 Difference]: Without dead ends: 749 [2022-11-18 20:58:30,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:30,603 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-18 20:58:30,604 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] [2022-11-18 20:58:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-18 20:58:30,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-18 20:58:30,652 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) [2022-11-18 20:58:30,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-18 20:58:30,658 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-18 20:58:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:30,658 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-18 20:58:30,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-18 20:58:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:58:30,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:30,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:58:30,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:30,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:30,878 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:30,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:30,878 INFO L85 PathProgramCache]: Analyzing trace with hash 725604, now seen corresponding path program 1 times [2022-11-18 20:58:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986473146] [2022-11-18 20:58:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:30,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:30,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:30,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 20:58:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:58:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:31,149 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:31,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:31,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:31,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:31,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986473146] [2022-11-18 20:58:31,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986473146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:31,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:31,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-18 20:58:31,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207972909] [2022-11-18 20:58:31,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:58:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:58:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:58:31,553 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) [2022-11-18 20:58:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:32,650 INFO L93 Difference]: Finished difference Result 1497 states and 5135 transitions. [2022-11-18 20:58:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:58:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-18 20:58:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:32,669 INFO L225 Difference]: With dead ends: 1497 [2022-11-18 20:58:32,670 INFO L226 Difference]: Without dead ends: 1497 [2022-11-18 20:58:32,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:58:32,672 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 163 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:32,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 9 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:58:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-11-18 20:58:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 752. [2022-11-18 20:58:32,710 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) [2022-11-18 20:58:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2577 transitions. [2022-11-18 20:58:32,716 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2577 transitions. Word has length 3 [2022-11-18 20:58:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:32,716 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 2577 transitions. [2022-11-18 20:58:32,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2577 transitions. [2022-11-18 20:58:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:58:32,717 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:32,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:58:32,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:32,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:32,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:32,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:32,943 INFO L85 PathProgramCache]: Analyzing trace with hash 725759, now seen corresponding path program 1 times [2022-11-18 20:58:32,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:32,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075333593] [2022-11-18 20:58:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:32,944 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 [2022-11-18 20:58:32,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:32,946 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:32,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 20:58:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:33,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:58:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:33,183 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-18 20:58:33,184 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 [2022-11-18 20:58:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:58:33,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:33,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:33,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075333593] [2022-11-18 20:58:33,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075333593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:33,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:33,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190706661] [2022-11-18 20:58:33,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:33,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:33,317 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) [2022-11-18 20:58:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:33,517 INFO L93 Difference]: Finished difference Result 751 states and 2573 transitions. [2022-11-18 20:58:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:33,518 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 [2022-11-18 20:58:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:33,525 INFO L225 Difference]: With dead ends: 751 [2022-11-18 20:58:33,525 INFO L226 Difference]: Without dead ends: 751 [2022-11-18 20:58:33,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:33,530 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:33,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-18 20:58:33,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-18 20:58:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-18 20:58:33,570 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) [2022-11-18 20:58:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2573 transitions. [2022-11-18 20:58:33,575 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2573 transitions. Word has length 3 [2022-11-18 20:58:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:33,577 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2573 transitions. [2022-11-18 20:58:33,578 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) [2022-11-18 20:58:33,578 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2573 transitions. [2022-11-18 20:58:33,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:58:33,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:33,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:58:33,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:33,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:33,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:33,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:33,794 INFO L85 PathProgramCache]: Analyzing trace with hash 725760, now seen corresponding path program 1 times [2022-11-18 20:58:33,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:33,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443083410] [2022-11-18 20:58:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:33,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:33,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:33,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:33,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 20:58:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:33,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:58:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:33,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:33,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:34,102 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-18 20:58:34,102 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 [2022-11-18 20:58:34,141 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:58:34,142 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 [2022-11-18 20:58:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:34,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:34,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:34,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443083410] [2022-11-18 20:58:34,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443083410] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:34,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:58:34,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-18 20:58:34,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616335609] [2022-11-18 20:58:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:34,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:58:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:58:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:58:34,420 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) [2022-11-18 20:58:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:34,725 INFO L93 Difference]: Finished difference Result 625 states and 2069 transitions. [2022-11-18 20:58:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:34,727 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 [2022-11-18 20:58:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:34,733 INFO L225 Difference]: With dead ends: 625 [2022-11-18 20:58:34,733 INFO L226 Difference]: Without dead ends: 625 [2022-11-18 20:58:34,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:58:34,734 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:34,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:58:34,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-18 20:58:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2022-11-18 20:58:34,758 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) [2022-11-18 20:58:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2069 transitions. [2022-11-18 20:58:34,763 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2069 transitions. Word has length 3 [2022-11-18 20:58:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:34,765 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 2069 transitions. [2022-11-18 20:58:34,765 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) [2022-11-18 20:58:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2069 transitions. [2022-11-18 20:58:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:58:34,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:34,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:58:34,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:34,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:34,995 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 697470199, now seen corresponding path program 1 times [2022-11-18 20:58:34,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:34,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529421341] [2022-11-18 20:58:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:34,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:34,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:34,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:34,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 20:58:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:35,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:58:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:35,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:35,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:35,311 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-18 20:58:35,312 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 [2022-11-18 20:58:35,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 20:58:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:35,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:35,982 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:35,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529421341] [2022-11-18 20:58:35,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529421341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:35,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:35,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 20:58:35,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018470482] [2022-11-18 20:58:35,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:35,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:58:35,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:58:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:58:35,984 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) [2022-11-18 20:58:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:36,634 INFO L93 Difference]: Finished difference Result 631 states and 2089 transitions. [2022-11-18 20:58:36,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:58:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:58:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:36,642 INFO L225 Difference]: With dead ends: 631 [2022-11-18 20:58:36,642 INFO L226 Difference]: Without dead ends: 631 [2022-11-18 20:58:36,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:58:36,643 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-11-18 20:58:36,644 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] [2022-11-18 20:58:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-18 20:58:36,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 628. [2022-11-18 20:58:36,671 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) [2022-11-18 20:58:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2079 transitions. [2022-11-18 20:58:36,676 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2079 transitions. Word has length 5 [2022-11-18 20:58:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:36,676 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2079 transitions. [2022-11-18 20:58:36,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2079 transitions. [2022-11-18 20:58:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:58:36,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:36,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:58:36,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:36,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:36,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash 697470198, now seen corresponding path program 1 times [2022-11-18 20:58:36,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:36,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800201489] [2022-11-18 20:58:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:36,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:36,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:36,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:36,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 20:58:37,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:37,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:58:37,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:37,122 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:58:37,122 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 [2022-11-18 20:58:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:58:37,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:37,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800201489] [2022-11-18 20:58:37,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800201489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:37,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:37,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606155740] [2022-11-18 20:58:37,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:37,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:37,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:37,298 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) [2022-11-18 20:58:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:37,443 INFO L93 Difference]: Finished difference Result 628 states and 2081 transitions. [2022-11-18 20:58:37,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:37,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:58:37,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:37,450 INFO L225 Difference]: With dead ends: 628 [2022-11-18 20:58:37,450 INFO L226 Difference]: Without dead ends: 628 [2022-11-18 20:58:37,450 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 [2022-11-18 20:58:37,451 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 [2022-11-18 20:58:37,451 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] [2022-11-18 20:58:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-18 20:58:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2022-11-18 20:58:37,473 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) [2022-11-18 20:58:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2081 transitions. [2022-11-18 20:58:37,477 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2081 transitions. Word has length 5 [2022-11-18 20:58:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:37,478 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2081 transitions. [2022-11-18 20:58:37,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2081 transitions. [2022-11-18 20:58:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:58:37,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:37,479 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-18 20:58:37,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:37,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:37,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:37,695 INFO L85 PathProgramCache]: Analyzing trace with hash 145898212, now seen corresponding path program 2 times [2022-11-18 20:58:37,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:37,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640518270] [2022-11-18 20:58:37,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:37,696 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:37,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 20:58:37,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:58:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:37,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:58:37,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:38,013 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:38,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:38,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:39,136 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:39,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640518270] [2022-11-18 20:58:39,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640518270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:39,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:39,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:58:39,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822783324] [2022-11-18 20:58:39,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:39,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:58:39,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:39,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:58:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:58:39,138 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) [2022-11-18 20:58:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:45,881 INFO L93 Difference]: Finished difference Result 5573 states and 18575 transitions. [2022-11-18 20:58:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:58:45,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 20:58:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:45,925 INFO L225 Difference]: With dead ends: 5573 [2022-11-18 20:58:45,925 INFO L226 Difference]: Without dead ends: 5573 [2022-11-18 20:58:45,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:58:45,926 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 962 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:45,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 72 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 20:58:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2022-11-18 20:58:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 634. [2022-11-18 20:58:46,049 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) [2022-11-18 20:58:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 2093 transitions. [2022-11-18 20:58:46,053 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 2093 transitions. Word has length 6 [2022-11-18 20:58:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:46,054 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 2093 transitions. [2022-11-18 20:58:46,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 2093 transitions. [2022-11-18 20:58:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:58:46,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:46,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:58:46,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:46,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:46,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:46,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:46,276 INFO L85 PathProgramCache]: Analyzing trace with hash 146734139, now seen corresponding path program 1 times [2022-11-18 20:58:46,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:46,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793716226] [2022-11-18 20:58:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:46,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:46,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:46,278 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:46,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 20:58:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:58:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:46,492 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:58:46,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-18 20:58:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:58:46,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:46,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:46,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793716226] [2022-11-18 20:58:46,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793716226] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:46,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:46,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:58:46,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745177104] [2022-11-18 20:58:46,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:46,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:58:46,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:46,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:58:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:58:46,534 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) [2022-11-18 20:58:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:46,770 INFO L93 Difference]: Finished difference Result 371 states and 1188 transitions. [2022-11-18 20:58:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:58:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 20:58:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:46,774 INFO L225 Difference]: With dead ends: 371 [2022-11-18 20:58:46,774 INFO L226 Difference]: Without dead ends: 371 [2022-11-18 20:58:46,774 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 [2022-11-18 20:58:46,775 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 [2022-11-18 20:58:46,775 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] [2022-11-18 20:58:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-18 20:58:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-11-18 20:58:46,801 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) [2022-11-18 20:58:46,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1188 transitions. [2022-11-18 20:58:46,804 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1188 transitions. Word has length 6 [2022-11-18 20:58:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:46,804 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 1188 transitions. [2022-11-18 20:58:46,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:46,804 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1188 transitions. [2022-11-18 20:58:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:58:46,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:46,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:58:46,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:47,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:47,019 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 146734140, now seen corresponding path program 1 times [2022-11-18 20:58:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:47,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538932889] [2022-11-18 20:58:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:47,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:47,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:47,022 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:47,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-18 20:58:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:47,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:58:47,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:47,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:47,504 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 [2022-11-18 20:58:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:47,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:47,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538932889] [2022-11-18 20:58:47,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538932889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:47,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:47,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:58:47,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849942533] [2022-11-18 20:58:47,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:47,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:58:47,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:47,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:58:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:58:47,594 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) [2022-11-18 20:58:48,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:48,960 INFO L93 Difference]: Finished difference Result 1156 states and 3704 transitions. [2022-11-18 20:58:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:58:48,965 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 [2022-11-18 20:58:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:48,973 INFO L225 Difference]: With dead ends: 1156 [2022-11-18 20:58:48,973 INFO L226 Difference]: Without dead ends: 1156 [2022-11-18 20:58:48,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:58:48,975 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 386 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:48,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 19 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:58:48,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-11-18 20:58:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 437. [2022-11-18 20:58:48,998 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) [2022-11-18 20:58:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1479 transitions. [2022-11-18 20:58:49,001 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1479 transitions. Word has length 6 [2022-11-18 20:58:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:49,001 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1479 transitions. [2022-11-18 20:58:49,002 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) [2022-11-18 20:58:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1479 transitions. [2022-11-18 20:58:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:58:49,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:49,003 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-18 20:58:49,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:49,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:49,218 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash 227908855, now seen corresponding path program 2 times [2022-11-18 20:58:49,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:49,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711717664] [2022-11-18 20:58:49,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:49,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:49,220 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:49,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-18 20:58:49,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:58:49,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:49,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:58:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:49,522 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 20:58:49,523 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 [2022-11-18 20:58:49,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:58:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:58:49,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:49,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:49,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711717664] [2022-11-18 20:58:49,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711717664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:49,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:49,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:58:49,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258071076] [2022-11-18 20:58:49,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:49,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:58:49,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:49,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:58:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:58:49,877 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) [2022-11-18 20:58:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:49,997 INFO L93 Difference]: Finished difference Result 435 states and 1474 transitions. [2022-11-18 20:58:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:58:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:58:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:50,000 INFO L225 Difference]: With dead ends: 435 [2022-11-18 20:58:50,000 INFO L226 Difference]: Without dead ends: 435 [2022-11-18 20:58:50,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:58:50,001 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 [2022-11-18 20:58:50,002 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] [2022-11-18 20:58:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-18 20:58:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 432. [2022-11-18 20:58:50,016 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) [2022-11-18 20:58:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1468 transitions. [2022-11-18 20:58:50,019 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1468 transitions. Word has length 7 [2022-11-18 20:58:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:50,019 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1468 transitions. [2022-11-18 20:58:50,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1468 transitions. [2022-11-18 20:58:50,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:58:50,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:50,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:50,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:50,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:50,235 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:50,235 INFO L85 PathProgramCache]: Analyzing trace with hash 253793607, now seen corresponding path program 1 times [2022-11-18 20:58:50,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:50,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131040844] [2022-11-18 20:58:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:50,236 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 [2022-11-18 20:58:50,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:50,237 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:50,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-18 20:58:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:50,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:58:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:50,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:50,623 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:50,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131040844] [2022-11-18 20:58:50,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131040844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:50,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:50,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-18 20:58:50,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76735183] [2022-11-18 20:58:50,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:50,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:58:50,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:50,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:58:50,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:58:50,625 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) [2022-11-18 20:58:51,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:51,594 INFO L93 Difference]: Finished difference Result 851 states and 2781 transitions. [2022-11-18 20:58:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:58:51,595 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 [2022-11-18 20:58:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:51,599 INFO L225 Difference]: With dead ends: 851 [2022-11-18 20:58:51,600 INFO L226 Difference]: Without dead ends: 851 [2022-11-18 20:58:51,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:58:51,601 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 231 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:51,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 24 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:58:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-11-18 20:58:51,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 432. [2022-11-18 20:58:51,619 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) [2022-11-18 20:58:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1402 transitions. [2022-11-18 20:58:51,621 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1402 transitions. Word has length 7 [2022-11-18 20:58:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:51,621 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1402 transitions. [2022-11-18 20:58:51,622 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) [2022-11-18 20:58:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1402 transitions. [2022-11-18 20:58:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:58:51,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:51,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:51,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:51,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:51,836 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:51,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash 253794196, now seen corresponding path program 1 times [2022-11-18 20:58:51,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:51,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464083269] [2022-11-18 20:58:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:51,837 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:51,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:51,839 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:51,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-18 20:58:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:58:51,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:52,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:52,135 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 20:58:52,135 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 [2022-11-18 20:58:52,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:58:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:52,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:52,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:52,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464083269] [2022-11-18 20:58:52,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464083269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:52,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:52,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 20:58:52,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389220764] [2022-11-18 20:58:52,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:52,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:58:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:58:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:58:52,807 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) [2022-11-18 20:58:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:53,305 INFO L93 Difference]: Finished difference Result 440 states and 1422 transitions. [2022-11-18 20:58:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:58:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:58:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:53,308 INFO L225 Difference]: With dead ends: 440 [2022-11-18 20:58:53,308 INFO L226 Difference]: Without dead ends: 440 [2022-11-18 20:58:53,308 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 [2022-11-18 20:58:53,308 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 [2022-11-18 20:58:53,309 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] [2022-11-18 20:58:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-18 20:58:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 436. [2022-11-18 20:58:53,320 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) [2022-11-18 20:58:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1412 transitions. [2022-11-18 20:58:53,322 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1412 transitions. Word has length 7 [2022-11-18 20:58:53,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:53,322 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 1412 transitions. [2022-11-18 20:58:53,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1412 transitions. [2022-11-18 20:58:53,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:58:53,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:53,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:53,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:53,530 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash 253794113, now seen corresponding path program 1 times [2022-11-18 20:58:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:53,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302034720] [2022-11-18 20:58:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:53,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:53,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:53,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-18 20:58:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:53,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:58:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:53,812 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:53,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:58:54,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:58:54,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:54,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302034720] [2022-11-18 20:58:54,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302034720] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:54,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:54,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:58:54,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263194512] [2022-11-18 20:58:54,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:54,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:58:54,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:54,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:58:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:58:54,507 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) [2022-11-18 20:58:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:56,255 INFO L93 Difference]: Finished difference Result 793 states and 2714 transitions. [2022-11-18 20:58:56,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:58:56,257 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 [2022-11-18 20:58:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:56,261 INFO L225 Difference]: With dead ends: 793 [2022-11-18 20:58:56,261 INFO L226 Difference]: Without dead ends: 793 [2022-11-18 20:58:56,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:58:56,262 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 283 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:56,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 17 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:58:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-18 20:58:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 643. [2022-11-18 20:58:56,284 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) [2022-11-18 20:58:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 2324 transitions. [2022-11-18 20:58:56,288 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 2324 transitions. Word has length 7 [2022-11-18 20:58:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:56,288 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 2324 transitions. [2022-11-18 20:58:56,289 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) [2022-11-18 20:58:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 2324 transitions. [2022-11-18 20:58:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:58:56,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:56,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:56,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:56,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:56,504 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 253794195, now seen corresponding path program 1 times [2022-11-18 20:58:56,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:56,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762310385] [2022-11-18 20:58:56,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:56,505 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:56,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:56,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:56,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-18 20:58:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:56,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:58:56,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:56,757 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-18 20:58:56,757 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 [2022-11-18 20:58:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:58:56,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:56,800 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762310385] [2022-11-18 20:58:56,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762310385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:56,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:56,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230923232] [2022-11-18 20:58:56,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:56,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:56,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:56,802 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) [2022-11-18 20:58:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:56,991 INFO L93 Difference]: Finished difference Result 621 states and 2257 transitions. [2022-11-18 20:58:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:56,992 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 [2022-11-18 20:58:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:56,995 INFO L225 Difference]: With dead ends: 621 [2022-11-18 20:58:56,996 INFO L226 Difference]: Without dead ends: 621 [2022-11-18 20:58:56,996 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 [2022-11-18 20:58:56,997 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:56,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:58:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-18 20:58:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 621. [2022-11-18 20:58:57,032 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) [2022-11-18 20:58:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 2257 transitions. [2022-11-18 20:58:57,036 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 2257 transitions. Word has length 7 [2022-11-18 20:58:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:57,036 INFO L495 AbstractCegarLoop]: Abstraction has 621 states and 2257 transitions. [2022-11-18 20:58:57,036 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) [2022-11-18 20:58:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 2257 transitions. [2022-11-18 20:58:57,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:58:57,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:57,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:57,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:57,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:57,250 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:57,251 INFO L85 PathProgramCache]: Analyzing trace with hash 253977843, now seen corresponding path program 1 times [2022-11-18 20:58:57,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:57,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600287692] [2022-11-18 20:58:57,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:57,252 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:57,253 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:57,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-18 20:58:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:58:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:57,460 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:58:57,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-18 20:58:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:58:57,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:57,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:57,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600287692] [2022-11-18 20:58:57,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600287692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:57,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:57,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:58:57,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144691603] [2022-11-18 20:58:57,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:57,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:58:57,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:58:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:58:57,505 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) [2022-11-18 20:58:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:57,663 INFO L93 Difference]: Finished difference Result 585 states and 2141 transitions. [2022-11-18 20:58:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:58:57,663 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 [2022-11-18 20:58:57,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:57,667 INFO L225 Difference]: With dead ends: 585 [2022-11-18 20:58:57,667 INFO L226 Difference]: Without dead ends: 585 [2022-11-18 20:58:57,667 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 [2022-11-18 20:58:57,668 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:57,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:58:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-18 20:58:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2022-11-18 20:58:57,685 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) [2022-11-18 20:58:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 2141 transitions. [2022-11-18 20:58:57,688 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 2141 transitions. Word has length 7 [2022-11-18 20:58:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:57,689 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 2141 transitions. [2022-11-18 20:58:57,689 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) [2022-11-18 20:58:57,689 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 2141 transitions. [2022-11-18 20:58:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:58:57,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:57,690 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:57,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:57,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:57,904 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash 253977844, now seen corresponding path program 1 times [2022-11-18 20:58:57,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:57,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085327540] [2022-11-18 20:58:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:57,905 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 [2022-11-18 20:58:57,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:57,906 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:57,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-18 20:58:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:58:58,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:58,215 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:58,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:58,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:58:58,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:58,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085327540] [2022-11-18 20:58:58,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085327540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:58,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:58,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 20:58:58,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464738130] [2022-11-18 20:58:58,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:58,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:58:58,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:58,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:58:58,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:58:58,810 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) [2022-11-18 20:58:59,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:59,162 INFO L93 Difference]: Finished difference Result 1116 states and 4132 transitions. [2022-11-18 20:58:59,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:58:59,163 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:58:59,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:59,167 INFO L225 Difference]: With dead ends: 1116 [2022-11-18 20:58:59,168 INFO L226 Difference]: Without dead ends: 1116 [2022-11-18 20:58:59,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:58:59,169 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:59,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 18 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2022-11-18 20:58:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-11-18 20:58:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 857. [2022-11-18 20:58:59,201 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) [2022-11-18 20:58:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 3320 transitions. [2022-11-18 20:58:59,206 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 3320 transitions. Word has length 7 [2022-11-18 20:58:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:59,206 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 3320 transitions. [2022-11-18 20:58:59,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:59,207 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 3320 transitions. [2022-11-18 20:58:59,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:58:59,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:59,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:59,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:59,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:59,422 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:58:59,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash -722314526, now seen corresponding path program 1 times [2022-11-18 20:58:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:59,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349384531] [2022-11-18 20:58:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:59,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:59,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:59,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:58:59,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-18 20:58:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:59,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:58:59,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:59,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:59,729 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 20:58:59,729 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 [2022-11-18 20:58:59,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-18 20:59:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:00,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:00,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349384531] [2022-11-18 20:59:00,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349384531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:00,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:00,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-18 20:59:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859333668] [2022-11-18 20:59:00,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:00,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:59:00,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:00,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:59:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:59:00,403 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) [2022-11-18 20:59:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:00,829 INFO L93 Difference]: Finished difference Result 858 states and 3320 transitions. [2022-11-18 20:59:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:59:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 20:59:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:00,834 INFO L225 Difference]: With dead ends: 858 [2022-11-18 20:59:00,834 INFO L226 Difference]: Without dead ends: 858 [2022-11-18 20:59:00,834 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 [2022-11-18 20:59:00,835 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 [2022-11-18 20:59:00,836 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] [2022-11-18 20:59:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-11-18 20:59:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2022-11-18 20:59:00,860 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) [2022-11-18 20:59:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 3320 transitions. [2022-11-18 20:59:00,865 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 3320 transitions. Word has length 8 [2022-11-18 20:59:00,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:00,866 INFO L495 AbstractCegarLoop]: Abstraction has 858 states and 3320 transitions. [2022-11-18 20:59:00,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:00,866 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 3320 transitions. [2022-11-18 20:59:00,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:59:00,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:00,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:00,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:01,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:01,081 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:01,082 INFO L85 PathProgramCache]: Analyzing trace with hash -716626654, now seen corresponding path program 1 times [2022-11-18 20:59:01,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:01,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627903452] [2022-11-18 20:59:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:01,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:01,084 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:01,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-18 20:59:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:59:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:01,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:01,624 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 [2022-11-18 20:59:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:01,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:01,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627903452] [2022-11-18 20:59:01,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627903452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:01,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:01,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397591066] [2022-11-18 20:59:01,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:01,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:01,717 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) [2022-11-18 20:59:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:02,910 INFO L93 Difference]: Finished difference Result 1652 states and 6140 transitions. [2022-11-18 20:59:02,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:59:02,911 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-18 20:59:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:02,918 INFO L225 Difference]: With dead ends: 1652 [2022-11-18 20:59:02,918 INFO L226 Difference]: Without dead ends: 1652 [2022-11-18 20:59:02,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:59:02,921 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 387 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:02,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 17 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:59:02,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2022-11-18 20:59:02,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1069. [2022-11-18 20:59:02,979 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) [2022-11-18 20:59:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 4370 transitions. [2022-11-18 20:59:03,005 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 4370 transitions. Word has length 8 [2022-11-18 20:59:03,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:03,005 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 4370 transitions. [2022-11-18 20:59:03,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 4370 transitions. [2022-11-18 20:59:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:59:03,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:03,007 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:03,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:03,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:03,227 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:03,228 INFO L85 PathProgramCache]: Analyzing trace with hash -23091308, now seen corresponding path program 2 times [2022-11-18 20:59:03,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:03,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393470761] [2022-11-18 20:59:03,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:03,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:03,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:03,231 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:03,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-18 20:59:03,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:59:03,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:59:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:59:03,544 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 20:59:03,545 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 [2022-11-18 20:59:03,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-18 20:59:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:59:03,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:59:03,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:03,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393470761] [2022-11-18 20:59:03,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393470761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:59:03,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:59:03,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:59:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257545463] [2022-11-18 20:59:03,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:59:03,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:59:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:59:03,875 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) [2022-11-18 20:59:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:04,103 INFO L93 Difference]: Finished difference Result 1065 states and 4357 transitions. [2022-11-18 20:59:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:59:04,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:59:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:04,107 INFO L225 Difference]: With dead ends: 1065 [2022-11-18 20:59:04,107 INFO L226 Difference]: Without dead ends: 1065 [2022-11-18 20:59:04,107 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 [2022-11-18 20:59:04,108 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-18 20:59:04,109 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] [2022-11-18 20:59:04,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2022-11-18 20:59:04,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1065. [2022-11-18 20:59:04,187 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) [2022-11-18 20:59:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 4357 transitions. [2022-11-18 20:59:04,209 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 4357 transitions. Word has length 9 [2022-11-18 20:59:04,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:04,211 INFO L495 AbstractCegarLoop]: Abstraction has 1065 states and 4357 transitions. [2022-11-18 20:59:04,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 4357 transitions. [2022-11-18 20:59:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:59:04,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:04,242 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:04,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:04,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:04,442 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:04,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:04,443 INFO L85 PathProgramCache]: Analyzing trace with hash -22907660, now seen corresponding path program 2 times [2022-11-18 20:59:04,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:04,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270771915] [2022-11-18 20:59:04,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:04,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:04,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:04,444 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:04,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-18 20:59:04,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:59:04,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:59:04,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:04,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:59:04,724 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 20:59:04,725 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 [2022-11-18 20:59:04,746 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 [2022-11-18 20:59:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:59:04,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:59:04,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270771915] [2022-11-18 20:59:04,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270771915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:59:04,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:59:04,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:59:04,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212431532] [2022-11-18 20:59:04,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:04,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:59:04,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:04,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:59:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:59:04,886 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) [2022-11-18 20:59:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:05,059 INFO L93 Difference]: Finished difference Result 1021 states and 4206 transitions. [2022-11-18 20:59:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:59:05,060 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 [2022-11-18 20:59:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:05,066 INFO L225 Difference]: With dead ends: 1021 [2022-11-18 20:59:05,067 INFO L226 Difference]: Without dead ends: 1021 [2022-11-18 20:59:05,067 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 [2022-11-18 20:59:05,068 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:05,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:59:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-11-18 20:59:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 670. [2022-11-18 20:59:05,099 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) [2022-11-18 20:59:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2615 transitions. [2022-11-18 20:59:05,103 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2615 transitions. Word has length 9 [2022-11-18 20:59:05,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:05,104 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 2615 transitions. [2022-11-18 20:59:05,104 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) [2022-11-18 20:59:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2615 transitions. [2022-11-18 20:59:05,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:59:05,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:05,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:05,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:05,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:05,319 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:05,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash -740412915, now seen corresponding path program 1 times [2022-11-18 20:59:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:05,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391223736] [2022-11-18 20:59:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:05,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:05,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:05,322 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:05,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-18 20:59:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:05,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:59:05,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:05,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:59:05,470 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391223736] [2022-11-18 20:59:05,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391223736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:59:05,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:59:05,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:59:05,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404731957] [2022-11-18 20:59:05,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:05,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:59:05,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:05,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:59:05,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:59:05,472 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) [2022-11-18 20:59:05,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:05,628 INFO L93 Difference]: Finished difference Result 510 states and 1883 transitions. [2022-11-18 20:59:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:59:05,629 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 [2022-11-18 20:59:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:05,631 INFO L225 Difference]: With dead ends: 510 [2022-11-18 20:59:05,631 INFO L226 Difference]: Without dead ends: 510 [2022-11-18 20:59:05,632 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 [2022-11-18 20:59:05,633 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 [2022-11-18 20:59:05,633 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] [2022-11-18 20:59:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-11-18 20:59:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-11-18 20:59:05,659 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) [2022-11-18 20:59:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1883 transitions. [2022-11-18 20:59:05,662 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1883 transitions. Word has length 9 [2022-11-18 20:59:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:05,663 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 1883 transitions. [2022-11-18 20:59:05,663 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) [2022-11-18 20:59:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1883 transitions. [2022-11-18 20:59:05,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:59:05,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:05,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:05,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:05,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:05,879 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:05,879 INFO L85 PathProgramCache]: Analyzing trace with hash -740587394, now seen corresponding path program 1 times [2022-11-18 20:59:05,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:05,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821210931] [2022-11-18 20:59:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:05,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:05,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:05,882 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:05,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-18 20:59:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:06,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:06,221 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:06,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:06,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:07,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821210931] [2022-11-18 20:59:07,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821210931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:07,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:07,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032332064] [2022-11-18 20:59:07,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:07,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:07,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:07,062 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) [2022-11-18 20:59:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:07,619 INFO L93 Difference]: Finished difference Result 512 states and 1891 transitions. [2022-11-18 20:59:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:59:07,621 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 [2022-11-18 20:59:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:07,623 INFO L225 Difference]: With dead ends: 512 [2022-11-18 20:59:07,623 INFO L226 Difference]: Without dead ends: 512 [2022-11-18 20:59:07,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:59:07,624 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-11-18 20:59:07,625 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] [2022-11-18 20:59:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-18 20:59:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-11-18 20:59:07,638 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) [2022-11-18 20:59:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1891 transitions. [2022-11-18 20:59:07,641 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1891 transitions. Word has length 9 [2022-11-18 20:59:07,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:07,642 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 1891 transitions. [2022-11-18 20:59:07,642 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) [2022-11-18 20:59:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1891 transitions. [2022-11-18 20:59:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:59:07,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:07,643 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:07,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:07,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:07,857 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:07,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:07,858 INFO L85 PathProgramCache]: Analyzing trace with hash -715830558, now seen corresponding path program 2 times [2022-11-18 20:59:07,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:07,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280351659] [2022-11-18 20:59:07,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:07,858 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:07,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:07,862 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:07,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-18 20:59:08,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:59:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:59:08,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:59:08,193 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-18 20:59:08,193 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 [2022-11-18 20:59:08,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-18 20:59:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:59:08,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:59:08,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:08,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280351659] [2022-11-18 20:59:08,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280351659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:59:08,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:59:08,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:59:08,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945234759] [2022-11-18 20:59:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:08,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:59:08,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:08,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:59:08,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:59:08,516 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) [2022-11-18 20:59:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:08,615 INFO L93 Difference]: Finished difference Result 511 states and 1890 transitions. [2022-11-18 20:59:08,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:59:08,616 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 [2022-11-18 20:59:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:08,618 INFO L225 Difference]: With dead ends: 511 [2022-11-18 20:59:08,618 INFO L226 Difference]: Without dead ends: 511 [2022-11-18 20:59:08,618 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 [2022-11-18 20:59:08,618 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 [2022-11-18 20:59:08,619 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] [2022-11-18 20:59:08,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-18 20:59:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 503. [2022-11-18 20:59:08,630 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) [2022-11-18 20:59:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1871 transitions. [2022-11-18 20:59:08,633 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1871 transitions. Word has length 10 [2022-11-18 20:59:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:08,634 INFO L495 AbstractCegarLoop]: Abstraction has 503 states and 1871 transitions. [2022-11-18 20:59:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:59:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1871 transitions. [2022-11-18 20:59:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:59:08,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:08,635 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:08,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-18 20:59:08,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:08,848 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1641026940, now seen corresponding path program 2 times [2022-11-18 20:59:08,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:08,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324930095] [2022-11-18 20:59:08,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:08,849 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:08,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:08,850 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:08,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-18 20:59:09,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:59:09,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:59:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:09,162 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:09,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:09,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:11,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:11,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324930095] [2022-11-18 20:59:11,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324930095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:11,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:11,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 20:59:11,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296294531] [2022-11-18 20:59:11,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:11,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:59:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:11,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:59:11,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:59:11,251 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) [2022-11-18 20:59:26,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:26,122 INFO L93 Difference]: Finished difference Result 1692 states and 5884 transitions. [2022-11-18 20:59:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:59:26,125 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 [2022-11-18 20:59:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:26,129 INFO L225 Difference]: With dead ends: 1692 [2022-11-18 20:59:26,129 INFO L226 Difference]: Without dead ends: 1692 [2022-11-18 20:59:26,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=279, Invalid=651, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:59:26,130 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 489 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s 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, 10.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:26,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 141 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-18 20:59:26,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-11-18 20:59:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 821. [2022-11-18 20:59:26,165 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) [2022-11-18 20:59:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 3045 transitions. [2022-11-18 20:59:26,169 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 3045 transitions. Word has length 10 [2022-11-18 20:59:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:26,170 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 3045 transitions. [2022-11-18 20:59:26,170 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) [2022-11-18 20:59:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 3045 transitions. [2022-11-18 20:59:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:59:26,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:26,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:26,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:26,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:26,386 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1477994500, now seen corresponding path program 1 times [2022-11-18 20:59:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:26,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227170527] [2022-11-18 20:59:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:26,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:26,389 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:26,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-18 20:59:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:26,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:26,691 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:26,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:27,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:27,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:27,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227170527] [2022-11-18 20:59:27,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227170527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:27,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:27,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:27,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875043345] [2022-11-18 20:59:27,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:27,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:27,615 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) [2022-11-18 20:59:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:28,188 INFO L93 Difference]: Finished difference Result 845 states and 3135 transitions. [2022-11-18 20:59:28,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:59:28,189 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 [2022-11-18 20:59:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:28,191 INFO L225 Difference]: With dead ends: 845 [2022-11-18 20:59:28,191 INFO L226 Difference]: Without dead ends: 845 [2022-11-18 20:59:28,191 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 [2022-11-18 20:59:28,192 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:28,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-11-18 20:59:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-18 20:59:28,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 833. [2022-11-18 20:59:28,225 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) [2022-11-18 20:59:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 3093 transitions. [2022-11-18 20:59:28,229 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 3093 transitions. Word has length 10 [2022-11-18 20:59:28,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:28,230 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 3093 transitions. [2022-11-18 20:59:28,230 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) [2022-11-18 20:59:28,230 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 3093 transitions. [2022-11-18 20:59:28,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:59:28,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:28,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:28,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:28,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:28,446 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:28,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1477967732, now seen corresponding path program 1 times [2022-11-18 20:59:28,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:28,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321249184] [2022-11-18 20:59:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:28,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:28,448 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:28,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-18 20:59:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:28,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:59:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:28,765 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:28,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:29,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:30,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:30,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321249184] [2022-11-18 20:59:30,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321249184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:30,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:30,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:30,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042073606] [2022-11-18 20:59:30,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:30,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:30,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:30,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:30,062 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) [2022-11-18 20:59:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:30,818 INFO L93 Difference]: Finished difference Result 860 states and 3200 transitions. [2022-11-18 20:59:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:59:30,819 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 [2022-11-18 20:59:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:30,822 INFO L225 Difference]: With dead ends: 860 [2022-11-18 20:59:30,822 INFO L226 Difference]: Without dead ends: 860 [2022-11-18 20:59:30,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:59:30,823 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:30,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 20:59:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2022-11-18 20:59:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2022-11-18 20:59:30,848 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) [2022-11-18 20:59:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 3200 transitions. [2022-11-18 20:59:30,853 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 3200 transitions. Word has length 10 [2022-11-18 20:59:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:30,853 INFO L495 AbstractCegarLoop]: Abstraction has 860 states and 3200 transitions. [2022-11-18 20:59:30,854 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) [2022-11-18 20:59:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 3200 transitions. [2022-11-18 20:59:30,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:59:30,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:30,855 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:30,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-18 20:59:31,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:31,069 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:31,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1483356880, now seen corresponding path program 2 times [2022-11-18 20:59:31,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:31,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649763574] [2022-11-18 20:59:31,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:31,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:31,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:31,071 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:31,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-18 20:59:31,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:59:31,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:31,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:31,436 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:31,437 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 [2022-11-18 20:59:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:31,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:32,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:32,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649763574] [2022-11-18 20:59:32,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649763574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:32,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:32,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:32,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851435167] [2022-11-18 20:59:32,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:32,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:32,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:32,371 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) [2022-11-18 20:59:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:33,155 INFO L93 Difference]: Finished difference Result 1136 states and 4380 transitions. [2022-11-18 20:59:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:59:33,157 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 [2022-11-18 20:59:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:33,160 INFO L225 Difference]: With dead ends: 1136 [2022-11-18 20:59:33,160 INFO L226 Difference]: Without dead ends: 1136 [2022-11-18 20:59:33,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:59:33,161 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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 [2022-11-18 20:59:33,161 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] [2022-11-18 20:59:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-18 20:59:33,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1082. [2022-11-18 20:59:33,195 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) [2022-11-18 20:59:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 4248 transitions. [2022-11-18 20:59:33,201 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 4248 transitions. Word has length 10 [2022-11-18 20:59:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:33,202 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 4248 transitions. [2022-11-18 20:59:33,202 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) [2022-11-18 20:59:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 4248 transitions. [2022-11-18 20:59:33,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:59:33,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:33,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:33,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:33,419 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1483369900, now seen corresponding path program 3 times [2022-11-18 20:59:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:33,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300946013] [2022-11-18 20:59:33,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:59:33,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:33,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:33,422 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:33,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-18 20:59:33,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:59:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:33,844 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:33,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:34,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:34,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:34,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300946013] [2022-11-18 20:59:34,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300946013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:34,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:34,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:34,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752966125] [2022-11-18 20:59:34,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:34,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:34,749 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) [2022-11-18 20:59:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:35,529 INFO L93 Difference]: Finished difference Result 1190 states and 4674 transitions. [2022-11-18 20:59:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:59:35,530 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 [2022-11-18 20:59:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:35,533 INFO L225 Difference]: With dead ends: 1190 [2022-11-18 20:59:35,534 INFO L226 Difference]: Without dead ends: 1190 [2022-11-18 20:59:35,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:59:35,535 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 [2022-11-18 20:59:35,535 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] [2022-11-18 20:59:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-18 20:59:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1028. [2022-11-18 20:59:35,558 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) [2022-11-18 20:59:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3954 transitions. [2022-11-18 20:59:35,564 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3954 transitions. Word has length 10 [2022-11-18 20:59:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:35,565 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 3954 transitions. [2022-11-18 20:59:35,565 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) [2022-11-18 20:59:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3954 transitions. [2022-11-18 20:59:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:35,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:35,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:35,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-18 20:59:35,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:35,781 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:35,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -671548261, now seen corresponding path program 1 times [2022-11-18 20:59:35,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:35,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181293091] [2022-11-18 20:59:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:35,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:35,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:35,783 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:35,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-18 20:59:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:35,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:35,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:36,098 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:36,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:36,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:37,048 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:37,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181293091] [2022-11-18 20:59:37,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181293091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:37,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:37,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:37,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210430707] [2022-11-18 20:59:37,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:37,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:37,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:37,050 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) [2022-11-18 20:59:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:37,589 INFO L93 Difference]: Finished difference Result 1052 states and 4068 transitions. [2022-11-18 20:59:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:59:37,590 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 [2022-11-18 20:59:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:37,593 INFO L225 Difference]: With dead ends: 1052 [2022-11-18 20:59:37,594 INFO L226 Difference]: Without dead ends: 1052 [2022-11-18 20:59:37,594 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 [2022-11-18 20:59:37,595 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 [2022-11-18 20:59:37,595 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] [2022-11-18 20:59:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-18 20:59:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1040. [2022-11-18 20:59:37,615 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) [2022-11-18 20:59:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 4014 transitions. [2022-11-18 20:59:37,619 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 4014 transitions. Word has length 11 [2022-11-18 20:59:37,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:37,619 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 4014 transitions. [2022-11-18 20:59:37,619 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) [2022-11-18 20:59:37,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 4014 transitions. [2022-11-18 20:59:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:37,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:37,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:37,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:37,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:37,822 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash -784916191, now seen corresponding path program 2 times [2022-11-18 20:59:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:37,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1609748967] [2022-11-18 20:59:37,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:37,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:37,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:37,825 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:37,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-18 20:59:37,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:59:37,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:38,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:38,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:38,142 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:38,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:38,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:39,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1609748967] [2022-11-18 20:59:39,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1609748967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:39,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:39,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:39,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320328672] [2022-11-18 20:59:39,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:39,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:39,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:39,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:39,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:39,071 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) [2022-11-18 20:59:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:39,762 INFO L93 Difference]: Finished difference Result 1062 states and 4113 transitions. [2022-11-18 20:59:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:59:39,764 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 [2022-11-18 20:59:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:39,767 INFO L225 Difference]: With dead ends: 1062 [2022-11-18 20:59:39,767 INFO L226 Difference]: Without dead ends: 1062 [2022-11-18 20:59:39,767 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 [2022-11-18 20:59:39,768 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 [2022-11-18 20:59:39,768 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] [2022-11-18 20:59:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-11-18 20:59:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1056. [2022-11-18 20:59:39,787 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) [2022-11-18 20:59:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 4086 transitions. [2022-11-18 20:59:39,793 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 4086 transitions. Word has length 11 [2022-11-18 20:59:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:39,793 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 4086 transitions. [2022-11-18 20:59:39,793 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) [2022-11-18 20:59:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 4086 transitions. [2022-11-18 20:59:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:39,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:39,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:39,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:40,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:40,010 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:40,011 INFO L85 PathProgramCache]: Analyzing trace with hash -784907821, now seen corresponding path program 3 times [2022-11-18 20:59:40,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:40,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401941653] [2022-11-18 20:59:40,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:59:40,012 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 [2022-11-18 20:59:40,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:40,014 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:40,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-18 20:59:40,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:59:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:40,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:40,395 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:40,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:40,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:41,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:41,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401941653] [2022-11-18 20:59:41,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401941653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:41,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:41,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:41,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703477901] [2022-11-18 20:59:41,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:41,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:41,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:41,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:41,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:41,364 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) [2022-11-18 20:59:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:41,922 INFO L93 Difference]: Finished difference Result 1086 states and 4235 transitions. [2022-11-18 20:59:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:59:41,923 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 [2022-11-18 20:59:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:41,926 INFO L225 Difference]: With dead ends: 1086 [2022-11-18 20:59:41,927 INFO L226 Difference]: Without dead ends: 1086 [2022-11-18 20:59:41,927 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 [2022-11-18 20:59:41,927 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-11-18 20:59:41,928 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] [2022-11-18 20:59:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-18 20:59:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1070. [2022-11-18 20:59:41,946 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) [2022-11-18 20:59:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 4162 transitions. [2022-11-18 20:59:41,949 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 4162 transitions. Word has length 11 [2022-11-18 20:59:41,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:41,950 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 4162 transitions. [2022-11-18 20:59:41,950 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) [2022-11-18 20:59:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 4162 transitions. [2022-11-18 20:59:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:41,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:41,951 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:41,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-18 20:59:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:42,151 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:42,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:42,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1426813156, now seen corresponding path program 4 times [2022-11-18 20:59:42,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:42,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267548085] [2022-11-18 20:59:42,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:59:42,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:42,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:42,154 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:42,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-18 20:59:42,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:59:42,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:42,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:59:42,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:42,519 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:42,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:42,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:43,721 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:43,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267548085] [2022-11-18 20:59:43,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267548085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:43,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:43,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-18 20:59:43,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403319027] [2022-11-18 20:59:43,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:43,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:59:43,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:43,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:59:43,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:59:43,723 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) [2022-11-18 20:59:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:44,625 INFO L93 Difference]: Finished difference Result 1058 states and 4112 transitions. [2022-11-18 20:59:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:59:44,626 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 [2022-11-18 20:59:44,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:44,629 INFO L225 Difference]: With dead ends: 1058 [2022-11-18 20:59:44,630 INFO L226 Difference]: Without dead ends: 1058 [2022-11-18 20:59:44,630 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 [2022-11-18 20:59:44,631 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 [2022-11-18 20:59:44,631 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] [2022-11-18 20:59:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-11-18 20:59:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1058. [2022-11-18 20:59:44,653 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) [2022-11-18 20:59:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 4112 transitions. [2022-11-18 20:59:44,659 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 4112 transitions. Word has length 11 [2022-11-18 20:59:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:44,659 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 4112 transitions. [2022-11-18 20:59:44,659 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) [2022-11-18 20:59:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 4112 transitions. [2022-11-18 20:59:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:44,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:44,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:44,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:44,876 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1426679577, now seen corresponding path program 1 times [2022-11-18 20:59:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:44,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598299192] [2022-11-18 20:59:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:44,879 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-18 20:59:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:45,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:45,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:45,223 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:45,224 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 [2022-11-18 20:59:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:45,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:46,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:46,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598299192] [2022-11-18 20:59:46,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598299192] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:46,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:46,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:46,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962266408] [2022-11-18 20:59:46,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:46,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:46,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:46,122 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) [2022-11-18 20:59:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:46,689 INFO L93 Difference]: Finished difference Result 1082 states and 4240 transitions. [2022-11-18 20:59:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:59:46,691 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 [2022-11-18 20:59:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:46,695 INFO L225 Difference]: With dead ends: 1082 [2022-11-18 20:59:46,695 INFO L226 Difference]: Without dead ends: 1082 [2022-11-18 20:59:46,695 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 [2022-11-18 20:59:46,696 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 [2022-11-18 20:59:46,696 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] [2022-11-18 20:59:46,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-11-18 20:59:46,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1078. [2022-11-18 20:59:46,721 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) [2022-11-18 20:59:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 4224 transitions. [2022-11-18 20:59:46,727 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 4224 transitions. Word has length 11 [2022-11-18 20:59:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:46,727 INFO L495 AbstractCegarLoop]: Abstraction has 1078 states and 4224 transitions. [2022-11-18 20:59:46,728 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) [2022-11-18 20:59:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 4224 transitions. [2022-11-18 20:59:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:46,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:46,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:46,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:46,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:46,942 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:46,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1427774977, now seen corresponding path program 1 times [2022-11-18 20:59:46,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:46,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1907404241] [2022-11-18 20:59:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:46,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:46,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:46,945 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:46,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-18 20:59:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:47,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:59:47,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:47,276 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:47,276 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 [2022-11-18 20:59:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:47,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:48,488 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:48,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1907404241] [2022-11-18 20:59:48,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1907404241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:48,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:48,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146978413] [2022-11-18 20:59:48,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:48,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:48,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:48,491 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) [2022-11-18 20:59:49,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:49,360 INFO L93 Difference]: Finished difference Result 1150 states and 4580 transitions. [2022-11-18 20:59:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:59:49,361 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 [2022-11-18 20:59:49,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:49,364 INFO L225 Difference]: With dead ends: 1150 [2022-11-18 20:59:49,364 INFO L226 Difference]: Without dead ends: 1150 [2022-11-18 20:59:49,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:59:49,365 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:49,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-11-18 20:59:49,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-11-18 20:59:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2022-11-18 20:59:49,385 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) [2022-11-18 20:59:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 4580 transitions. [2022-11-18 20:59:49,389 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 4580 transitions. Word has length 11 [2022-11-18 20:59:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:49,390 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 4580 transitions. [2022-11-18 20:59:49,390 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) [2022-11-18 20:59:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 4580 transitions. [2022-11-18 20:59:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:49,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:49,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:49,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-18 20:59:49,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:49,592 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1427643847, now seen corresponding path program 2 times [2022-11-18 20:59:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:49,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563401419] [2022-11-18 20:59:49,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:49,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:49,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:49,594 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:49,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-18 20:59:49,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:59:49,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:59:49,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:49,921 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:49,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:50,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:59:50,208 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:50,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563401419] [2022-11-18 20:59:50,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563401419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:59:50,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:59:50,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:59:50,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403932270] [2022-11-18 20:59:50,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:59:50,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:59:50,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:50,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:59:50,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:59:50,212 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) [2022-11-18 20:59:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:50,670 INFO L93 Difference]: Finished difference Result 1331 states and 5232 transitions. [2022-11-18 20:59:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:59:50,672 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 [2022-11-18 20:59:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:50,676 INFO L225 Difference]: With dead ends: 1331 [2022-11-18 20:59:50,676 INFO L226 Difference]: Without dead ends: 1331 [2022-11-18 20:59:50,676 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 [2022-11-18 20:59:50,677 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:50,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 6 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:59:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-11-18 20:59:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1236. [2022-11-18 20:59:50,699 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) [2022-11-18 20:59:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 4833 transitions. [2022-11-18 20:59:50,703 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 4833 transitions. Word has length 11 [2022-11-18 20:59:50,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:50,703 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 4833 transitions. [2022-11-18 20:59:50,703 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) [2022-11-18 20:59:50,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 4833 transitions. [2022-11-18 20:59:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:50,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:50,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:50,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:50,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:50,907 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:50,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1427644591, now seen corresponding path program 1 times [2022-11-18 20:59:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:50,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613489870] [2022-11-18 20:59:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:59:50,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:50,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:50,909 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:50,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-18 20:59:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:59:51,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:59:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:51,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:51,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:51,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613489870] [2022-11-18 20:59:51,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613489870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:51,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:51,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:59:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131205932] [2022-11-18 20:59:51,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:51,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:59:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:59:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:59:51,713 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) [2022-11-18 20:59:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:53,072 INFO L93 Difference]: Finished difference Result 1316 states and 4941 transitions. [2022-11-18 20:59:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:59:53,073 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 [2022-11-18 20:59:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:53,076 INFO L225 Difference]: With dead ends: 1316 [2022-11-18 20:59:53,077 INFO L226 Difference]: Without dead ends: 1316 [2022-11-18 20:59:53,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:59:53,078 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 157 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:53,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 41 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 69 Unchecked, 1.1s Time] [2022-11-18 20:59:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2022-11-18 20:59:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1287. [2022-11-18 20:59:53,118 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) [2022-11-18 20:59:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4887 transitions. [2022-11-18 20:59:53,124 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4887 transitions. Word has length 11 [2022-11-18 20:59:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:53,124 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 4887 transitions. [2022-11-18 20:59:53,124 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) [2022-11-18 20:59:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4887 transitions. [2022-11-18 20:59:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:59:53,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:53,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:59:53,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-18 20:59:53,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:53,327 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1427630967, now seen corresponding path program 2 times [2022-11-18 20:59:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67441174] [2022-11-18 20:59:53,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:59:53,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:53,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:53,330 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:53,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-18 20:59:53,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:59:53,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:59:53,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:53,704 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:53,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:59:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:54,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:59:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:59:54,687 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:59:54,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67441174] [2022-11-18 20:59:54,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67441174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:59:54,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:59:54,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:59:54,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282854410] [2022-11-18 20:59:54,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:59:54,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:59:54,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:59:54,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:59:54,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:59:54,689 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) [2022-11-18 20:59:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:59:55,243 INFO L93 Difference]: Finished difference Result 1315 states and 5023 transitions. [2022-11-18 20:59:55,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:59:55,244 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 [2022-11-18 20:59:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:59:55,262 INFO L225 Difference]: With dead ends: 1315 [2022-11-18 20:59:55,262 INFO L226 Difference]: Without dead ends: 1315 [2022-11-18 20:59:55,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:59:55,263 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:59:55,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 26 Unchecked, 0.5s Time] [2022-11-18 20:59:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-18 20:59:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1303. [2022-11-18 20:59:55,285 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) [2022-11-18 20:59:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4963 transitions. [2022-11-18 20:59:55,289 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4963 transitions. Word has length 11 [2022-11-18 20:59:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:59:55,289 INFO L495 AbstractCegarLoop]: Abstraction has 1303 states and 4963 transitions. [2022-11-18 20:59:55,289 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) [2022-11-18 20:59:55,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4963 transitions. [2022-11-18 20:59:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:59:55,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:59:55,291 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 20:59:55,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-18 20:59:55,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:59:55,491 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 20:59:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:59:55,492 INFO L85 PathProgramCache]: Analyzing trace with hash 417008356, now seen corresponding path program 3 times [2022-11-18 20:59:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:59:55,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510890123] [2022-11-18 20:59:55,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:59:55,492 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 [2022-11-18 20:59:55,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:59:55,493 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:59:55,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-18 20:59:55,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:59:55,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:59:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:59:55,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:59:56,046 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:59:56,046 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 [2022-11-18 20:59:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:59:56,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:00,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510890123] [2022-11-18 21:00:00,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510890123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:00,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:00,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-18 21:00:00,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110484766] [2022-11-18 21:00:00,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:00,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 21:00:00,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:00,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 21:00:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:00:00,040 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) [2022-11-18 21:00:26,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:26,807 INFO L93 Difference]: Finished difference Result 14485 states and 56715 transitions. [2022-11-18 21:00:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 21:00:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 21:00:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:26,857 INFO L225 Difference]: With dead ends: 14485 [2022-11-18 21:00:26,857 INFO L226 Difference]: Without dead ends: 14485 [2022-11-18 21:00:26,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 21:00:26,858 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4095 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3003 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s 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, 13.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:26,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4095 Valid, 360 Invalid, 3025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3003 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-11-18 21:00:26,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14485 states. [2022-11-18 21:00:27,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14485 to 1315. [2022-11-18 21:00:27,026 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) [2022-11-18 21:00:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 4987 transitions. [2022-11-18 21:00:27,031 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 4987 transitions. Word has length 12 [2022-11-18 21:00:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:27,031 INFO L495 AbstractCegarLoop]: Abstraction has 1315 states and 4987 transitions. [2022-11-18 21:00:27,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 4987 transitions. [2022-11-18 21:00:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:00:27,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:27,033 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1] [2022-11-18 21:00:27,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:27,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:27,248 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:00:27,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:27,249 INFO L85 PathProgramCache]: Analyzing trace with hash -402760063, now seen corresponding path program 3 times [2022-11-18 21:00:27,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:27,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092553583] [2022-11-18 21:00:27,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:00:27,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:27,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:27,251 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:27,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-18 21:00:27,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 21:00:27,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:00:27,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:27,768 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:27,769 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 [2022-11-18 21:00:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 21:00:28,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:28,246 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 [2022-11-18 21:00:28,268 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:00:28,272 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:00:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 21:00:29,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:29,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092553583] [2022-11-18 21:00:29,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092553583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:29,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:29,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 21:00:29,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43771432] [2022-11-18 21:00:29,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:29,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:00:29,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:00:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:00:29,241 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) [2022-11-18 21:00:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:34,286 INFO L93 Difference]: Finished difference Result 1410 states and 5209 transitions. [2022-11-18 21:00:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 21:00:34,287 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 [2022-11-18 21:00:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:34,290 INFO L225 Difference]: With dead ends: 1410 [2022-11-18 21:00:34,291 INFO L226 Difference]: Without dead ends: 1410 [2022-11-18 21:00:34,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:00:34,291 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:34,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 74 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 463 Invalid, 0 Unknown, 41 Unchecked, 3.9s Time] [2022-11-18 21:00:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2022-11-18 21:00:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1320. [2022-11-18 21:00:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1306 states have (on average 3.826186830015314) internal successors, (4997), 1319 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 4997 transitions. [2022-11-18 21:00:34,319 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 4997 transitions. Word has length 12 [2022-11-18 21:00:34,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:34,319 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 4997 transitions. [2022-11-18 21:00:34,319 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) [2022-11-18 21:00:34,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 4997 transitions. [2022-11-18 21:00:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:00:34,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:34,321 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:34,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-18 21:00:34,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:34,521 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:00:34,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1691818127, now seen corresponding path program 3 times [2022-11-18 21:00:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:34,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291271865] [2022-11-18 21:00:34,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:00:34,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:34,523 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:34,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-18 21:00:34,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:00:34,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 21:00:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:34,924 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 21:00:34,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-18 21:00:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:35,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:35,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291271865] [2022-11-18 21:00:35,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291271865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:35,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:35,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 21:00:35,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962734594] [2022-11-18 21:00:35,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:35,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:00:35,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:35,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:00:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:00:35,924 INFO L87 Difference]: Start difference. First operand 1320 states and 4997 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) [2022-11-18 21:00:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:37,756 INFO L93 Difference]: Finished difference Result 1810 states and 6565 transitions. [2022-11-18 21:00:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:00:37,757 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 [2022-11-18 21:00:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:37,761 INFO L225 Difference]: With dead ends: 1810 [2022-11-18 21:00:37,761 INFO L226 Difference]: Without dead ends: 1810 [2022-11-18 21:00:37,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-18 21:00:37,762 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:37,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 57 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 21:00:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-11-18 21:00:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1448. [2022-11-18 21:00:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1434 states have (on average 3.890516039051604) internal successors, (5579), 1447 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 5579 transitions. [2022-11-18 21:00:37,811 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 5579 transitions. Word has length 12 [2022-11-18 21:00:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:37,812 INFO L495 AbstractCegarLoop]: Abstraction has 1448 states and 5579 transitions. [2022-11-18 21:00:37,812 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) [2022-11-18 21:00:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 5579 transitions. [2022-11-18 21:00:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:00:37,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:37,813 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:37,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-18 21:00:38,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:38,013 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:00:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:38,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1692653871, now seen corresponding path program 2 times [2022-11-18 21:00:38,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:38,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529652408] [2022-11-18 21:00:38,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:00:38,015 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 [2022-11-18 21:00:38,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:38,016 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:38,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-18 21:00:38,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:00:38,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:00:38,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:38,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:38,457 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 [2022-11-18 21:00:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:39,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:41,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:41,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529652408] [2022-11-18 21:00:41,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529652408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:41,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:41,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 21:00:41,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567473239] [2022-11-18 21:00:41,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:41,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:00:41,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:00:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:00:41,381 INFO L87 Difference]: Start difference. First operand 1448 states and 5579 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) [2022-11-18 21:00:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:50,640 INFO L93 Difference]: Finished difference Result 3643 states and 14943 transitions. [2022-11-18 21:00:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:00:50,642 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 [2022-11-18 21:00:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:50,653 INFO L225 Difference]: With dead ends: 3643 [2022-11-18 21:00:50,653 INFO L226 Difference]: Without dead ends: 3643 [2022-11-18 21:00:50,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:00:50,654 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 453 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:50,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 86 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 554 Invalid, 0 Unknown, 195 Unchecked, 2.9s Time] [2022-11-18 21:00:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3643 states. [2022-11-18 21:00:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3643 to 2513. [2022-11-18 21:00:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2499 states have (on average 4.1340536214485795) internal successors, (10331), 2512 states have internal predecessors, (10331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:50,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 10331 transitions. [2022-11-18 21:00:50,779 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 10331 transitions. Word has length 12 [2022-11-18 21:00:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:50,780 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 10331 transitions. [2022-11-18 21:00:50,780 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) [2022-11-18 21:00:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 10331 transitions. [2022-11-18 21:00:50,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:00:50,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:50,782 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:50,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:50,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:50,997 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:00:50,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1525171582, now seen corresponding path program 2 times [2022-11-18 21:00:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:50,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076948126] [2022-11-18 21:00:50,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:00:50,999 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 [2022-11-18 21:00:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:51,000 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:51,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-18 21:00:51,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:00:51,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:00:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:51,410 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:51,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:52,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:00:53,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:53,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076948126] [2022-11-18 21:00:53,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076948126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:53,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:53,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 21:00:53,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17810087] [2022-11-18 21:00:53,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 21:00:53,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 21:00:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:00:53,809 INFO L87 Difference]: Start difference. First operand 2513 states and 10331 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) [2022-11-18 21:00:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:55,372 INFO L93 Difference]: Finished difference Result 2569 states and 10504 transitions. [2022-11-18 21:00:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:00:55,373 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 [2022-11-18 21:00:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:55,380 INFO L225 Difference]: With dead ends: 2569 [2022-11-18 21:00:55,381 INFO L226 Difference]: Without dead ends: 2569 [2022-11-18 21:00:55,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:00:55,381 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:55,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 84 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 130 Unchecked, 0.5s Time] [2022-11-18 21:00:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2022-11-18 21:00:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2545. [2022-11-18 21:00:55,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2531 states have (on average 4.132358751481628) internal successors, (10459), 2544 states have internal predecessors, (10459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 10459 transitions. [2022-11-18 21:00:55,467 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 10459 transitions. Word has length 12 [2022-11-18 21:00:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:55,468 INFO L495 AbstractCegarLoop]: Abstraction has 2545 states and 10459 transitions. [2022-11-18 21:00:55,468 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) [2022-11-18 21:00:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 10459 transitions. [2022-11-18 21:00:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:00:55,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:55,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:55,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:55,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:55,685 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:00:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash 226257129, now seen corresponding path program 1 times [2022-11-18 21:00:55,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:55,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740374339] [2022-11-18 21:00:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:55,686 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:55,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:55,688 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:55,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-18 21:00:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:55,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:00:55,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:56,082 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:56,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:00:56,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:00:57,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:57,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740374339] [2022-11-18 21:00:57,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740374339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:57,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:57,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:00:57,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996529188] [2022-11-18 21:00:57,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:57,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:00:57,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:00:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:00:57,227 INFO L87 Difference]: Start difference. First operand 2545 states and 10459 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) [2022-11-18 21:00:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:57,884 INFO L93 Difference]: Finished difference Result 2592 states and 10675 transitions. [2022-11-18 21:00:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:00:57,886 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 [2022-11-18 21:00:57,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:57,894 INFO L225 Difference]: With dead ends: 2592 [2022-11-18 21:00:57,894 INFO L226 Difference]: Without dead ends: 2592 [2022-11-18 21:00:57,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:00:57,895 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:57,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 24 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 26 Unchecked, 0.6s Time] [2022-11-18 21:00:57,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-11-18 21:00:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2547. [2022-11-18 21:00:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2533 states have (on average 4.131464666403474) internal successors, (10465), 2546 states have internal predecessors, (10465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 10465 transitions. [2022-11-18 21:00:57,992 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 10465 transitions. Word has length 12 [2022-11-18 21:00:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:57,993 INFO L495 AbstractCegarLoop]: Abstraction has 2547 states and 10465 transitions. [2022-11-18 21:00:57,993 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) [2022-11-18 21:00:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 10465 transitions. [2022-11-18 21:00:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:00:57,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:57,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:58,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:58,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:58,210 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:00:58,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:58,211 INFO L85 PathProgramCache]: Analyzing trace with hash 662218623, now seen corresponding path program 1 times [2022-11-18 21:00:58,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:58,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122068581] [2022-11-18 21:00:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:58,212 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 [2022-11-18 21:00:58,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:58,213 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:00:58,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-18 21:00:58,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:00:58,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:58,568 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:58,568 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 [2022-11-18 21:00:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:00:58,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:00:59,587 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:59,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122068581] [2022-11-18 21:00:59,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1122068581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:59,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:59,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:00:59,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279962451] [2022-11-18 21:00:59,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:59,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:00:59,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:00:59,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:00:59,589 INFO L87 Difference]: Start difference. First operand 2547 states and 10465 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) [2022-11-18 21:01:00,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:00,139 INFO L93 Difference]: Finished difference Result 2635 states and 10909 transitions. [2022-11-18 21:01:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:00,141 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 [2022-11-18 21:01:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:00,149 INFO L225 Difference]: With dead ends: 2635 [2022-11-18 21:01:00,149 INFO L226 Difference]: Without dead ends: 2635 [2022-11-18 21:01:00,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:00,149 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:00,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-11-18 21:01:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-11-18 21:01:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2549. [2022-11-18 21:01:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2535 states have (on average 4.131360946745562) internal successors, (10473), 2548 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 10473 transitions. [2022-11-18 21:01:00,225 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 10473 transitions. Word has length 12 [2022-11-18 21:01:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:00,225 INFO L495 AbstractCegarLoop]: Abstraction has 2549 states and 10473 transitions. [2022-11-18 21:01:00,225 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) [2022-11-18 21:01:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 10473 transitions. [2022-11-18 21:01:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:00,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:00,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:00,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:00,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:00,442 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:00,443 INFO L85 PathProgramCache]: Analyzing trace with hash 656856243, now seen corresponding path program 2 times [2022-11-18 21:01:00,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:00,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63195201] [2022-11-18 21:01:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:01:00,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:00,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:00,445 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:00,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-18 21:01:00,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:01:00,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:00,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:00,908 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:00,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:01,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:01,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:01,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63195201] [2022-11-18 21:01:01,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63195201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:01,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:01,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:01,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621536876] [2022-11-18 21:01:01,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:01,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:01,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:01,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:01,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:01,960 INFO L87 Difference]: Start difference. First operand 2549 states and 10473 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) [2022-11-18 21:01:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:02,617 INFO L93 Difference]: Finished difference Result 2705 states and 11258 transitions. [2022-11-18 21:01:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:01:02,618 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 [2022-11-18 21:01:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:02,626 INFO L225 Difference]: With dead ends: 2705 [2022-11-18 21:01:02,626 INFO L226 Difference]: Without dead ends: 2705 [2022-11-18 21:01:02,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:02,627 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:02,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 25 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 29 Unchecked, 0.6s Time] [2022-11-18 21:01:02,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2022-11-18 21:01:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2617. [2022-11-18 21:01:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2603 states have (on average 4.158663081060315) internal successors, (10825), 2616 states have internal predecessors, (10825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 10825 transitions. [2022-11-18 21:01:02,713 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 10825 transitions. Word has length 12 [2022-11-18 21:01:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:02,713 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 10825 transitions. [2022-11-18 21:01:02,713 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) [2022-11-18 21:01:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 10825 transitions. [2022-11-18 21:01:02,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:02,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:02,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:02,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:02,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:02,922 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash 656843223, now seen corresponding path program 3 times [2022-11-18 21:01:02,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:02,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736533739] [2022-11-18 21:01:02,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:01:02,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:02,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:02,925 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:02,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-18 21:01:03,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:01:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:03,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:03,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:03,343 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:03,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:03,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:04,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:04,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736533739] [2022-11-18 21:01:04,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736533739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:04,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:04,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:04,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735029622] [2022-11-18 21:01:04,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:04,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:04,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:04,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:04,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:04,385 INFO L87 Difference]: Start difference. First operand 2617 states and 10825 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) [2022-11-18 21:01:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:05,216 INFO L93 Difference]: Finished difference Result 3301 states and 14561 transitions. [2022-11-18 21:01:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:05,217 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 [2022-11-18 21:01:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:05,227 INFO L225 Difference]: With dead ends: 3301 [2022-11-18 21:01:05,228 INFO L226 Difference]: Without dead ends: 3301 [2022-11-18 21:01:05,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:05,228 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 33 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:05,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 51 Unchecked, 0.7s Time] [2022-11-18 21:01:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2022-11-18 21:01:05,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2889. [2022-11-18 21:01:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2889 states, 2875 states have (on average 4.302260869565218) internal successors, (12369), 2888 states have internal predecessors, (12369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2889 states to 2889 states and 12369 transitions. [2022-11-18 21:01:05,344 INFO L78 Accepts]: Start accepts. Automaton has 2889 states and 12369 transitions. Word has length 12 [2022-11-18 21:01:05,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:05,344 INFO L495 AbstractCegarLoop]: Abstraction has 2889 states and 12369 transitions. [2022-11-18 21:01:05,345 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) [2022-11-18 21:01:05,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2889 states and 12369 transitions. [2022-11-18 21:01:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:05,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:05,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:05,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:05,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:05,563 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:05,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash 656842479, now seen corresponding path program 2 times [2022-11-18 21:01:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:05,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450323797] [2022-11-18 21:01:05,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:01:05,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:05,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:05,566 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:05,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-18 21:01:05,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:01:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:05,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:05,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:05,942 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:05,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:06,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:06,988 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450323797] [2022-11-18 21:01:06,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450323797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:06,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:06,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883369119] [2022-11-18 21:01:06,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:06,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:06,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:06,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:06,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:06,990 INFO L87 Difference]: Start difference. First operand 2889 states and 12369 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) [2022-11-18 21:01:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:07,629 INFO L93 Difference]: Finished difference Result 2912 states and 12463 transitions. [2022-11-18 21:01:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:07,638 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 [2022-11-18 21:01:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:07,648 INFO L225 Difference]: With dead ends: 2912 [2022-11-18 21:01:07,648 INFO L226 Difference]: Without dead ends: 2912 [2022-11-18 21:01:07,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:07,648 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:07,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 24 Unchecked, 0.6s Time] [2022-11-18 21:01:07,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-11-18 21:01:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 2890. [2022-11-18 21:01:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2876 states have (on average 4.301808066759388) internal successors, (12372), 2889 states have internal predecessors, (12372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 12372 transitions. [2022-11-18 21:01:07,707 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 12372 transitions. Word has length 12 [2022-11-18 21:01:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:07,708 INFO L495 AbstractCegarLoop]: Abstraction has 2890 states and 12372 transitions. [2022-11-18 21:01:07,708 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) [2022-11-18 21:01:07,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 12372 transitions. [2022-11-18 21:01:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:07,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:07,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:07,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-18 21:01:07,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:07,919 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:07,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:07,920 INFO L85 PathProgramCache]: Analyzing trace with hash 656833179, now seen corresponding path program 3 times [2022-11-18 21:01:07,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640713980] [2022-11-18 21:01:07,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:01:07,920 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:07,921 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:07,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-18 21:01:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:01:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:08,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:08,307 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:08,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:08,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:09,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640713980] [2022-11-18 21:01:09,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640713980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:09,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:09,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:09,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887691930] [2022-11-18 21:01:09,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:09,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:09,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:09,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:09,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:09,368 INFO L87 Difference]: Start difference. First operand 2890 states and 12372 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) [2022-11-18 21:01:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:09,896 INFO L93 Difference]: Finished difference Result 2920 states and 12487 transitions. [2022-11-18 21:01:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:01:09,897 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 [2022-11-18 21:01:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:09,906 INFO L225 Difference]: With dead ends: 2920 [2022-11-18 21:01:09,906 INFO L226 Difference]: Without dead ends: 2920 [2022-11-18 21:01:09,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:09,907 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:09,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 21 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-18 21:01:09,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2022-11-18 21:01:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 2894. [2022-11-18 21:01:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2880 states have (on average 4.3) internal successors, (12384), 2893 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12384 transitions. [2022-11-18 21:01:10,014 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12384 transitions. Word has length 12 [2022-11-18 21:01:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:10,014 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12384 transitions. [2022-11-18 21:01:10,014 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) [2022-11-18 21:01:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12384 transitions. [2022-11-18 21:01:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:10,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:10,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:10,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:10,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:10,217 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:10,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:10,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1604055109, now seen corresponding path program 4 times [2022-11-18 21:01:10,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:10,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602211212] [2022-11-18 21:01:10,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:01:10,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:10,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:10,219 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:10,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-18 21:01:10,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:01:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:10,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:10,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:10,605 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:10,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:10,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:11,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:11,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602211212] [2022-11-18 21:01:11,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602211212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:11,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:11,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:11,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828736653] [2022-11-18 21:01:11,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:11,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:11,620 INFO L87 Difference]: Start difference. First operand 2894 states and 12384 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) [2022-11-18 21:01:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:11,919 INFO L93 Difference]: Finished difference Result 2973 states and 12783 transitions. [2022-11-18 21:01:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:11,920 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 [2022-11-18 21:01:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:11,932 INFO L225 Difference]: With dead ends: 2973 [2022-11-18 21:01:11,932 INFO L226 Difference]: Without dead ends: 2973 [2022-11-18 21:01:11,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:11,933 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:11,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 27 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-18 21:01:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-11-18 21:01:12,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2894. [2022-11-18 21:01:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2880 states have (on average 4.3) internal successors, (12384), 2893 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:12,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12384 transitions. [2022-11-18 21:01:12,072 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12384 transitions. Word has length 12 [2022-11-18 21:01:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:12,073 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12384 transitions. [2022-11-18 21:01:12,073 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) [2022-11-18 21:01:12,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12384 transitions. [2022-11-18 21:01:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:12,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:12,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:12,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-18 21:01:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:12,291 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1437812959, now seen corresponding path program 5 times [2022-11-18 21:01:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32567521] [2022-11-18 21:01:12,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:01:12,292 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 [2022-11-18 21:01:12,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:12,293 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:12,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-18 21:01:12,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:01:12,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:12,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:01:12,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:12,681 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:12,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:13,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:13,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:13,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32567521] [2022-11-18 21:01:13,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32567521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:13,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:13,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:01:13,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105955534] [2022-11-18 21:01:13,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:13,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:01:13,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:13,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:01:13,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:01:13,988 INFO L87 Difference]: Start difference. First operand 2894 states and 12384 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) [2022-11-18 21:01:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:14,874 INFO L93 Difference]: Finished difference Result 3415 states and 14907 transitions. [2022-11-18 21:01:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:01:14,875 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 [2022-11-18 21:01:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:14,889 INFO L225 Difference]: With dead ends: 3415 [2022-11-18 21:01:14,890 INFO L226 Difference]: Without dead ends: 3415 [2022-11-18 21:01:14,890 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 [2022-11-18 21:01:14,890 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:14,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 31 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 160 Unchecked, 0.8s Time] [2022-11-18 21:01:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2022-11-18 21:01:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 2894. [2022-11-18 21:01:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2880 states have (on average 4.3) internal successors, (12384), 2893 states have internal predecessors, (12384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 12384 transitions. [2022-11-18 21:01:14,977 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 12384 transitions. Word has length 12 [2022-11-18 21:01:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:14,978 INFO L495 AbstractCegarLoop]: Abstraction has 2894 states and 12384 transitions. [2022-11-18 21:01:14,978 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) [2022-11-18 21:01:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 12384 transitions. [2022-11-18 21:01:14,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:14,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:14,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:14,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:15,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:15,195 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:15,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:15,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1437821329, now seen corresponding path program 6 times [2022-11-18 21:01:15,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:15,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768250725] [2022-11-18 21:01:15,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:01:15,196 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 [2022-11-18 21:01:15,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:15,197 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:15,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-18 21:01:15,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:01:15,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:15,615 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:15,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:15,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:16,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:16,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768250725] [2022-11-18 21:01:16,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768250725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:16,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:16,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:16,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093001088] [2022-11-18 21:01:16,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:16,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:16,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:16,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:16,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:16,692 INFO L87 Difference]: Start difference. First operand 2894 states and 12384 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) [2022-11-18 21:01:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:17,887 INFO L93 Difference]: Finished difference Result 4021 states and 17756 transitions. [2022-11-18 21:01:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:01:17,889 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 [2022-11-18 21:01:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:17,902 INFO L225 Difference]: With dead ends: 4021 [2022-11-18 21:01:17,902 INFO L226 Difference]: Without dead ends: 4021 [2022-11-18 21:01:17,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:17,903 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:17,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 22 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 202 Unchecked, 1.1s Time] [2022-11-18 21:01:17,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2022-11-18 21:01:18,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3411. [2022-11-18 21:01:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3397 states have (on average 4.446864880777157) internal successors, (15106), 3410 states have internal predecessors, (15106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 15106 transitions. [2022-11-18 21:01:18,067 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 15106 transitions. Word has length 12 [2022-11-18 21:01:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:18,068 INFO L495 AbstractCegarLoop]: Abstraction has 3411 states and 15106 transitions. [2022-11-18 21:01:18,068 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) [2022-11-18 21:01:18,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 15106 transitions. [2022-11-18 21:01:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:18,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:18,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:18,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:18,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:18,286 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:18,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:18,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1437664159, now seen corresponding path program 7 times [2022-11-18 21:01:18,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:18,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352010904] [2022-11-18 21:01:18,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:01:18,287 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 [2022-11-18 21:01:18,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:18,289 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:18,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-18 21:01:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:18,731 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:18,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:19,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:19,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352010904] [2022-11-18 21:01:19,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352010904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:19,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:19,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:19,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135284857] [2022-11-18 21:01:19,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:19,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:19,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:19,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:19,697 INFO L87 Difference]: Start difference. First operand 3411 states and 15106 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) [2022-11-18 21:01:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:20,589 INFO L93 Difference]: Finished difference Result 3842 states and 17294 transitions. [2022-11-18 21:01:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:20,591 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 [2022-11-18 21:01:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:20,606 INFO L225 Difference]: With dead ends: 3842 [2022-11-18 21:01:20,606 INFO L226 Difference]: Without dead ends: 3842 [2022-11-18 21:01:20,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:20,607 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:20,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 73 Unchecked, 0.7s Time] [2022-11-18 21:01:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3842 states. [2022-11-18 21:01:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3842 to 3403. [2022-11-18 21:01:20,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3389 states have (on average 4.444378872823842) internal successors, (15062), 3402 states have internal predecessors, (15062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 15062 transitions. [2022-11-18 21:01:20,757 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 15062 transitions. Word has length 12 [2022-11-18 21:01:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:20,758 INFO L495 AbstractCegarLoop]: Abstraction has 3403 states and 15062 transitions. [2022-11-18 21:01:20,758 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) [2022-11-18 21:01:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 15062 transitions. [2022-11-18 21:01:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:20,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:20,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:20,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:20,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:20,975 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:20,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:20,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1277379990, now seen corresponding path program 1 times [2022-11-18 21:01:20,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:20,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472073751] [2022-11-18 21:01:20,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:20,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:20,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:20,977 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:20,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-18 21:01:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:21,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:21,340 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:21,341 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 [2022-11-18 21:01:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:21,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:22,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:22,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472073751] [2022-11-18 21:01:22,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472073751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:22,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:22,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:22,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630749155] [2022-11-18 21:01:22,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:22,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:22,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:22,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:22,334 INFO L87 Difference]: Start difference. First operand 3403 states and 15062 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) [2022-11-18 21:01:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:22,998 INFO L93 Difference]: Finished difference Result 3567 states and 15806 transitions. [2022-11-18 21:01:22,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:23,000 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 [2022-11-18 21:01:23,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:23,011 INFO L225 Difference]: With dead ends: 3567 [2022-11-18 21:01:23,011 INFO L226 Difference]: Without dead ends: 3567 [2022-11-18 21:01:23,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:23,012 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:23,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 26 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 61 Unchecked, 0.6s Time] [2022-11-18 21:01:23,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2022-11-18 21:01:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3413. [2022-11-18 21:01:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3399 states have (on average 4.442483083259782) internal successors, (15100), 3412 states have internal predecessors, (15100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:23,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 15100 transitions. [2022-11-18 21:01:23,083 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 15100 transitions. Word has length 12 [2022-11-18 21:01:23,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:23,083 INFO L495 AbstractCegarLoop]: Abstraction has 3413 states and 15100 transitions. [2022-11-18 21:01:23,083 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) [2022-11-18 21:01:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 15100 transitions. [2022-11-18 21:01:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:23,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:23,085 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:23,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:23,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:23,300 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:23,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1277396327, now seen corresponding path program 4 times [2022-11-18 21:01:23,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:23,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859971696] [2022-11-18 21:01:23,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:01:23,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:23,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:23,302 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:23,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-18 21:01:23,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:01:23,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:01:23,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:23,681 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:23,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:24,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:24,929 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:24,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859971696] [2022-11-18 21:01:24,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859971696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:24,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:24,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-18 21:01:24,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599682964] [2022-11-18 21:01:24,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:01:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:01:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:01:24,931 INFO L87 Difference]: Start difference. First operand 3413 states and 15100 transitions. Second operand has 12 states, 12 states have (on average 2.0) 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) [2022-11-18 21:01:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:25,775 INFO L93 Difference]: Finished difference Result 3413 states and 15084 transitions. [2022-11-18 21:01:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 21:01:25,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) 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 [2022-11-18 21:01:25,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:25,787 INFO L225 Difference]: With dead ends: 3413 [2022-11-18 21:01:25,787 INFO L226 Difference]: Without dead ends: 3413 [2022-11-18 21:01:25,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:01:25,788 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:25,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 116 Unchecked, 0.7s Time] [2022-11-18 21:01:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2022-11-18 21:01:25,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 3413. [2022-11-18 21:01:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3399 states have (on average 4.437775816416593) internal successors, (15084), 3412 states have internal predecessors, (15084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 15084 transitions. [2022-11-18 21:01:25,866 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 15084 transitions. Word has length 12 [2022-11-18 21:01:25,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:25,867 INFO L495 AbstractCegarLoop]: Abstraction has 3413 states and 15084 transitions. [2022-11-18 21:01:25,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) 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) [2022-11-18 21:01:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 15084 transitions. [2022-11-18 21:01:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:25,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:25,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:25,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-18 21:01:26,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:26,075 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1311341730, now seen corresponding path program 2 times [2022-11-18 21:01:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:26,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220132976] [2022-11-18 21:01:26,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:01:26,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:26,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:26,077 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:26,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-18 21:01:26,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:01:26,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:26,506 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:26,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:26,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:27,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:27,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220132976] [2022-11-18 21:01:27,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220132976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:27,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:27,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:27,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152480096] [2022-11-18 21:01:27,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:27,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:27,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:27,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:27,516 INFO L87 Difference]: Start difference. First operand 3413 states and 15084 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) [2022-11-18 21:01:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:28,084 INFO L93 Difference]: Finished difference Result 3485 states and 15390 transitions. [2022-11-18 21:01:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:28,086 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 [2022-11-18 21:01:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:28,097 INFO L225 Difference]: With dead ends: 3485 [2022-11-18 21:01:28,097 INFO L226 Difference]: Without dead ends: 3485 [2022-11-18 21:01:28,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:28,098 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:28,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 43 Unchecked, 0.5s Time] [2022-11-18 21:01:28,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2022-11-18 21:01:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3443. [2022-11-18 21:01:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3429 states have (on average 4.433945756780402) internal successors, (15204), 3442 states have internal predecessors, (15204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 15204 transitions. [2022-11-18 21:01:28,169 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 15204 transitions. Word has length 12 [2022-11-18 21:01:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:28,170 INFO L495 AbstractCegarLoop]: Abstraction has 3443 states and 15204 transitions. [2022-11-18 21:01:28,170 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) [2022-11-18 21:01:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 15204 transitions. [2022-11-18 21:01:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:28,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:28,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:28,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-11-18 21:01:28,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:28,383 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1307141199, now seen corresponding path program 1 times [2022-11-18 21:01:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:28,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792809380] [2022-11-18 21:01:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:28,384 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:28,385 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:28,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-18 21:01:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:28,750 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:28,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:29,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:29,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792809380] [2022-11-18 21:01:29,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792809380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:29,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:29,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:29,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543942154] [2022-11-18 21:01:29,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:29,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:29,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:29,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:29,729 INFO L87 Difference]: Start difference. First operand 3443 states and 15204 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) [2022-11-18 21:01:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:30,296 INFO L93 Difference]: Finished difference Result 3507 states and 15514 transitions. [2022-11-18 21:01:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:30,298 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 [2022-11-18 21:01:30,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:30,312 INFO L225 Difference]: With dead ends: 3507 [2022-11-18 21:01:30,312 INFO L226 Difference]: Without dead ends: 3507 [2022-11-18 21:01:30,313 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 [2022-11-18 21:01:30,313 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:30,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 16 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 28 Unchecked, 0.5s Time] [2022-11-18 21:01:30,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-11-18 21:01:30,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3447. [2022-11-18 21:01:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3433 states have (on average 4.434605301485581) internal successors, (15224), 3446 states have internal predecessors, (15224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 15224 transitions. [2022-11-18 21:01:30,424 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 15224 transitions. Word has length 12 [2022-11-18 21:01:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:30,425 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 15224 transitions. [2022-11-18 21:01:30,425 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) [2022-11-18 21:01:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 15224 transitions. [2022-11-18 21:01:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:30,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:30,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:30,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-11-18 21:01:30,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:30,629 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1306873080, now seen corresponding path program 3 times [2022-11-18 21:01:30,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:30,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979621099] [2022-11-18 21:01:30,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:01:30,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:30,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:30,632 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:30,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-18 21:01:30,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:01:30,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:30,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:31,063 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:31,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:31,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:32,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:32,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979621099] [2022-11-18 21:01:32,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979621099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:32,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:32,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903478638] [2022-11-18 21:01:32,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:32,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:32,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:32,052 INFO L87 Difference]: Start difference. First operand 3447 states and 15224 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) [2022-11-18 21:01:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:32,637 INFO L93 Difference]: Finished difference Result 3511 states and 15494 transitions. [2022-11-18 21:01:32,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:01:32,639 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 [2022-11-18 21:01:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:32,650 INFO L225 Difference]: With dead ends: 3511 [2022-11-18 21:01:32,651 INFO L226 Difference]: Without dead ends: 3511 [2022-11-18 21:01:32,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:32,651 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:32,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-18 21:01:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2022-11-18 21:01:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 3447. [2022-11-18 21:01:32,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3433 states have (on average 4.4351878823186714) internal successors, (15226), 3446 states have internal predecessors, (15226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:32,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 15226 transitions. [2022-11-18 21:01:32,722 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 15226 transitions. Word has length 12 [2022-11-18 21:01:32,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:32,722 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 15226 transitions. [2022-11-18 21:01:32,723 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) [2022-11-18 21:01:32,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 15226 transitions. [2022-11-18 21:01:32,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:32,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:32,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:32,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-18 21:01:32,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:32,948 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:32,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1306888890, now seen corresponding path program 4 times [2022-11-18 21:01:32,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:32,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197735699] [2022-11-18 21:01:32,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:01:32,950 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:32,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:32,951 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:32,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-18 21:01:33,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:01:33,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:33,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:33,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:33,326 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:33,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:33,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:34,301 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:34,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197735699] [2022-11-18 21:01:34,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197735699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:34,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:34,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:34,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573829020] [2022-11-18 21:01:34,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:34,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:34,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:34,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:34,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:34,303 INFO L87 Difference]: Start difference. First operand 3447 states and 15226 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) [2022-11-18 21:01:34,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:34,859 INFO L93 Difference]: Finished difference Result 3489 states and 15408 transitions. [2022-11-18 21:01:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:01:34,860 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 [2022-11-18 21:01:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:34,871 INFO L225 Difference]: With dead ends: 3489 [2022-11-18 21:01:34,871 INFO L226 Difference]: Without dead ends: 3489 [2022-11-18 21:01:34,871 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 [2022-11-18 21:01:34,872 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 17 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 [2022-11-18 21:01:34,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 17 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-18 21:01:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2022-11-18 21:01:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 3445. [2022-11-18 21:01:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3431 states have (on average 4.434858641795395) internal successors, (15216), 3444 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:34,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 15216 transitions. [2022-11-18 21:01:34,941 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 15216 transitions. Word has length 12 [2022-11-18 21:01:34,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:34,942 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 15216 transitions. [2022-11-18 21:01:34,942 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) [2022-11-18 21:01:34,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 15216 transitions. [2022-11-18 21:01:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:34,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:34,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:34,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:35,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:35,158 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1306884519, now seen corresponding path program 2 times [2022-11-18 21:01:35,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:35,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301935901] [2022-11-18 21:01:35,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:01:35,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:35,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:35,161 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-18 21:01:35,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:01:35,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:35,555 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:35,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:35,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:36,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:36,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301935901] [2022-11-18 21:01:36,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301935901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:36,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:36,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:36,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058784957] [2022-11-18 21:01:36,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:36,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:36,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:36,582 INFO L87 Difference]: Start difference. First operand 3445 states and 15216 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) [2022-11-18 21:01:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:37,255 INFO L93 Difference]: Finished difference Result 3563 states and 15810 transitions. [2022-11-18 21:01:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:37,257 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 [2022-11-18 21:01:37,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:37,273 INFO L225 Difference]: With dead ends: 3563 [2022-11-18 21:01:37,273 INFO L226 Difference]: Without dead ends: 3563 [2022-11-18 21:01:37,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:37,274 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:37,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 57 Unchecked, 0.6s Time] [2022-11-18 21:01:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2022-11-18 21:01:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3509. [2022-11-18 21:01:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3495 states have (on average 4.447496423462089) internal successors, (15544), 3508 states have internal predecessors, (15544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 15544 transitions. [2022-11-18 21:01:37,365 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 15544 transitions. Word has length 12 [2022-11-18 21:01:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:37,366 INFO L495 AbstractCegarLoop]: Abstraction has 3509 states and 15544 transitions. [2022-11-18 21:01:37,366 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) [2022-11-18 21:01:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 15544 transitions. [2022-11-18 21:01:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:37,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:37,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:37,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-18 21:01:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:37,568 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1306737579, now seen corresponding path program 3 times [2022-11-18 21:01:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:37,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251529967] [2022-11-18 21:01:37,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:01:37,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:37,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:37,570 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:37,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-18 21:01:37,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:01:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:01:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:37,985 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:37,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:38,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:01:39,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:39,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251529967] [2022-11-18 21:01:39,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251529967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:39,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:39,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:01:39,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135833854] [2022-11-18 21:01:39,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:39,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:39,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:39,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:39,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:39,010 INFO L87 Difference]: Start difference. First operand 3509 states and 15544 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) [2022-11-18 21:01:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:39,756 INFO L93 Difference]: Finished difference Result 3685 states and 16430 transitions. [2022-11-18 21:01:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:01:39,757 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 [2022-11-18 21:01:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:39,769 INFO L225 Difference]: With dead ends: 3685 [2022-11-18 21:01:39,769 INFO L226 Difference]: Without dead ends: 3685 [2022-11-18 21:01:39,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:01:39,770 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:39,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 78 Unchecked, 0.6s Time] [2022-11-18 21:01:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2022-11-18 21:01:39,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3585. [2022-11-18 21:01:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3585 states, 3571 states have (on average 4.468776253150378) internal successors, (15958), 3584 states have internal predecessors, (15958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3585 states to 3585 states and 15958 transitions. [2022-11-18 21:01:39,890 INFO L78 Accepts]: Start accepts. Automaton has 3585 states and 15958 transitions. Word has length 12 [2022-11-18 21:01:39,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:39,891 INFO L495 AbstractCegarLoop]: Abstraction has 3585 states and 15958 transitions. [2022-11-18 21:01:39,891 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) [2022-11-18 21:01:39,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3585 states and 15958 transitions. [2022-11-18 21:01:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 21:01:39,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:39,893 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:39,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-18 21:01:40,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:40,094 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:40,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:40,094 INFO L85 PathProgramCache]: Analyzing trace with hash 423257392, now seen corresponding path program 5 times [2022-11-18 21:01:40,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:40,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047270633] [2022-11-18 21:01:40,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:01:40,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:40,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:40,098 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:40,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-18 21:01:40,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 21:01:40,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:40,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 21:01:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:40,519 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:40,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:40,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:41,040 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 8 treesize of output 6 [2022-11-18 21:01:41,067 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:01:41,072 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:01:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:42,444 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:42,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047270633] [2022-11-18 21:01:42,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047270633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:42,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:42,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:01:42,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053706590] [2022-11-18 21:01:42,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:42,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 21:01:42,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:42,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 21:01:42,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:01:42,446 INFO L87 Difference]: Start difference. First operand 3585 states and 15958 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:45,687 INFO L93 Difference]: Finished difference Result 3893 states and 16839 transitions. [2022-11-18 21:01:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 21:01:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 21:01:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:45,701 INFO L225 Difference]: With dead ends: 3893 [2022-11-18 21:01:45,701 INFO L226 Difference]: Without dead ends: 3893 [2022-11-18 21:01:45,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:01:45,702 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:45,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 238 Invalid, 0 Unknown, 76 Unchecked, 1.9s Time] [2022-11-18 21:01:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2022-11-18 21:01:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 3583. [2022-11-18 21:01:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3569 states have (on average 4.469038946483609) internal successors, (15950), 3582 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 15950 transitions. [2022-11-18 21:01:45,845 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 15950 transitions. Word has length 12 [2022-11-18 21:01:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:45,845 INFO L495 AbstractCegarLoop]: Abstraction has 3583 states and 15950 transitions. [2022-11-18 21:01:45,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 15950 transitions. [2022-11-18 21:01:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:01:45,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:45,848 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-18 21:01:45,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:46,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:46,049 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:01:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1092461316, now seen corresponding path program 4 times [2022-11-18 21:01:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:46,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600052161] [2022-11-18 21:01:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:01:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:46,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:46,053 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:01:46,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-18 21:01:46,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:01:46,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:01:46,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:46,561 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:46,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:47,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:49,965 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:49,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600052161] [2022-11-18 21:01:49,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600052161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:49,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:49,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-18 21:01:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390327492] [2022-11-18 21:01:49,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:49,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 21:01:49,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 21:01:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:01:49,967 INFO L87 Difference]: Start difference. First operand 3583 states and 15950 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) [2022-11-18 21:02:28,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:28,784 INFO L93 Difference]: Finished difference Result 7868 states and 33001 transitions. [2022-11-18 21:02:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 21:02:28,787 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 [2022-11-18 21:02:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:28,812 INFO L225 Difference]: With dead ends: 7868 [2022-11-18 21:02:28,812 INFO L226 Difference]: Without dead ends: 7868 [2022-11-18 21:02:28,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=566, Invalid=2626, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 21:02:28,813 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2039 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 3981 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 4025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:28,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2039 Valid, 581 Invalid, 4025 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 3981 Invalid, 0 Unknown, 0 Unchecked, 25.9s Time] [2022-11-18 21:02:28,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7868 states. [2022-11-18 21:02:28,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7868 to 4783. [2022-11-18 21:02:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4783 states, 4769 states have (on average 4.481862025581883) internal successors, (21374), 4782 states have internal predecessors, (21374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4783 states to 4783 states and 21374 transitions. [2022-11-18 21:02:28,972 INFO L78 Accepts]: Start accepts. Automaton has 4783 states and 21374 transitions. Word has length 13 [2022-11-18 21:02:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:28,973 INFO L495 AbstractCegarLoop]: Abstraction has 4783 states and 21374 transitions. [2022-11-18 21:02:28,973 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) [2022-11-18 21:02:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4783 states and 21374 transitions. [2022-11-18 21:02:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:02:28,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:28,976 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-18 21:02:28,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-18 21:02:29,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:02:29,186 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:02:29,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:29,187 INFO L85 PathProgramCache]: Analyzing trace with hash -777406975, now seen corresponding path program 5 times [2022-11-18 21:02:29,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:02:29,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109181238] [2022-11-18 21:02:29,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:02:29,187 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:02:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:02:29,188 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:02:29,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-18 21:02:29,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 21:02:29,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:02:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:02:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:29,651 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:02:29,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:02:30,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-11-18 21:02:30,240 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 [2022-11-18 21:02:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:02:30,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:30,557 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 [2022-11-18 21:02:30,588 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:02:30,593 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:02:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:33,413 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:02:33,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109181238] [2022-11-18 21:02:33,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109181238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:33,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:33,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 21 [2022-11-18 21:02:33,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500708657] [2022-11-18 21:02:33,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 21:02:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:02:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 21:02:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:02:33,416 INFO L87 Difference]: Start difference. First operand 4783 states and 21374 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) [2022-11-18 21:02:53,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:02:53,632 INFO L93 Difference]: Finished difference Result 7638 states and 32644 transitions. [2022-11-18 21:02:53,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 21:02:53,634 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 [2022-11-18 21:02:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:02:53,662 INFO L225 Difference]: With dead ends: 7638 [2022-11-18 21:02:53,662 INFO L226 Difference]: Without dead ends: 7638 [2022-11-18 21:02:53,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 21:02:53,663 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 875 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 1851 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:02:53,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [875 Valid, 285 Invalid, 2265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1851 Invalid, 0 Unknown, 402 Unchecked, 13.8s Time] [2022-11-18 21:02:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7638 states. [2022-11-18 21:02:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7638 to 5143. [2022-11-18 21:02:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5129 states have (on average 4.490348995905634) internal successors, (23031), 5142 states have internal predecessors, (23031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:53,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 23031 transitions. [2022-11-18 21:02:53,876 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 23031 transitions. Word has length 13 [2022-11-18 21:02:53,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:02:53,877 INFO L495 AbstractCegarLoop]: Abstraction has 5143 states and 23031 transitions. [2022-11-18 21:02:53,877 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) [2022-11-18 21:02:53,877 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 23031 transitions. [2022-11-18 21:02:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:02:53,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:02:53,880 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:53,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:54,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:02:54,094 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:02:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:54,095 INFO L85 PathProgramCache]: Analyzing trace with hash 906890364, now seen corresponding path program 6 times [2022-11-18 21:02:54,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:02:54,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969114313] [2022-11-18 21:02:54,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:02:54,096 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 [2022-11-18 21:02:54,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:02:54,097 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:02:54,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-18 21:02:54,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 21:02:54,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:02:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:02:54,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:54,592 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:02:54,594 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 [2022-11-18 21:02:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:55,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:57,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:02:57,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969114313] [2022-11-18 21:02:57,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969114313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:57,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:57,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 21:02:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529239528] [2022-11-18 21:02:57,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:57,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 21:02:57,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:02:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 21:02:57,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:02:57,028 INFO L87 Difference]: Start difference. First operand 5143 states and 23031 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-11-18 21:03:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:07,583 INFO L93 Difference]: Finished difference Result 10158 states and 44054 transitions. [2022-11-18 21:03:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 21:03:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 [2022-11-18 21:03:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:07,624 INFO L225 Difference]: With dead ends: 10158 [2022-11-18 21:03:07,624 INFO L226 Difference]: Without dead ends: 10158 [2022-11-18 21:03:07,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-11-18 21:03:07,625 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 391 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 794 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:07,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 122 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 840 Invalid, 0 Unknown, 794 Unchecked, 6.8s Time] [2022-11-18 21:03:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10158 states. [2022-11-18 21:03:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10158 to 7177. [2022-11-18 21:03:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 7163 states have (on average 4.612173670249895) internal successors, (33037), 7176 states have internal predecessors, (33037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 33037 transitions. [2022-11-18 21:03:07,823 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 33037 transitions. Word has length 13 [2022-11-18 21:03:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:07,823 INFO L495 AbstractCegarLoop]: Abstraction has 7177 states and 33037 transitions. [2022-11-18 21:03:07,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-11-18 21:03:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 33037 transitions. [2022-11-18 21:03:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:07,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:07,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:07,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-18 21:03:08,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:08,026 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:08,026 INFO L85 PathProgramCache]: Analyzing trace with hash 902749415, now seen corresponding path program 5 times [2022-11-18 21:03:08,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:08,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109230454] [2022-11-18 21:03:08,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:03:08,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:08,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:08,028 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:08,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-18 21:03:08,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:08,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:03:08,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:08,505 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:08,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:08,985 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 [2022-11-18 21:03:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:09,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:09,237 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 [2022-11-18 21:03:09,269 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:03:09,272 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:03:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:10,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:10,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109230454] [2022-11-18 21:03:10,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109230454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:10,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:10,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 21:03:10,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798553420] [2022-11-18 21:03:10,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:10,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:03:10,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:10,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:03:10,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:03:10,996 INFO L87 Difference]: Start difference. First operand 7177 states and 33037 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-18 21:03:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:13,049 INFO L93 Difference]: Finished difference Result 8212 states and 37079 transitions. [2022-11-18 21:03:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 21:03:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2022-11-18 21:03:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:13,082 INFO L225 Difference]: With dead ends: 8212 [2022-11-18 21:03:13,082 INFO L226 Difference]: Without dead ends: 8212 [2022-11-18 21:03:13,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:03:13,083 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:13,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 53 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 242 Invalid, 0 Unknown, 148 Unchecked, 1.7s Time] [2022-11-18 21:03:13,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8212 states. [2022-11-18 21:03:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8212 to 7467. [2022-11-18 21:03:13,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7467 states, 7453 states have (on average 4.621360525962699) internal successors, (34443), 7466 states have internal predecessors, (34443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7467 states to 7467 states and 34443 transitions. [2022-11-18 21:03:13,266 INFO L78 Accepts]: Start accepts. Automaton has 7467 states and 34443 transitions. Word has length 13 [2022-11-18 21:03:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:13,266 INFO L495 AbstractCegarLoop]: Abstraction has 7467 states and 34443 transitions. [2022-11-18 21:03:13,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-18 21:03:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 7467 states and 34443 transitions. [2022-11-18 21:03:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:13,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:13,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:13,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-18 21:03:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:13,469 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:13,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1570585359, now seen corresponding path program 1 times [2022-11-18 21:03:13,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:13,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707148674] [2022-11-18 21:03:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:13,470 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 [2022-11-18 21:03:13,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:13,471 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:13,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-18 21:03:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:13,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:13,910 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:13,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:14,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:14,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:14,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707148674] [2022-11-18 21:03:14,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707148674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:14,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:14,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:14,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894155687] [2022-11-18 21:03:14,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:14,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:14,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:14,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:14,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:14,976 INFO L87 Difference]: Start difference. First operand 7467 states and 34443 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) [2022-11-18 21:03:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:15,675 INFO L93 Difference]: Finished difference Result 7664 states and 35328 transitions. [2022-11-18 21:03:15,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:15,677 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 [2022-11-18 21:03:15,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:15,705 INFO L225 Difference]: With dead ends: 7664 [2022-11-18 21:03:15,705 INFO L226 Difference]: Without dead ends: 7664 [2022-11-18 21:03:15,706 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 [2022-11-18 21:03:15,706 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:15,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 31 Unchecked, 0.6s Time] [2022-11-18 21:03:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7664 states. [2022-11-18 21:03:15,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7664 to 7469. [2022-11-18 21:03:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7469 states, 7455 states have (on average 4.620925553319919) internal successors, (34449), 7468 states have internal predecessors, (34449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7469 states to 7469 states and 34449 transitions. [2022-11-18 21:03:15,909 INFO L78 Accepts]: Start accepts. Automaton has 7469 states and 34449 transitions. Word has length 13 [2022-11-18 21:03:15,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:15,909 INFO L495 AbstractCegarLoop]: Abstraction has 7469 states and 34449 transitions. [2022-11-18 21:03:15,909 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) [2022-11-18 21:03:15,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7469 states and 34449 transitions. [2022-11-18 21:03:15,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:15,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:15,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:15,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-18 21:03:16,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:16,112 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:16,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1575947739, now seen corresponding path program 2 times [2022-11-18 21:03:16,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:16,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11135731] [2022-11-18 21:03:16,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:16,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:16,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:16,114 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-18 21:03:16,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:16,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:16,582 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:16,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:17,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:17,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:17,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11135731] [2022-11-18 21:03:17,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11135731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:17,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:17,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:17,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896133760] [2022-11-18 21:03:17,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:17,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:17,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:17,739 INFO L87 Difference]: Start difference. First operand 7469 states and 34449 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) [2022-11-18 21:03:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:18,426 INFO L93 Difference]: Finished difference Result 7718 states and 35553 transitions. [2022-11-18 21:03:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:18,428 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 [2022-11-18 21:03:18,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:18,458 INFO L225 Difference]: With dead ends: 7718 [2022-11-18 21:03:18,458 INFO L226 Difference]: Without dead ends: 7718 [2022-11-18 21:03:18,458 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 [2022-11-18 21:03:18,459 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:18,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 28 Unchecked, 0.6s Time] [2022-11-18 21:03:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2022-11-18 21:03:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 7488. [2022-11-18 21:03:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7474 states have (on average 4.616938720899117) internal successors, (34507), 7487 states have internal predecessors, (34507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 34507 transitions. [2022-11-18 21:03:18,638 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 34507 transitions. Word has length 13 [2022-11-18 21:03:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:18,638 INFO L495 AbstractCegarLoop]: Abstraction has 7488 states and 34507 transitions. [2022-11-18 21:03:18,638 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) [2022-11-18 21:03:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 34507 transitions. [2022-11-18 21:03:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:18,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:18,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:18,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:18,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:18,842 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1575960759, now seen corresponding path program 3 times [2022-11-18 21:03:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:18,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154631145] [2022-11-18 21:03:18,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:18,843 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 [2022-11-18 21:03:18,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:18,844 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:18,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-18 21:03:19,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:03:19,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:19,283 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:19,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:19,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:03:20,406 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:20,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154631145] [2022-11-18 21:03:20,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154631145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:20,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:20,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:20,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056649437] [2022-11-18 21:03:20,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:20,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:20,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:20,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:20,408 INFO L87 Difference]: Start difference. First operand 7488 states and 34507 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) [2022-11-18 21:03:21,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:21,314 INFO L93 Difference]: Finished difference Result 8815 states and 40841 transitions. [2022-11-18 21:03:21,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:21,316 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 [2022-11-18 21:03:21,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:21,349 INFO L225 Difference]: With dead ends: 8815 [2022-11-18 21:03:21,349 INFO L226 Difference]: Without dead ends: 8815 [2022-11-18 21:03:21,350 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 [2022-11-18 21:03:21,350 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:21,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 23 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 131 Unchecked, 0.8s Time] [2022-11-18 21:03:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8815 states. [2022-11-18 21:03:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8815 to 7484. [2022-11-18 21:03:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7484 states, 7470 states have (on average 4.617670682730924) internal successors, (34494), 7483 states have internal predecessors, (34494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7484 states to 7484 states and 34494 transitions. [2022-11-18 21:03:21,538 INFO L78 Accepts]: Start accepts. Automaton has 7484 states and 34494 transitions. Word has length 13 [2022-11-18 21:03:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:21,538 INFO L495 AbstractCegarLoop]: Abstraction has 7484 states and 34494 transitions. [2022-11-18 21:03:21,538 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) [2022-11-18 21:03:21,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7484 states and 34494 transitions. [2022-11-18 21:03:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:21,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:21,541 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:21,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-18 21:03:21,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:21,741 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:21,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash -946056767, now seen corresponding path program 8 times [2022-11-18 21:03:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:21,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938675267] [2022-11-18 21:03:21,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:21,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:21,743 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:21,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-18 21:03:22,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:22,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:03:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:22,274 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:22,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:22,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:23,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:23,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938675267] [2022-11-18 21:03:23,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938675267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:23,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:23,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 21:03:23,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074779478] [2022-11-18 21:03:23,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:23,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:03:23,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:23,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:03:23,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:03:23,934 INFO L87 Difference]: Start difference. First operand 7484 states and 34494 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-18 21:03:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:26,298 INFO L93 Difference]: Finished difference Result 7546 states and 34724 transitions. [2022-11-18 21:03:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:03:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2022-11-18 21:03:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:26,328 INFO L225 Difference]: With dead ends: 7546 [2022-11-18 21:03:26,328 INFO L226 Difference]: Without dead ends: 7546 [2022-11-18 21:03:26,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:03:26,329 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:26,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 80 Unchecked, 1.1s Time] [2022-11-18 21:03:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7546 states. [2022-11-18 21:03:26,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7546 to 7499. [2022-11-18 21:03:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7499 states, 7485 states have (on average 4.615364061456246) internal successors, (34546), 7498 states have internal predecessors, (34546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:26,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7499 states to 7499 states and 34546 transitions. [2022-11-18 21:03:26,621 INFO L78 Accepts]: Start accepts. Automaton has 7499 states and 34546 transitions. Word has length 13 [2022-11-18 21:03:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:26,621 INFO L495 AbstractCegarLoop]: Abstraction has 7499 states and 34546 transitions. [2022-11-18 21:03:26,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-18 21:03:26,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7499 states and 34546 transitions. [2022-11-18 21:03:26,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:26,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:26,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:26,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:26,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:26,827 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:26,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash -946061076, now seen corresponding path program 1 times [2022-11-18 21:03:26,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38924624] [2022-11-18 21:03:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:03:26,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:26,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:26,829 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:26,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-18 21:03:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:27,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:27,257 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:27,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:27,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:28,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:28,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38924624] [2022-11-18 21:03:28,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38924624] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:28,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:28,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:28,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431647305] [2022-11-18 21:03:28,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:28,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:28,324 INFO L87 Difference]: Start difference. First operand 7499 states and 34546 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) [2022-11-18 21:03:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:29,191 INFO L93 Difference]: Finished difference Result 8567 states and 40241 transitions. [2022-11-18 21:03:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:29,193 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 [2022-11-18 21:03:29,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:29,225 INFO L225 Difference]: With dead ends: 8567 [2022-11-18 21:03:29,226 INFO L226 Difference]: Without dead ends: 8567 [2022-11-18 21:03:29,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:03:29,226 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:29,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 35 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 110 Unchecked, 0.7s Time] [2022-11-18 21:03:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2022-11-18 21:03:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 7499. [2022-11-18 21:03:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7499 states, 7485 states have (on average 4.615364061456246) internal successors, (34546), 7498 states have internal predecessors, (34546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7499 states to 7499 states and 34546 transitions. [2022-11-18 21:03:29,509 INFO L78 Accepts]: Start accepts. Automaton has 7499 states and 34546 transitions. Word has length 13 [2022-11-18 21:03:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:29,510 INFO L495 AbstractCegarLoop]: Abstraction has 7499 states and 34546 transitions. [2022-11-18 21:03:29,510 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) [2022-11-18 21:03:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 7499 states and 34546 transitions. [2022-11-18 21:03:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:29,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:29,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:29,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:29,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:29,715 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash -946057077, now seen corresponding path program 4 times [2022-11-18 21:03:29,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:29,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022850908] [2022-11-18 21:03:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:03:29,716 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 [2022-11-18 21:03:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:29,717 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:29,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-18 21:03:29,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:03:29,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:29,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:30,145 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:30,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:30,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:31,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:31,176 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:31,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022850908] [2022-11-18 21:03:31,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022850908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:31,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:31,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:31,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661873123] [2022-11-18 21:03:31,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:31,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:31,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:31,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:31,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:31,177 INFO L87 Difference]: Start difference. First operand 7499 states and 34546 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) [2022-11-18 21:03:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:31,923 INFO L93 Difference]: Finished difference Result 7674 states and 35360 transitions. [2022-11-18 21:03:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:31,925 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 [2022-11-18 21:03:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:31,952 INFO L225 Difference]: With dead ends: 7674 [2022-11-18 21:03:31,952 INFO L226 Difference]: Without dead ends: 7674 [2022-11-18 21:03:31,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:03:31,952 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:31,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 65 Unchecked, 0.5s Time] [2022-11-18 21:03:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7674 states. [2022-11-18 21:03:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7674 to 7499. [2022-11-18 21:03:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7499 states, 7485 states have (on average 4.615364061456246) internal successors, (34546), 7498 states have internal predecessors, (34546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7499 states to 7499 states and 34546 transitions. [2022-11-18 21:03:32,125 INFO L78 Accepts]: Start accepts. Automaton has 7499 states and 34546 transitions. Word has length 13 [2022-11-18 21:03:32,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:32,125 INFO L495 AbstractCegarLoop]: Abstraction has 7499 states and 34546 transitions. [2022-11-18 21:03:32,125 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) [2022-11-18 21:03:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 7499 states and 34546 transitions. [2022-11-18 21:03:32,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:32,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:32,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:32,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-18 21:03:32,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:32,329 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash -946190346, now seen corresponding path program 2 times [2022-11-18 21:03:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:32,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589021782] [2022-11-18 21:03:32,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:32,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:32,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:32,331 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:32,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-18 21:03:32,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:32,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:32,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:32,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:32,815 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:32,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:33,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:33,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589021782] [2022-11-18 21:03:33,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589021782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:33,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:33,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:33,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748624861] [2022-11-18 21:03:33,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:33,953 INFO L87 Difference]: Start difference. First operand 7499 states and 34546 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) [2022-11-18 21:03:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:34,928 INFO L93 Difference]: Finished difference Result 9170 states and 43347 transitions. [2022-11-18 21:03:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:34,930 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 [2022-11-18 21:03:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:34,966 INFO L225 Difference]: With dead ends: 9170 [2022-11-18 21:03:34,966 INFO L226 Difference]: Without dead ends: 9170 [2022-11-18 21:03:34,966 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 [2022-11-18 21:03:34,967 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:34,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 29 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 104 Unchecked, 0.8s Time] [2022-11-18 21:03:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2022-11-18 21:03:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 7713. [2022-11-18 21:03:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7713 states, 7699 states have (on average 4.633588777763346) internal successors, (35674), 7712 states have internal predecessors, (35674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:35,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7713 states to 7713 states and 35674 transitions. [2022-11-18 21:03:35,288 INFO L78 Accepts]: Start accepts. Automaton has 7713 states and 35674 transitions. Word has length 13 [2022-11-18 21:03:35,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:35,288 INFO L495 AbstractCegarLoop]: Abstraction has 7713 states and 35674 transitions. [2022-11-18 21:03:35,288 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) [2022-11-18 21:03:35,288 INFO L276 IsEmpty]: Start isEmpty. Operand 7713 states and 35674 transitions. [2022-11-18 21:03:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:35,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:35,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:35,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-18 21:03:35,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:35,493 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:35,493 INFO L85 PathProgramCache]: Analyzing trace with hash -946066377, now seen corresponding path program 5 times [2022-11-18 21:03:35,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:35,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414351919] [2022-11-18 21:03:35,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:03:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:35,495 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:35,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-18 21:03:35,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:35,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:35,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:03:35,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:36,040 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:36,041 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 [2022-11-18 21:03:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:36,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:37,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414351919] [2022-11-18 21:03:37,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414351919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:37,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:37,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:03:37,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386831539] [2022-11-18 21:03:37,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:37,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:03:37,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:03:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:03:37,336 INFO L87 Difference]: Start difference. First operand 7713 states and 35674 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) [2022-11-18 21:03:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:38,100 INFO L93 Difference]: Finished difference Result 7842 states and 36258 transitions. [2022-11-18 21:03:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:38,101 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 [2022-11-18 21:03:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:38,130 INFO L225 Difference]: With dead ends: 7842 [2022-11-18 21:03:38,130 INFO L226 Difference]: Without dead ends: 7842 [2022-11-18 21:03:38,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:03:38,131 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:38,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-11-18 21:03:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2022-11-18 21:03:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 7713. [2022-11-18 21:03:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7713 states, 7699 states have (on average 4.633588777763346) internal successors, (35674), 7712 states have internal predecessors, (35674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7713 states to 7713 states and 35674 transitions. [2022-11-18 21:03:38,309 INFO L78 Accepts]: Start accepts. Automaton has 7713 states and 35674 transitions. Word has length 13 [2022-11-18 21:03:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:38,310 INFO L495 AbstractCegarLoop]: Abstraction has 7713 states and 35674 transitions. [2022-11-18 21:03:38,310 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) [2022-11-18 21:03:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7713 states and 35674 transitions. [2022-11-18 21:03:38,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:38,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:38,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:38,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-18 21:03:38,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:38,513 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:38,513 INFO L85 PathProgramCache]: Analyzing trace with hash -945238956, now seen corresponding path program 3 times [2022-11-18 21:03:38,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:38,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674280727] [2022-11-18 21:03:38,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:38,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:38,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:38,515 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:38,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-18 21:03:38,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:03:38,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:38,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:38,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:38,986 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:38,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:39,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:40,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674280727] [2022-11-18 21:03:40,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674280727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:40,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:40,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:40,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223356713] [2022-11-18 21:03:40,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:40,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:40,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:40,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:40,109 INFO L87 Difference]: Start difference. First operand 7713 states and 35674 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) [2022-11-18 21:03:40,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:40,756 INFO L93 Difference]: Finished difference Result 8028 states and 37359 transitions. [2022-11-18 21:03:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:40,758 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 [2022-11-18 21:03:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:40,788 INFO L225 Difference]: With dead ends: 8028 [2022-11-18 21:03:40,788 INFO L226 Difference]: Without dead ends: 8028 [2022-11-18 21:03:40,789 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 [2022-11-18 21:03:40,789 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:40,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-11-18 21:03:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8028 states. [2022-11-18 21:03:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8028 to 7800. [2022-11-18 21:03:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7800 states, 7786 states have (on average 4.646930387875674) internal successors, (36181), 7799 states have internal predecessors, (36181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7800 states to 7800 states and 36181 transitions. [2022-11-18 21:03:41,094 INFO L78 Accepts]: Start accepts. Automaton has 7800 states and 36181 transitions. Word has length 13 [2022-11-18 21:03:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:41,095 INFO L495 AbstractCegarLoop]: Abstraction has 7800 states and 36181 transitions. [2022-11-18 21:03:41,095 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) [2022-11-18 21:03:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 7800 states and 36181 transitions. [2022-11-18 21:03:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:41,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:41,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:41,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:41,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:41,307 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:41,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1112294856, now seen corresponding path program 4 times [2022-11-18 21:03:41,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:41,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889276206] [2022-11-18 21:03:41,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:03:41,308 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 [2022-11-18 21:03:41,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:41,309 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:41,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-18 21:03:41,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:03:41,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:41,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:41,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:41,733 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:41,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:42,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:42,769 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889276206] [2022-11-18 21:03:42,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889276206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:42,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:42,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316277505] [2022-11-18 21:03:42,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:42,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:42,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:42,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:42,771 INFO L87 Difference]: Start difference. First operand 7800 states and 36181 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) [2022-11-18 21:03:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:43,423 INFO L93 Difference]: Finished difference Result 9187 states and 43698 transitions. [2022-11-18 21:03:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:43,425 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 [2022-11-18 21:03:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:43,574 INFO L225 Difference]: With dead ends: 9187 [2022-11-18 21:03:43,574 INFO L226 Difference]: Without dead ends: 9187 [2022-11-18 21:03:43,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:03:43,575 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:43,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 23 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 82 Unchecked, 0.5s Time] [2022-11-18 21:03:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2022-11-18 21:03:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 7807. [2022-11-18 21:03:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7807 states, 7793 states have (on average 4.646734248684717) internal successors, (36212), 7806 states have internal predecessors, (36212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7807 states to 7807 states and 36212 transitions. [2022-11-18 21:03:43,850 INFO L78 Accepts]: Start accepts. Automaton has 7807 states and 36212 transitions. Word has length 13 [2022-11-18 21:03:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:43,851 INFO L495 AbstractCegarLoop]: Abstraction has 7807 states and 36212 transitions. [2022-11-18 21:03:43,851 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) [2022-11-18 21:03:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 7807 states and 36212 transitions. [2022-11-18 21:03:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:43,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:43,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:43,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-18 21:03:44,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:44,055 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1112290857, now seen corresponding path program 6 times [2022-11-18 21:03:44,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:44,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873415298] [2022-11-18 21:03:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:03:44,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:44,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:44,058 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:44,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-18 21:03:44,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:03:44,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:44,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:44,531 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:44,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:44,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:45,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:45,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873415298] [2022-11-18 21:03:45,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873415298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:45,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:45,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:45,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343121605] [2022-11-18 21:03:45,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:45,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:45,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:45,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:45,663 INFO L87 Difference]: Start difference. First operand 7807 states and 36212 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) [2022-11-18 21:03:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:46,432 INFO L93 Difference]: Finished difference Result 8057 states and 37367 transitions. [2022-11-18 21:03:46,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:46,434 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 [2022-11-18 21:03:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:46,464 INFO L225 Difference]: With dead ends: 8057 [2022-11-18 21:03:46,464 INFO L226 Difference]: Without dead ends: 8057 [2022-11-18 21:03:46,464 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 [2022-11-18 21:03:46,464 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:46,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2022-11-18 21:03:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8057 states. [2022-11-18 21:03:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8057 to 7857. [2022-11-18 21:03:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7857 states, 7843 states have (on average 4.64796633941094) internal successors, (36454), 7856 states have internal predecessors, (36454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7857 states to 7857 states and 36454 transitions. [2022-11-18 21:03:46,652 INFO L78 Accepts]: Start accepts. Automaton has 7857 states and 36454 transitions. Word has length 13 [2022-11-18 21:03:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:46,652 INFO L495 AbstractCegarLoop]: Abstraction has 7857 states and 36454 transitions. [2022-11-18 21:03:46,653 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) [2022-11-18 21:03:46,653 INFO L276 IsEmpty]: Start isEmpty. Operand 7857 states and 36454 transitions. [2022-11-18 21:03:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:46,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:46,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:46,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-18 21:03:46,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:46,856 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:46,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1112300157, now seen corresponding path program 7 times [2022-11-18 21:03:46,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:46,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597198685] [2022-11-18 21:03:46,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:03:46,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:46,858 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:46,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-18 21:03:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:03:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:47,294 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:47,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:48,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:48,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597198685] [2022-11-18 21:03:48,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597198685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:48,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:48,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:48,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061620101] [2022-11-18 21:03:48,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:48,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:48,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:48,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:48,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:48,444 INFO L87 Difference]: Start difference. First operand 7857 states and 36454 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) [2022-11-18 21:03:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:49,140 INFO L93 Difference]: Finished difference Result 9484 states and 44950 transitions. [2022-11-18 21:03:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:49,142 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 [2022-11-18 21:03:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:49,179 INFO L225 Difference]: With dead ends: 9484 [2022-11-18 21:03:49,179 INFO L226 Difference]: Without dead ends: 9484 [2022-11-18 21:03:49,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:03:49,180 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:49,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2022-11-18 21:03:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9484 states. [2022-11-18 21:03:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9484 to 7896. [2022-11-18 21:03:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7896 states, 7882 states have (on average 4.6432377569144885) internal successors, (36598), 7895 states have internal predecessors, (36598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7896 states to 7896 states and 36598 transitions. [2022-11-18 21:03:49,383 INFO L78 Accepts]: Start accepts. Automaton has 7896 states and 36598 transitions. Word has length 13 [2022-11-18 21:03:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:49,383 INFO L495 AbstractCegarLoop]: Abstraction has 7896 states and 36598 transitions. [2022-11-18 21:03:49,383 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) [2022-11-18 21:03:49,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7896 states and 36598 transitions. [2022-11-18 21:03:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:49,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:49,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:49,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:49,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:49,586 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:49,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1112694477, now seen corresponding path program 8 times [2022-11-18 21:03:49,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:49,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024182828] [2022-11-18 21:03:49,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:03:49,587 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:49,588 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:49,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-18 21:03:49,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:50,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:50,179 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:50,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:50,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:51,289 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:51,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024182828] [2022-11-18 21:03:51,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024182828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:51,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:51,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:51,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323877030] [2022-11-18 21:03:51,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:51,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:51,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:51,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:51,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:51,290 INFO L87 Difference]: Start difference. First operand 7896 states and 36598 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) [2022-11-18 21:03:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:52,175 INFO L93 Difference]: Finished difference Result 9439 states and 44484 transitions. [2022-11-18 21:03:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:03:52,177 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 [2022-11-18 21:03:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:52,212 INFO L225 Difference]: With dead ends: 9439 [2022-11-18 21:03:52,213 INFO L226 Difference]: Without dead ends: 9439 [2022-11-18 21:03:52,213 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 [2022-11-18 21:03:52,213 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 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 [2022-11-18 21:03:52,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 87 Unchecked, 0.7s Time] [2022-11-18 21:03:52,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9439 states. [2022-11-18 21:03:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9439 to 8039. [2022-11-18 21:03:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 8025 states have (on average 4.673146417445483) internal successors, (37502), 8038 states have internal predecessors, (37502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 37502 transitions. [2022-11-18 21:03:52,553 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 37502 transitions. Word has length 13 [2022-11-18 21:03:52,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:52,553 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 37502 transitions. [2022-11-18 21:03:52,553 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) [2022-11-18 21:03:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 37502 transitions. [2022-11-18 21:03:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:52,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:52,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:52,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-18 21:03:52,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:52,758 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:52,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1113005097, now seen corresponding path program 9 times [2022-11-18 21:03:52,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:52,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008835821] [2022-11-18 21:03:52,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:52,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:52,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:52,761 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:52,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-18 21:03:53,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:03:53,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:53,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:03:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:53,279 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:53,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:53,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:03:54,473 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:54,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008835821] [2022-11-18 21:03:54,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008835821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:54,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:54,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:03:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586380501] [2022-11-18 21:03:54,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:54,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:03:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:03:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:03:54,475 INFO L87 Difference]: Start difference. First operand 8039 states and 37502 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) [2022-11-18 21:03:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:55,710 INFO L93 Difference]: Finished difference Result 9573 states and 44983 transitions. [2022-11-18 21:03:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:55,712 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 [2022-11-18 21:03:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:55,759 INFO L225 Difference]: With dead ends: 9573 [2022-11-18 21:03:55,759 INFO L226 Difference]: Without dead ends: 9573 [2022-11-18 21:03:55,760 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 [2022-11-18 21:03:55,760 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:55,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 25 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 161 Unchecked, 1.1s Time] [2022-11-18 21:03:55,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9573 states. [2022-11-18 21:03:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9573 to 8031. [2022-11-18 21:03:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8031 states, 8017 states have (on average 4.674816015966072) internal successors, (37478), 8030 states have internal predecessors, (37478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8031 states to 8031 states and 37478 transitions. [2022-11-18 21:03:56,139 INFO L78 Accepts]: Start accepts. Automaton has 8031 states and 37478 transitions. Word has length 13 [2022-11-18 21:03:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:56,140 INFO L495 AbstractCegarLoop]: Abstraction has 8031 states and 37478 transitions. [2022-11-18 21:03:56,140 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) [2022-11-18 21:03:56,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8031 states and 37478 transitions. [2022-11-18 21:03:56,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:56,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:56,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:56,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-18 21:03:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:56,343 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1818297192, now seen corresponding path program 5 times [2022-11-18 21:03:56,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:56,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482034291] [2022-11-18 21:03:56,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:03:56,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:56,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:56,345 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:56,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-18 21:03:56,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:03:56,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:56,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:03:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:56,819 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:56,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:03:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:57,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:03:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:58,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:03:58,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482034291] [2022-11-18 21:03:58,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482034291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:58,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:03:58,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:03:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362961756] [2022-11-18 21:03:58,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:58,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:03:58,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:03:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:03:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:03:58,136 INFO L87 Difference]: Start difference. First operand 8031 states and 37478 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) [2022-11-18 21:03:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:03:58,845 INFO L93 Difference]: Finished difference Result 8233 states and 38535 transitions. [2022-11-18 21:03:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:03:58,846 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 [2022-11-18 21:03:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:03:58,876 INFO L225 Difference]: With dead ends: 8233 [2022-11-18 21:03:58,876 INFO L226 Difference]: Without dead ends: 8233 [2022-11-18 21:03:58,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:03:58,877 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:03:58,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 74 Unchecked, 0.6s Time] [2022-11-18 21:03:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8233 states. [2022-11-18 21:03:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8233 to 8033. [2022-11-18 21:03:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8033 states, 8019 states have (on average 4.674897119341564) internal successors, (37488), 8032 states have internal predecessors, (37488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:03:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8033 states to 8033 states and 37488 transitions. [2022-11-18 21:03:59,198 INFO L78 Accepts]: Start accepts. Automaton has 8033 states and 37488 transitions. Word has length 13 [2022-11-18 21:03:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:03:59,199 INFO L495 AbstractCegarLoop]: Abstraction has 8033 states and 37488 transitions. [2022-11-18 21:03:59,199 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) [2022-11-18 21:03:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 8033 states and 37488 transitions. [2022-11-18 21:03:59,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:03:59,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:03:59,201 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:03:59,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-18 21:03:59,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:03:59,402 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:03:59,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:03:59,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1813896773, now seen corresponding path program 9 times [2022-11-18 21:03:59,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:03:59,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321305636] [2022-11-18 21:03:59,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:03:59,403 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 [2022-11-18 21:03:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:03:59,404 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:03:59,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-18 21:03:59,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:03:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:03:59,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:03:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:03:59,909 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:03:59,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:04:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:00,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:01,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:01,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321305636] [2022-11-18 21:04:01,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321305636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:01,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:01,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 21:04:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014721303] [2022-11-18 21:04:01,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:01,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 21:04:01,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 21:04:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:04:01,531 INFO L87 Difference]: Start difference. First operand 8033 states and 37488 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-18 21:04:03,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:03,995 INFO L93 Difference]: Finished difference Result 8080 states and 37700 transitions. [2022-11-18 21:04:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:04:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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 [2022-11-18 21:04:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:04,028 INFO L225 Difference]: With dead ends: 8080 [2022-11-18 21:04:04,028 INFO L226 Difference]: Without dead ends: 8080 [2022-11-18 21:04:04,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:04:04,029 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:04,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 91 Unchecked, 1.1s Time] [2022-11-18 21:04:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8080 states. [2022-11-18 21:04:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8080 to 8035. [2022-11-18 21:04:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8035 states, 8021 states have (on average 4.674728836803391) internal successors, (37496), 8034 states have internal predecessors, (37496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8035 states to 8035 states and 37496 transitions. [2022-11-18 21:04:04,334 INFO L78 Accepts]: Start accepts. Automaton has 8035 states and 37496 transitions. Word has length 13 [2022-11-18 21:04:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:04,335 INFO L495 AbstractCegarLoop]: Abstraction has 8035 states and 37496 transitions. [2022-11-18 21:04:04,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-11-18 21:04:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 8035 states and 37496 transitions. [2022-11-18 21:04:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:04,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:04,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:04,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:04,539 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:04,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:04,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1813901082, now seen corresponding path program 6 times [2022-11-18 21:04:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:04,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53101264] [2022-11-18 21:04:04,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:04:04,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:04,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:04,541 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:04,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-18 21:04:04,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:04:04,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:04,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:05,032 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:05,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:04:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:05,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:06,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53101264] [2022-11-18 21:04:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53101264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:06,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:06,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:04:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678243470] [2022-11-18 21:04:06,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:06,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:06,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:06,136 INFO L87 Difference]: Start difference. First operand 8035 states and 37496 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) [2022-11-18 21:04:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:07,033 INFO L93 Difference]: Finished difference Result 9186 states and 43553 transitions. [2022-11-18 21:04:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:04:07,034 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 [2022-11-18 21:04:07,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:07,072 INFO L225 Difference]: With dead ends: 9186 [2022-11-18 21:04:07,072 INFO L226 Difference]: Without dead ends: 9186 [2022-11-18 21:04:07,072 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 [2022-11-18 21:04:07,072 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:07,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 20 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 79 Unchecked, 0.8s Time] [2022-11-18 21:04:07,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9186 states. [2022-11-18 21:04:07,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9186 to 8050. [2022-11-18 21:04:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8036 states have (on average 4.673718267794923) internal successors, (37558), 8049 states have internal predecessors, (37558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 37558 transitions. [2022-11-18 21:04:07,446 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 37558 transitions. Word has length 13 [2022-11-18 21:04:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:07,446 INFO L495 AbstractCegarLoop]: Abstraction has 8050 states and 37558 transitions. [2022-11-18 21:04:07,446 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) [2022-11-18 21:04:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 37558 transitions. [2022-11-18 21:04:07,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:07,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:07,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:07,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:07,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:07,651 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:07,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1813897083, now seen corresponding path program 10 times [2022-11-18 21:04:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:07,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959947970] [2022-11-18 21:04:07,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:04:07,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:07,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:07,655 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:07,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-18 21:04:07,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:04:07,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:07,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:08,126 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:08,126 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 [2022-11-18 21:04:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:08,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:09,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:09,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959947970] [2022-11-18 21:04:09,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959947970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:09,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:09,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:04:09,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972056874] [2022-11-18 21:04:09,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:09,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:09,324 INFO L87 Difference]: Start difference. First operand 8050 states and 37558 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) [2022-11-18 21:04:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:09,757 INFO L93 Difference]: Finished difference Result 8175 states and 38139 transitions. [2022-11-18 21:04:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:04:09,759 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 [2022-11-18 21:04:09,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:09,800 INFO L225 Difference]: With dead ends: 8175 [2022-11-18 21:04:09,800 INFO L226 Difference]: Without dead ends: 8175 [2022-11-18 21:04:09,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:04:09,801 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:09,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-18 21:04:09,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8175 states. [2022-11-18 21:04:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8175 to 8051. [2022-11-18 21:04:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8051 states, 8037 states have (on average 4.6735100161751895) internal successors, (37561), 8050 states have internal predecessors, (37561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8051 states to 8051 states and 37561 transitions. [2022-11-18 21:04:10,058 INFO L78 Accepts]: Start accepts. Automaton has 8051 states and 37561 transitions. Word has length 13 [2022-11-18 21:04:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:10,058 INFO L495 AbstractCegarLoop]: Abstraction has 8051 states and 37561 transitions. [2022-11-18 21:04:10,059 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) [2022-11-18 21:04:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8051 states and 37561 transitions. [2022-11-18 21:04:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:10,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:10,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:10,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:10,263 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1813906383, now seen corresponding path program 11 times [2022-11-18 21:04:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:10,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488029819] [2022-11-18 21:04:10,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:04:10,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:10,266 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:10,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-18 21:04:10,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:04:10,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:10,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:04:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:10,757 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:10,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:04:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:11,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:12,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488029819] [2022-11-18 21:04:12,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488029819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:12,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:12,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:04:12,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806576832] [2022-11-18 21:04:12,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:12,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:04:12,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:12,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:04:12,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:04:12,117 INFO L87 Difference]: Start difference. First operand 8051 states and 37561 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) [2022-11-18 21:04:12,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:12,917 INFO L93 Difference]: Finished difference Result 8184 states and 38163 transitions. [2022-11-18 21:04:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:04:12,919 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 [2022-11-18 21:04:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:12,961 INFO L225 Difference]: With dead ends: 8184 [2022-11-18 21:04:12,961 INFO L226 Difference]: Without dead ends: 8184 [2022-11-18 21:04:12,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:04:12,961 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:12,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 32 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2022-11-18 21:04:12,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8184 states. [2022-11-18 21:04:13,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8184 to 8050. [2022-11-18 21:04:13,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8050 states, 8036 states have (on average 4.673593827775012) internal successors, (37557), 8049 states have internal predecessors, (37557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8050 states to 8050 states and 37557 transitions. [2022-11-18 21:04:13,307 INFO L78 Accepts]: Start accepts. Automaton has 8050 states and 37557 transitions. Word has length 13 [2022-11-18 21:04:13,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:13,308 INFO L495 AbstractCegarLoop]: Abstraction has 8050 states and 37557 transitions. [2022-11-18 21:04:13,308 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) [2022-11-18 21:04:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 8050 states and 37557 transitions. [2022-11-18 21:04:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:13,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:13,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:13,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-18 21:04:13,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:13,518 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:13,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:13,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1788812472, now seen corresponding path program 7 times [2022-11-18 21:04:13,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:13,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840910407] [2022-11-18 21:04:13,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:04:13,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:13,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:13,521 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:13,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-18 21:04:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:13,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:13,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:13,976 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:13,976 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 [2022-11-18 21:04:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:14,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:14,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:14,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840910407] [2022-11-18 21:04:14,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840910407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:14,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:14,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:04:14,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112898408] [2022-11-18 21:04:14,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:14,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:14,985 INFO L87 Difference]: Start difference. First operand 8050 states and 37557 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) [2022-11-18 21:04:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:15,682 INFO L93 Difference]: Finished difference Result 8234 states and 38503 transitions. [2022-11-18 21:04:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:04:15,684 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 [2022-11-18 21:04:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:15,715 INFO L225 Difference]: With dead ends: 8234 [2022-11-18 21:04:15,715 INFO L226 Difference]: Without dead ends: 8234 [2022-11-18 21:04:15,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:04:15,716 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:15,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 17 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 53 Unchecked, 0.6s Time] [2022-11-18 21:04:15,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2022-11-18 21:04:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 8052. [2022-11-18 21:04:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8038 states have (on average 4.67355063448619) internal successors, (37566), 8051 states have internal predecessors, (37566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 37566 transitions. [2022-11-18 21:04:15,907 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 37566 transitions. Word has length 13 [2022-11-18 21:04:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:15,908 INFO L495 AbstractCegarLoop]: Abstraction has 8052 states and 37566 transitions. [2022-11-18 21:04:15,908 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) [2022-11-18 21:04:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 37566 transitions. [2022-11-18 21:04:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:15,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:15,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:15,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-18 21:04:16,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:16,111 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1788804102, now seen corresponding path program 8 times [2022-11-18 21:04:16,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562309341] [2022-11-18 21:04:16,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:04:16,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:16,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:16,113 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:16,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-18 21:04:16,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:04:16,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:16,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:16,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:04:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:16,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:17,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:17,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562309341] [2022-11-18 21:04:17,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562309341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:17,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:17,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:04:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209749113] [2022-11-18 21:04:17,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:17,668 INFO L87 Difference]: Start difference. First operand 8052 states and 37566 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) [2022-11-18 21:04:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:18,265 INFO L93 Difference]: Finished difference Result 8440 states and 39628 transitions. [2022-11-18 21:04:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:04:18,267 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 [2022-11-18 21:04:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:18,300 INFO L225 Difference]: With dead ends: 8440 [2022-11-18 21:04:18,300 INFO L226 Difference]: Without dead ends: 8440 [2022-11-18 21:04:18,300 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 [2022-11-18 21:04:18,301 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:18,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-18 21:04:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8440 states. [2022-11-18 21:04:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8440 to 8104. [2022-11-18 21:04:18,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8104 states, 8090 states have (on average 4.6813349814585905) internal successors, (37872), 8103 states have internal predecessors, (37872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8104 states to 8104 states and 37872 transitions. [2022-11-18 21:04:18,559 INFO L78 Accepts]: Start accepts. Automaton has 8104 states and 37872 transitions. Word has length 13 [2022-11-18 21:04:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:18,559 INFO L495 AbstractCegarLoop]: Abstraction has 8104 states and 37872 transitions. [2022-11-18 21:04:18,559 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) [2022-11-18 21:04:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 8104 states and 37872 transitions. [2022-11-18 21:04:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:18,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:18,562 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:18,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:18,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:18,763 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1617905349, now seen corresponding path program 10 times [2022-11-18 21:04:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:18,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834904519] [2022-11-18 21:04:18,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:04:18,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:18,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:18,765 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:18,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-18 21:04:19,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:04:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:19,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:04:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:19,252 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:19,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:04:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:19,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:04:20,624 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834904519] [2022-11-18 21:04:20,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834904519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:20,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:20,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2022-11-18 21:04:20,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12762451] [2022-11-18 21:04:20,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:20,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:04:20,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:20,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:04:20,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:04:20,626 INFO L87 Difference]: Start difference. First operand 8104 states and 37872 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) 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) [2022-11-18 21:04:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:21,951 INFO L93 Difference]: Finished difference Result 8106 states and 37861 transitions. [2022-11-18 21:04:21,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:04:21,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) 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 [2022-11-18 21:04:21,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:21,984 INFO L225 Difference]: With dead ends: 8106 [2022-11-18 21:04:21,984 INFO L226 Difference]: Without dead ends: 8106 [2022-11-18 21:04:21,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:04:21,985 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:21,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 41 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 134 Unchecked, 1.2s Time] [2022-11-18 21:04:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8106 states. [2022-11-18 21:04:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8106 to 8076. [2022-11-18 21:04:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8076 states, 8062 states have (on average 4.682336889109402) internal successors, (37749), 8075 states have internal predecessors, (37749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8076 states to 8076 states and 37749 transitions. [2022-11-18 21:04:22,179 INFO L78 Accepts]: Start accepts. Automaton has 8076 states and 37749 transitions. Word has length 13 [2022-11-18 21:04:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:22,179 INFO L495 AbstractCegarLoop]: Abstraction has 8076 states and 37749 transitions. [2022-11-18 21:04:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) 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) [2022-11-18 21:04:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 8076 states and 37749 transitions. [2022-11-18 21:04:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:22,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:22,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:22,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:22,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:22,382 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:22,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1997142148, now seen corresponding path program 1 times [2022-11-18 21:04:22,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:22,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107115672] [2022-11-18 21:04:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:04:22,383 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:22,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:22,384 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:22,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-18 21:04:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:04:22,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:22,836 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:22,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:04:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:23,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:24,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:24,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107115672] [2022-11-18 21:04:24,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107115672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:24,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:24,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:04:24,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120411289] [2022-11-18 21:04:24,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:24,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:24,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:24,025 INFO L87 Difference]: Start difference. First operand 8076 states and 37749 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) [2022-11-18 21:04:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:24,272 INFO L93 Difference]: Finished difference Result 8156 states and 38081 transitions. [2022-11-18 21:04:24,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:04:24,273 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 [2022-11-18 21:04:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:24,303 INFO L225 Difference]: With dead ends: 8156 [2022-11-18 21:04:24,304 INFO L226 Difference]: Without dead ends: 8156 [2022-11-18 21:04:24,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:04:24,304 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 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 [2022-11-18 21:04:24,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-18 21:04:24,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2022-11-18 21:04:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 8080. [2022-11-18 21:04:24,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8080 states, 8066 states have (on average 4.681998512273742) internal successors, (37765), 8079 states have internal predecessors, (37765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:24,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8080 states to 8080 states and 37765 transitions. [2022-11-18 21:04:24,495 INFO L78 Accepts]: Start accepts. Automaton has 8080 states and 37765 transitions. Word has length 13 [2022-11-18 21:04:24,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:24,495 INFO L495 AbstractCegarLoop]: Abstraction has 8080 states and 37765 transitions. [2022-11-18 21:04:24,495 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) [2022-11-18 21:04:24,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8080 states and 37765 transitions. [2022-11-18 21:04:24,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:24,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:24,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:24,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-18 21:04:24,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:24,701 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1996885468, now seen corresponding path program 2 times [2022-11-18 21:04:24,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:24,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212181877] [2022-11-18 21:04:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:04:24,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:24,703 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:24,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-18 21:04:25,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:04:25,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:25,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:25,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:25,200 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:25,201 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 [2022-11-18 21:04:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:25,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:26,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:26,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212181877] [2022-11-18 21:04:26,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212181877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:26,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:26,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:04:26,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969989489] [2022-11-18 21:04:26,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:26,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:26,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:26,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:26,324 INFO L87 Difference]: Start difference. First operand 8080 states and 37765 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) [2022-11-18 21:04:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:27,102 INFO L93 Difference]: Finished difference Result 8280 states and 38601 transitions. [2022-11-18 21:04:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:04:27,104 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 [2022-11-18 21:04:27,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:27,135 INFO L225 Difference]: With dead ends: 8280 [2022-11-18 21:04:27,136 INFO L226 Difference]: Without dead ends: 8280 [2022-11-18 21:04:27,136 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 [2022-11-18 21:04:27,136 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:27,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2022-11-18 21:04:27,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8280 states. [2022-11-18 21:04:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8280 to 8118. [2022-11-18 21:04:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8118 states, 8104 states have (on average 4.6785538005923) internal successors, (37915), 8117 states have internal predecessors, (37915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 37915 transitions. [2022-11-18 21:04:27,333 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 37915 transitions. Word has length 13 [2022-11-18 21:04:27,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:27,333 INFO L495 AbstractCegarLoop]: Abstraction has 8118 states and 37915 transitions. [2022-11-18 21:04:27,333 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) [2022-11-18 21:04:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 37915 transitions. [2022-11-18 21:04:27,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:27,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:27,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:27,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:27,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:27,537 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1996738528, now seen corresponding path program 3 times [2022-11-18 21:04:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:27,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422692024] [2022-11-18 21:04:27,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:04:27,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:27,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:04:27,539 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:04:27,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-18 21:04:27,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:04:27,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:04:27,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:04:27,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:04:28,045 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:04:28,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:04:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:28,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:04:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:04:29,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:04:29,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422692024] [2022-11-18 21:04:29,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422692024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:04:29,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:04:29,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:04:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497558362] [2022-11-18 21:04:29,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:04:29,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:04:29,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:04:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:04:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:04:29,114 INFO L87 Difference]: Start difference. First operand 8118 states and 37915 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) [2022-11-18 21:04:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:04:29,803 INFO L93 Difference]: Finished difference Result 8232 states and 38393 transitions. [2022-11-18 21:04:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:04:29,804 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 [2022-11-18 21:04:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:04:29,835 INFO L225 Difference]: With dead ends: 8232 [2022-11-18 21:04:29,835 INFO L226 Difference]: Without dead ends: 8232 [2022-11-18 21:04:29,836 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 [2022-11-18 21:04:29,836 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 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, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:04:29,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 27 Unchecked, 0.6s Time] [2022-11-18 21:04:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2022-11-18 21:04:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8138. [2022-11-18 21:04:30,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8138 states, 8124 states have (on average 4.676883308714919) internal successors, (37995), 8137 states have internal predecessors, (37995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:04:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8138 states to 8138 states and 37995 transitions. [2022-11-18 21:04:30,040 INFO L78 Accepts]: Start accepts. Automaton has 8138 states and 37995 transitions. Word has length 13 [2022-11-18 21:04:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:04:30,040 INFO L495 AbstractCegarLoop]: Abstraction has 8138 states and 37995 transitions. [2022-11-18 21:04:30,040 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) [2022-11-18 21:04:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8138 states and 37995 transitions. [2022-11-18 21:04:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 21:04:30,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:04:30,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:04:30,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-18 21:04:30,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:04:30,244 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:04:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:04:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1866657568, now seen corresponding path program 4 times [2022-11-18 21:04:30,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:04:30,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952886562] [2022-11-18 21:04:30,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:04:30,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-18 21:06:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:27,087 INFO L225 Difference]: With dead ends: 7371 [2022-11-18 21:06:27,087 INFO L226 Difference]: Without dead ends: 7371 [2022-11-18 21:06:27,087 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 [2022-11-18 21:06:27,088 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:27,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2022-11-18 21:06:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-11-18 21:06:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 7099. [2022-11-18 21:06:27,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7091 states have (on average 4.631927795797489) internal successors, (32845), 7098 states have internal predecessors, (32845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 32845 transitions. [2022-11-18 21:06:27,255 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 32845 transitions. Word has length 14 [2022-11-18 21:06:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:27,255 INFO L495 AbstractCegarLoop]: Abstraction has 7099 states and 32845 transitions. [2022-11-18 21:06:27,255 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) [2022-11-18 21:06:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 32845 transitions. [2022-11-18 21:06:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:27,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:27,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:27,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-18 21:06:27,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:27,459 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:27,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1442540992, now seen corresponding path program 1 times [2022-11-18 21:06:27,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:27,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745447516] [2022-11-18 21:06:27,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:27,460 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 [2022-11-18 21:06:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:27,461 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:27,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-18 21:06:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:27,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 21:06:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:06:27,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:06:27,792 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745447516] [2022-11-18 21:06:27,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745447516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:06:27,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:06:27,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 21:06:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488324255] [2022-11-18 21:06:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:06:27,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:06:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:06:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:06:27,793 INFO L87 Difference]: Start difference. First operand 7099 states and 32845 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) [2022-11-18 21:06:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:27,973 INFO L93 Difference]: Finished difference Result 6957 states and 32296 transitions. [2022-11-18 21:06:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:06:27,974 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 [2022-11-18 21:06:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:27,998 INFO L225 Difference]: With dead ends: 6957 [2022-11-18 21:06:27,998 INFO L226 Difference]: Without dead ends: 6957 [2022-11-18 21:06:27,998 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 [2022-11-18 21:06:27,998 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 [2022-11-18 21:06:27,998 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] [2022-11-18 21:06:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2022-11-18 21:06:28,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 6957. [2022-11-18 21:06:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.6455696202531644) internal successors, (32296), 6956 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32296 transitions. [2022-11-18 21:06:28,209 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32296 transitions. Word has length 14 [2022-11-18 21:06:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:28,209 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32296 transitions. [2022-11-18 21:06:28,209 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) [2022-11-18 21:06:28,209 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32296 transitions. [2022-11-18 21:06:28,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:28,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:28,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:28,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:28,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:28,413 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:28,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1442685662, now seen corresponding path program 3 times [2022-11-18 21:06:28,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:28,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034324130] [2022-11-18 21:06:28,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:06:28,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:28,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:28,415 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:28,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-18 21:06:28,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:06:28,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:28,890 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:28,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:06:29,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:06:29,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:29,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034324130] [2022-11-18 21:06:29,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034324130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:29,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:29,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:29,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681822579] [2022-11-18 21:06:29,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:29,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:29,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:29,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:29,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:29,897 INFO L87 Difference]: Start difference. First operand 6957 states and 32296 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) [2022-11-18 21:06:30,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:30,377 INFO L93 Difference]: Finished difference Result 7306 states and 34010 transitions. [2022-11-18 21:06:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:06:30,378 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 [2022-11-18 21:06:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:30,404 INFO L225 Difference]: With dead ends: 7306 [2022-11-18 21:06:30,404 INFO L226 Difference]: Without dead ends: 7306 [2022-11-18 21:06:30,404 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 [2022-11-18 21:06:30,404 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:30,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 17 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-18 21:06:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2022-11-18 21:06:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 6957. [2022-11-18 21:06:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.6455696202531644) internal successors, (32296), 6956 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32296 transitions. [2022-11-18 21:06:30,554 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32296 transitions. Word has length 14 [2022-11-18 21:06:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:30,554 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32296 transitions. [2022-11-18 21:06:30,554 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) [2022-11-18 21:06:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32296 transitions. [2022-11-18 21:06:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:30,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:30,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:30,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Ended with exit code 0 [2022-11-18 21:06:30,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:30,757 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:30,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1609741562, now seen corresponding path program 4 times [2022-11-18 21:06:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:30,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667615848] [2022-11-18 21:06:30,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:06:30,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:30,759 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:30,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-18 21:06:31,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:06:31,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:31,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:31,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:31,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:31,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:06:31,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:06:32,157 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:32,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667615848] [2022-11-18 21:06:32,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667615848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:32,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:32,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:32,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588668535] [2022-11-18 21:06:32,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:32,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:32,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:32,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:32,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:32,158 INFO L87 Difference]: Start difference. First operand 6957 states and 32296 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) [2022-11-18 21:06:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:32,919 INFO L93 Difference]: Finished difference Result 8193 states and 38160 transitions. [2022-11-18 21:06:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:06:32,920 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 [2022-11-18 21:06:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:32,948 INFO L225 Difference]: With dead ends: 8193 [2022-11-18 21:06:32,948 INFO L226 Difference]: Without dead ends: 8193 [2022-11-18 21:06:32,948 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 [2022-11-18 21:06:32,949 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:32,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 43 Unchecked, 0.7s Time] [2022-11-18 21:06:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2022-11-18 21:06:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 6958. [2022-11-18 21:06:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6953 states have (on average 4.645332949805839) internal successors, (32299), 6957 states have internal predecessors, (32299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 32299 transitions. [2022-11-18 21:06:33,118 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 32299 transitions. Word has length 14 [2022-11-18 21:06:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:33,118 INFO L495 AbstractCegarLoop]: Abstraction has 6958 states and 32299 transitions. [2022-11-18 21:06:33,118 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) [2022-11-18 21:06:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 32299 transitions. [2022-11-18 21:06:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:33,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:33,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:33,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-18 21:06:33,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:33,322 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1609870832, now seen corresponding path program 5 times [2022-11-18 21:06:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:33,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073232606] [2022-11-18 21:06:33,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:06:33,322 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:33,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:33,323 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:33,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-18 21:06:33,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:06:33,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:33,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:06:33,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:33,789 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:33,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:34,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:35,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073232606] [2022-11-18 21:06:35,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073232606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:35,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:35,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:06:35,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131355135] [2022-11-18 21:06:35,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:35,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:06:35,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:06:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:06:35,033 INFO L87 Difference]: Start difference. First operand 6958 states and 32299 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) [2022-11-18 21:06:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:35,755 INFO L93 Difference]: Finished difference Result 8616 states and 40200 transitions. [2022-11-18 21:06:35,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:06:35,757 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 [2022-11-18 21:06:35,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:35,783 INFO L225 Difference]: With dead ends: 8616 [2022-11-18 21:06:35,784 INFO L226 Difference]: Without dead ends: 8616 [2022-11-18 21:06:35,784 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 [2022-11-18 21:06:35,784 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:35,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-11-18 21:06:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8616 states. [2022-11-18 21:06:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8616 to 6957. [2022-11-18 21:06:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.6455696202531644) internal successors, (32296), 6956 states have internal predecessors, (32296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32296 transitions. [2022-11-18 21:06:35,943 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32296 transitions. Word has length 14 [2022-11-18 21:06:35,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:35,943 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32296 transitions. [2022-11-18 21:06:35,943 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) [2022-11-18 21:06:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32296 transitions. [2022-11-18 21:06:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:35,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:35,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:35,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:36,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:36,147 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:36,147 INFO L85 PathProgramCache]: Analyzing trace with hash 736879806, now seen corresponding path program 6 times [2022-11-18 21:06:36,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:36,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909948974] [2022-11-18 21:06:36,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:06:36,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:36,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:36,148 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:36,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-18 21:06:36,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:06:36,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:36,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:36,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:36,601 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:36,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:36,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:37,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:37,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909948974] [2022-11-18 21:06:37,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909948974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:37,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:37,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357437128] [2022-11-18 21:06:37,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:37,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:37,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:37,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:37,548 INFO L87 Difference]: Start difference. First operand 6957 states and 32296 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) [2022-11-18 21:06:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:38,174 INFO L93 Difference]: Finished difference Result 8006 states and 37359 transitions. [2022-11-18 21:06:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:06:38,176 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 [2022-11-18 21:06:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:38,202 INFO L225 Difference]: With dead ends: 8006 [2022-11-18 21:06:38,202 INFO L226 Difference]: Without dead ends: 8006 [2022-11-18 21:06:38,203 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 [2022-11-18 21:06:38,203 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:38,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2022-11-18 21:06:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2022-11-18 21:06:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 6956. [2022-11-18 21:06:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 6951 states have (on average 4.648108185872537) internal successors, (32309), 6955 states have internal predecessors, (32309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 32309 transitions. [2022-11-18 21:06:38,368 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 32309 transitions. Word has length 14 [2022-11-18 21:06:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:38,368 INFO L495 AbstractCegarLoop]: Abstraction has 6956 states and 32309 transitions. [2022-11-18 21:06:38,368 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) [2022-11-18 21:06:38,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 32309 transitions. [2022-11-18 21:06:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:38,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:38,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:38,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Ended with exit code 0 [2022-11-18 21:06:38,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:38,572 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash 732872436, now seen corresponding path program 7 times [2022-11-18 21:06:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:38,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242932965] [2022-11-18 21:06:38,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:06:38,573 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 [2022-11-18 21:06:38,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:38,573 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:38,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-18 21:06:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:38,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:38,981 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:38,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:39,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:39,911 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:39,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242932965] [2022-11-18 21:06:39,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242932965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:39,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:39,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:39,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792889224] [2022-11-18 21:06:39,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:39,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:39,912 INFO L87 Difference]: Start difference. First operand 6956 states and 32309 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) [2022-11-18 21:06:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:40,535 INFO L93 Difference]: Finished difference Result 7851 states and 36674 transitions. [2022-11-18 21:06:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:06:40,536 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 [2022-11-18 21:06:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:40,560 INFO L225 Difference]: With dead ends: 7851 [2022-11-18 21:06:40,560 INFO L226 Difference]: Without dead ends: 7851 [2022-11-18 21:06:40,560 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 [2022-11-18 21:06:40,560 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:40,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 121 Unchecked, 0.5s Time] [2022-11-18 21:06:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2022-11-18 21:06:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 6956. [2022-11-18 21:06:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6956 states, 6951 states have (on average 4.648108185872537) internal successors, (32309), 6955 states have internal predecessors, (32309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6956 states to 6956 states and 32309 transitions. [2022-11-18 21:06:40,769 INFO L78 Accepts]: Start accepts. Automaton has 6956 states and 32309 transitions. Word has length 14 [2022-11-18 21:06:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:40,769 INFO L495 AbstractCegarLoop]: Abstraction has 6956 states and 32309 transitions. [2022-11-18 21:06:40,769 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) [2022-11-18 21:06:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6956 states and 32309 transitions. [2022-11-18 21:06:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:40,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:40,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:40,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-18 21:06:40,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:40,973 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:40,974 INFO L85 PathProgramCache]: Analyzing trace with hash 732863136, now seen corresponding path program 8 times [2022-11-18 21:06:40,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:40,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627551931] [2022-11-18 21:06:40,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:06:40,974 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:40,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:40,975 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:40,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-18 21:06:41,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:06:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:41,405 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:41,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:41,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:42,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:42,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627551931] [2022-11-18 21:06:42,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627551931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:42,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:42,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:42,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056301370] [2022-11-18 21:06:42,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:42,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:42,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:42,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:42,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:42,320 INFO L87 Difference]: Start difference. First operand 6956 states and 32309 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) [2022-11-18 21:06:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:42,491 INFO L93 Difference]: Finished difference Result 7258 states and 33749 transitions. [2022-11-18 21:06:42,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:06:42,492 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 [2022-11-18 21:06:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:42,515 INFO L225 Difference]: With dead ends: 7258 [2022-11-18 21:06:42,515 INFO L226 Difference]: Without dead ends: 7258 [2022-11-18 21:06:42,516 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 [2022-11-18 21:06:42,516 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:42,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-18 21:06:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2022-11-18 21:06:42,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 6957. [2022-11-18 21:06:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6957 states, 6952 states have (on average 4.647871116225547) internal successors, (32312), 6956 states have internal predecessors, (32312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:42,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6957 states to 6957 states and 32312 transitions. [2022-11-18 21:06:42,656 INFO L78 Accepts]: Start accepts. Automaton has 6957 states and 32312 transitions. Word has length 14 [2022-11-18 21:06:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:42,656 INFO L495 AbstractCegarLoop]: Abstraction has 6957 states and 32312 transitions. [2022-11-18 21:06:42,656 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) [2022-11-18 21:06:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6957 states and 32312 transitions. [2022-11-18 21:06:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:42,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:42,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:42,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Ended with exit code 0 [2022-11-18 21:06:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:42,860 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash 736711476, now seen corresponding path program 9 times [2022-11-18 21:06:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:42,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110155204] [2022-11-18 21:06:42,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:06:42,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:42,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:42,861 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:42,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-18 21:06:43,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:06:43,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:43,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:43,307 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:43,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:43,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:43,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:44,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:44,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110155204] [2022-11-18 21:06:44,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110155204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:44,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:44,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:44,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289295543] [2022-11-18 21:06:44,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:44,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:44,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:44,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:44,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:44,238 INFO L87 Difference]: Start difference. First operand 6957 states and 32312 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) [2022-11-18 21:06:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:44,865 INFO L93 Difference]: Finished difference Result 8263 states and 38578 transitions. [2022-11-18 21:06:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:06:44,867 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 [2022-11-18 21:06:44,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:44,892 INFO L225 Difference]: With dead ends: 8263 [2022-11-18 21:06:44,892 INFO L226 Difference]: Without dead ends: 8263 [2022-11-18 21:06:44,892 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 [2022-11-18 21:06:44,893 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:44,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-11-18 21:06:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2022-11-18 21:06:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 7129. [2022-11-18 21:06:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7129 states, 7124 states have (on average 4.660303200449186) internal successors, (33200), 7128 states have internal predecessors, (33200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7129 states to 7129 states and 33200 transitions. [2022-11-18 21:06:45,046 INFO L78 Accepts]: Start accepts. Automaton has 7129 states and 33200 transitions. Word has length 14 [2022-11-18 21:06:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:45,046 INFO L495 AbstractCegarLoop]: Abstraction has 7129 states and 33200 transitions. [2022-11-18 21:06:45,046 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) [2022-11-18 21:06:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7129 states and 33200 transitions. [2022-11-18 21:06:45,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:45,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:45,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:45,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Ended with exit code 0 [2022-11-18 21:06:45,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:45,250 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash 766818149, now seen corresponding path program 1 times [2022-11-18 21:06:45,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:45,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178900927] [2022-11-18 21:06:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:45,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:45,252 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:45,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-18 21:06:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:45,662 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:45,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:45,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:46,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178900927] [2022-11-18 21:06:46,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178900927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:46,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:46,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256418347] [2022-11-18 21:06:46,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:46,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:46,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:46,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:46,543 INFO L87 Difference]: Start difference. First operand 7129 states and 33200 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) [2022-11-18 21:06:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:46,958 INFO L93 Difference]: Finished difference Result 7511 states and 35084 transitions. [2022-11-18 21:06:46,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:06:46,960 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 [2022-11-18 21:06:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:46,982 INFO L225 Difference]: With dead ends: 7511 [2022-11-18 21:06:46,983 INFO L226 Difference]: Without dead ends: 7511 [2022-11-18 21:06:46,983 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 [2022-11-18 21:06:46,983 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:46,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-11-18 21:06:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7511 states. [2022-11-18 21:06:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7511 to 7131. [2022-11-18 21:06:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7131 states, 7126 states have (on average 4.660117878192534) internal successors, (33208), 7130 states have internal predecessors, (33208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7131 states to 7131 states and 33208 transitions. [2022-11-18 21:06:47,134 INFO L78 Accepts]: Start accepts. Automaton has 7131 states and 33208 transitions. Word has length 14 [2022-11-18 21:06:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:47,135 INFO L495 AbstractCegarLoop]: Abstraction has 7131 states and 33208 transitions. [2022-11-18 21:06:47,135 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) [2022-11-18 21:06:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 7131 states and 33208 transitions. [2022-11-18 21:06:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:47,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:47,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:47,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:47,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:47,339 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash 762617618, now seen corresponding path program 1 times [2022-11-18 21:06:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:47,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903684843] [2022-11-18 21:06:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:06:47,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:47,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:47,340 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:47,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-18 21:06:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:06:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:47,763 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:47,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:48,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:48,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:48,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903684843] [2022-11-18 21:06:48,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903684843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:48,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:48,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:48,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103337853] [2022-11-18 21:06:48,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:48,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:48,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:48,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:48,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:48,660 INFO L87 Difference]: Start difference. First operand 7131 states and 33208 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) [2022-11-18 21:06:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:48,829 INFO L93 Difference]: Finished difference Result 7510 states and 35222 transitions. [2022-11-18 21:06:48,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:06:48,831 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 [2022-11-18 21:06:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:48,854 INFO L225 Difference]: With dead ends: 7510 [2022-11-18 21:06:48,854 INFO L226 Difference]: Without dead ends: 7510 [2022-11-18 21:06:48,854 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 [2022-11-18 21:06:48,854 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:48,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-18 21:06:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7510 states. [2022-11-18 21:06:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7510 to 7132. [2022-11-18 21:06:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7132 states, 7127 states have (on average 4.660165567559983) internal successors, (33213), 7131 states have internal predecessors, (33213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7132 states to 7132 states and 33213 transitions. [2022-11-18 21:06:49,009 INFO L78 Accepts]: Start accepts. Automaton has 7132 states and 33213 transitions. Word has length 14 [2022-11-18 21:06:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:49,009 INFO L495 AbstractCegarLoop]: Abstraction has 7132 states and 33213 transitions. [2022-11-18 21:06:49,009 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) [2022-11-18 21:06:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 7132 states and 33213 transitions. [2022-11-18 21:06:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:49,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:49,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:49,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:49,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:49,213 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash 762349499, now seen corresponding path program 2 times [2022-11-18 21:06:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784860317] [2022-11-18 21:06:49,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:06:49,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:49,215 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:49,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-18 21:06:49,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:06:49,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:49,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:49,682 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:49,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:50,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:50,656 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:50,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784860317] [2022-11-18 21:06:50,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784860317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:50,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:50,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291619393] [2022-11-18 21:06:50,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:50,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:50,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:50,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:50,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:50,658 INFO L87 Difference]: Start difference. First operand 7132 states and 33213 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) [2022-11-18 21:06:51,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:51,086 INFO L93 Difference]: Finished difference Result 7602 states and 35544 transitions. [2022-11-18 21:06:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:06:51,088 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 [2022-11-18 21:06:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:51,112 INFO L225 Difference]: With dead ends: 7602 [2022-11-18 21:06:51,112 INFO L226 Difference]: Without dead ends: 7602 [2022-11-18 21:06:51,112 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 [2022-11-18 21:06:51,113 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:51,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-18 21:06:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7602 states. [2022-11-18 21:06:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7602 to 7215. [2022-11-18 21:06:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7215 states, 7210 states have (on average 4.661581137309293) internal successors, (33610), 7214 states have internal predecessors, (33610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7215 states to 7215 states and 33610 transitions. [2022-11-18 21:06:51,344 INFO L78 Accepts]: Start accepts. Automaton has 7215 states and 33610 transitions. Word has length 14 [2022-11-18 21:06:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:51,344 INFO L495 AbstractCegarLoop]: Abstraction has 7215 states and 33610 transitions. [2022-11-18 21:06:51,345 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) [2022-11-18 21:06:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 7215 states and 33610 transitions. [2022-11-18 21:06:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:51,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:51,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:51,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Ended with exit code 0 [2022-11-18 21:06:51,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:51,548 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:51,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:51,549 INFO L85 PathProgramCache]: Analyzing trace with hash 762365309, now seen corresponding path program 3 times [2022-11-18 21:06:51,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:51,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869458834] [2022-11-18 21:06:51,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:06:51,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:51,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:51,550 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:51,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-18 21:06:51,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:06:51,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:51,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:51,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:52,084 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:52,084 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 [2022-11-18 21:06:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:52,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:53,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869458834] [2022-11-18 21:06:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869458834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:53,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:53,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:53,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444585497] [2022-11-18 21:06:53,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:53,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:53,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:53,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:53,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:53,019 INFO L87 Difference]: Start difference. First operand 7215 states and 33610 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) [2022-11-18 21:06:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:53,478 INFO L93 Difference]: Finished difference Result 7622 states and 35644 transitions. [2022-11-18 21:06:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:06:53,479 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 [2022-11-18 21:06:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:53,512 INFO L225 Difference]: With dead ends: 7622 [2022-11-18 21:06:53,513 INFO L226 Difference]: Without dead ends: 7622 [2022-11-18 21:06:53,513 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 [2022-11-18 21:06:53,513 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:53,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2022-11-18 21:06:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7622 states. [2022-11-18 21:06:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7622 to 7242. [2022-11-18 21:06:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 7237 states have (on average 4.665607295840818) internal successors, (33765), 7241 states have internal predecessors, (33765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 33765 transitions. [2022-11-18 21:06:53,672 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 33765 transitions. Word has length 14 [2022-11-18 21:06:53,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:53,672 INFO L495 AbstractCegarLoop]: Abstraction has 7242 states and 33765 transitions. [2022-11-18 21:06:53,673 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) [2022-11-18 21:06:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 33765 transitions. [2022-11-18 21:06:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:53,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:53,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:53,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Ended with exit code 0 [2022-11-18 21:06:53,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:53,876 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:53,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:53,876 INFO L85 PathProgramCache]: Analyzing trace with hash 762360938, now seen corresponding path program 2 times [2022-11-18 21:06:53,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:53,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022517485] [2022-11-18 21:06:53,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:06:53,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:53,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:53,878 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:53,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-18 21:06:54,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:06:54,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:54,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:54,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:54,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:55,294 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:55,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022517485] [2022-11-18 21:06:55,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022517485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:55,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:55,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016065740] [2022-11-18 21:06:55,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:55,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:55,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:55,295 INFO L87 Difference]: Start difference. First operand 7242 states and 33765 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) [2022-11-18 21:06:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:55,717 INFO L93 Difference]: Finished difference Result 7790 states and 36718 transitions. [2022-11-18 21:06:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:06:55,719 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 [2022-11-18 21:06:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:55,744 INFO L225 Difference]: With dead ends: 7790 [2022-11-18 21:06:55,744 INFO L226 Difference]: Without dead ends: 7790 [2022-11-18 21:06:55,744 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 [2022-11-18 21:06:55,744 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:55,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-18 21:06:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2022-11-18 21:06:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7349. [2022-11-18 21:06:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7344 states have (on average 4.681236383442266) internal successors, (34379), 7348 states have internal predecessors, (34379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 34379 transitions. [2022-11-18 21:06:55,900 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 34379 transitions. Word has length 14 [2022-11-18 21:06:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:55,900 INFO L495 AbstractCegarLoop]: Abstraction has 7349 states and 34379 transitions. [2022-11-18 21:06:55,900 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) [2022-11-18 21:06:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 34379 transitions. [2022-11-18 21:06:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:55,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:55,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:55,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-18 21:06:56,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:56,104 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:56,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:56,104 INFO L85 PathProgramCache]: Analyzing trace with hash 762365526, now seen corresponding path program 10 times [2022-11-18 21:06:56,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:56,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842510546] [2022-11-18 21:06:56,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:06:56,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:56,105 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:56,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-18 21:06:56,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:06:56,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:56,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:56,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:56,528 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:56,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:06:56,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:56,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:57,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:57,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842510546] [2022-11-18 21:06:57,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842510546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:57,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:57,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:57,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663108524] [2022-11-18 21:06:57,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:57,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:57,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:57,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:57,443 INFO L87 Difference]: Start difference. First operand 7349 states and 34379 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) [2022-11-18 21:06:57,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:06:57,894 INFO L93 Difference]: Finished difference Result 7607 states and 35660 transitions. [2022-11-18 21:06:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:06:57,895 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 [2022-11-18 21:06:57,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:06:57,918 INFO L225 Difference]: With dead ends: 7607 [2022-11-18 21:06:57,918 INFO L226 Difference]: Without dead ends: 7607 [2022-11-18 21:06:57,918 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 [2022-11-18 21:06:57,918 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:06:57,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-11-18 21:06:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2022-11-18 21:06:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 7349. [2022-11-18 21:06:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7349 states, 7344 states have (on average 4.681236383442266) internal successors, (34379), 7348 states have internal predecessors, (34379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:06:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7349 states to 7349 states and 34379 transitions. [2022-11-18 21:06:58,074 INFO L78 Accepts]: Start accepts. Automaton has 7349 states and 34379 transitions. Word has length 14 [2022-11-18 21:06:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:06:58,074 INFO L495 AbstractCegarLoop]: Abstraction has 7349 states and 34379 transitions. [2022-11-18 21:06:58,074 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) [2022-11-18 21:06:58,074 INFO L276 IsEmpty]: Start isEmpty. Operand 7349 states and 34379 transitions. [2022-11-18 21:06:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:06:58,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:06:58,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:06:58,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Ended with exit code 0 [2022-11-18 21:06:58,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:58,278 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:06:58,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:06:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 762213998, now seen corresponding path program 3 times [2022-11-18 21:06:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:06:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195713257] [2022-11-18 21:06:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:06:58,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:06:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:06:58,279 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:06:58,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-18 21:06:58,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:06:58,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:06:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:06:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:06:58,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:06:58,749 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 [2022-11-18 21:06:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:59,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:06:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:06:59,693 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:06:59,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195713257] [2022-11-18 21:06:59,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195713257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:06:59,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:06:59,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:06:59,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364116406] [2022-11-18 21:06:59,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:06:59,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:06:59,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:06:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:06:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:06:59,694 INFO L87 Difference]: Start difference. First operand 7349 states and 34379 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) [2022-11-18 21:07:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:00,199 INFO L93 Difference]: Finished difference Result 7773 states and 36638 transitions. [2022-11-18 21:07:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:00,201 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 [2022-11-18 21:07:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:00,229 INFO L225 Difference]: With dead ends: 7773 [2022-11-18 21:07:00,229 INFO L226 Difference]: Without dead ends: 7773 [2022-11-18 21:07:00,229 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 [2022-11-18 21:07:00,229 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:00,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 25 Unchecked, 0.4s Time] [2022-11-18 21:07:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2022-11-18 21:07:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 7427. [2022-11-18 21:07:00,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7427 states, 7422 states have (on average 4.692670439234708) internal successors, (34829), 7426 states have internal predecessors, (34829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:00,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7427 states to 7427 states and 34829 transitions. [2022-11-18 21:07:00,407 INFO L78 Accepts]: Start accepts. Automaton has 7427 states and 34829 transitions. Word has length 14 [2022-11-18 21:07:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:00,407 INFO L495 AbstractCegarLoop]: Abstraction has 7427 states and 34829 transitions. [2022-11-18 21:07:00,407 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) [2022-11-18 21:07:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7427 states and 34829 transitions. [2022-11-18 21:07:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:00,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:00,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:00,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:00,611 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash 762356226, now seen corresponding path program 11 times [2022-11-18 21:07:00,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283906417] [2022-11-18 21:07:00,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:07:00,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:00,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:00,613 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:00,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-18 21:07:01,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:01,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:01,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:07:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:01,205 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:01,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:01,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:02,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:02,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283906417] [2022-11-18 21:07:02,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283906417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:02,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:02,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:07:02,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068969336] [2022-11-18 21:07:02,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:02,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:02,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:02,533 INFO L87 Difference]: Start difference. First operand 7427 states and 34829 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) [2022-11-18 21:07:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:03,100 INFO L93 Difference]: Finished difference Result 7697 states and 36151 transitions. [2022-11-18 21:07:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:03,102 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 [2022-11-18 21:07:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:03,129 INFO L225 Difference]: With dead ends: 7697 [2022-11-18 21:07:03,130 INFO L226 Difference]: Without dead ends: 7697 [2022-11-18 21:07:03,130 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 [2022-11-18 21:07:03,130 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:03,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 39 Unchecked, 0.4s Time] [2022-11-18 21:07:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7697 states. [2022-11-18 21:07:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7697 to 7427. [2022-11-18 21:07:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7427 states, 7422 states have (on average 4.692670439234708) internal successors, (34829), 7426 states have internal predecessors, (34829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7427 states to 7427 states and 34829 transitions. [2022-11-18 21:07:03,399 INFO L78 Accepts]: Start accepts. Automaton has 7427 states and 34829 transitions. Word has length 14 [2022-11-18 21:07:03,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:03,399 INFO L495 AbstractCegarLoop]: Abstraction has 7427 states and 34829 transitions. [2022-11-18 21:07:03,399 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) [2022-11-18 21:07:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 7427 states and 34829 transitions. [2022-11-18 21:07:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:03,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:03,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:03,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:03,603 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:03,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:03,604 INFO L85 PathProgramCache]: Analyzing trace with hash -121400078, now seen corresponding path program 12 times [2022-11-18 21:07:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083499803] [2022-11-18 21:07:03,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:07:03,605 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 [2022-11-18 21:07:03,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:03,606 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:03,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-18 21:07:03,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:07:03,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:03,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:04,131 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:04,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:04,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:05,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:05,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083499803] [2022-11-18 21:07:05,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083499803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:05,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:05,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412592051] [2022-11-18 21:07:05,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:05,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:05,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:05,262 INFO L87 Difference]: Start difference. First operand 7427 states and 34829 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) [2022-11-18 21:07:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:05,957 INFO L93 Difference]: Finished difference Result 9257 states and 43863 transitions. [2022-11-18 21:07:05,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:05,959 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 [2022-11-18 21:07:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:05,992 INFO L225 Difference]: With dead ends: 9257 [2022-11-18 21:07:05,992 INFO L226 Difference]: Without dead ends: 9257 [2022-11-18 21:07:05,992 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 [2022-11-18 21:07:05,993 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:05,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 64 Unchecked, 0.6s Time] [2022-11-18 21:07:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9257 states. [2022-11-18 21:07:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9257 to 8055. [2022-11-18 21:07:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8055 states, 8050 states have (on average 4.736521739130435) internal successors, (38129), 8054 states have internal predecessors, (38129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8055 states to 8055 states and 38129 transitions. [2022-11-18 21:07:06,193 INFO L78 Accepts]: Start accepts. Automaton has 8055 states and 38129 transitions. Word has length 14 [2022-11-18 21:07:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:06,194 INFO L495 AbstractCegarLoop]: Abstraction has 8055 states and 38129 transitions. [2022-11-18 21:07:06,194 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) [2022-11-18 21:07:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8055 states and 38129 transitions. [2022-11-18 21:07:06,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:06,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:06,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:06,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:06,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:06,398 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash -121568408, now seen corresponding path program 13 times [2022-11-18 21:07:06,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:06,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738299527] [2022-11-18 21:07:06,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:07:06,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:06,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:06,400 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:06,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-18 21:07:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:06,894 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:06,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:07,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:07,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:07,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738299527] [2022-11-18 21:07:07,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738299527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:07,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:07,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796685752] [2022-11-18 21:07:07,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:07,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:07,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:07,925 INFO L87 Difference]: Start difference. First operand 8055 states and 38129 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) [2022-11-18 21:07:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:08,738 INFO L93 Difference]: Finished difference Result 9339 states and 44357 transitions. [2022-11-18 21:07:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:08,740 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 [2022-11-18 21:07:08,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:08,774 INFO L225 Difference]: With dead ends: 9339 [2022-11-18 21:07:08,774 INFO L226 Difference]: Without dead ends: 9339 [2022-11-18 21:07:08,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:08,775 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:08,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 27 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-11-18 21:07:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9339 states. [2022-11-18 21:07:08,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9339 to 8037. [2022-11-18 21:07:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8037 states, 8032 states have (on average 4.739292828685259) internal successors, (38066), 8036 states have internal predecessors, (38066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:08,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8037 states to 8037 states and 38066 transitions. [2022-11-18 21:07:08,979 INFO L78 Accepts]: Start accepts. Automaton has 8037 states and 38066 transitions. Word has length 14 [2022-11-18 21:07:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:08,979 INFO L495 AbstractCegarLoop]: Abstraction has 8037 states and 38066 transitions. [2022-11-18 21:07:08,979 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) [2022-11-18 21:07:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 8037 states and 38066 transitions. [2022-11-18 21:07:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:08,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:08,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:08,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:09,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:09,183 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:09,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:09,184 INFO L85 PathProgramCache]: Analyzing trace with hash -533401621, now seen corresponding path program 4 times [2022-11-18 21:07:09,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:09,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685986781] [2022-11-18 21:07:09,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:07:09,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:09,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:09,186 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:09,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-18 21:07:09,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:07:09,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:09,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:09,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:09,702 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:09,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:10,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:10,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:10,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685986781] [2022-11-18 21:07:10,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685986781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:10,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:10,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:10,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879157233] [2022-11-18 21:07:10,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:10,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:10,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:10,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:10,807 INFO L87 Difference]: Start difference. First operand 8037 states and 38066 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) [2022-11-18 21:07:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:11,442 INFO L93 Difference]: Finished difference Result 8510 states and 40323 transitions. [2022-11-18 21:07:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:07:11,444 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 [2022-11-18 21:07:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:11,476 INFO L225 Difference]: With dead ends: 8510 [2022-11-18 21:07:11,476 INFO L226 Difference]: Without dead ends: 8510 [2022-11-18 21:07:11,476 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 [2022-11-18 21:07:11,476 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:11,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-11-18 21:07:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8510 states. [2022-11-18 21:07:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8510 to 8037. [2022-11-18 21:07:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8037 states, 8032 states have (on average 4.739168326693227) internal successors, (38065), 8036 states have internal predecessors, (38065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8037 states to 8037 states and 38065 transitions. [2022-11-18 21:07:11,674 INFO L78 Accepts]: Start accepts. Automaton has 8037 states and 38065 transitions. Word has length 14 [2022-11-18 21:07:11,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:11,674 INFO L495 AbstractCegarLoop]: Abstraction has 8037 states and 38065 transitions. [2022-11-18 21:07:11,674 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) [2022-11-18 21:07:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 8037 states and 38065 transitions. [2022-11-18 21:07:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:11,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:11,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:11,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:11,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:11,882 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:11,883 INFO L85 PathProgramCache]: Analyzing trace with hash -537602152, now seen corresponding path program 4 times [2022-11-18 21:07:11,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:11,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066317049] [2022-11-18 21:07:11,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:07:11,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:11,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:11,885 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:11,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Waiting until timeout for monitored process [2022-11-18 21:07:12,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:07:12,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:12,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:12,394 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:12,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:12,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:13,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:13,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066317049] [2022-11-18 21:07:13,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066317049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:13,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:13,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:13,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680274586] [2022-11-18 21:07:13,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:13,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:13,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:13,486 INFO L87 Difference]: Start difference. First operand 8037 states and 38065 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) [2022-11-18 21:07:14,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:14,101 INFO L93 Difference]: Finished difference Result 8527 states and 40404 transitions. [2022-11-18 21:07:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:07:14,103 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 [2022-11-18 21:07:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:14,135 INFO L225 Difference]: With dead ends: 8527 [2022-11-18 21:07:14,135 INFO L226 Difference]: Without dead ends: 8527 [2022-11-18 21:07:14,135 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 [2022-11-18 21:07:14,136 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 28 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 [2022-11-18 21:07:14,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 28 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 74 Unchecked, 0.5s Time] [2022-11-18 21:07:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2022-11-18 21:07:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8038. [2022-11-18 21:07:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8038 states, 8033 states have (on average 4.739200796713557) internal successors, (38070), 8037 states have internal predecessors, (38070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8038 states to 8038 states and 38070 transitions. [2022-11-18 21:07:14,335 INFO L78 Accepts]: Start accepts. Automaton has 8038 states and 38070 transitions. Word has length 14 [2022-11-18 21:07:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:14,336 INFO L495 AbstractCegarLoop]: Abstraction has 8038 states and 38070 transitions. [2022-11-18 21:07:14,336 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) [2022-11-18 21:07:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 8038 states and 38070 transitions. [2022-11-18 21:07:14,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:14,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:14,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:14,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (129)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:14,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:14,541 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash -532645314, now seen corresponding path program 14 times [2022-11-18 21:07:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:14,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703854111] [2022-11-18 21:07:14,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:07:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:14,543 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:14,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-18 21:07:14,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:14,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:15,074 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:15,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:07:15,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:07:16,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:16,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703854111] [2022-11-18 21:07:16,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703854111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:16,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:16,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482654937] [2022-11-18 21:07:16,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:16,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:16,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:16,211 INFO L87 Difference]: Start difference. First operand 8038 states and 38070 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) [2022-11-18 21:07:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:16,592 INFO L93 Difference]: Finished difference Result 9150 states and 43423 transitions. [2022-11-18 21:07:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:16,593 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 [2022-11-18 21:07:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:16,634 INFO L225 Difference]: With dead ends: 9150 [2022-11-18 21:07:16,634 INFO L226 Difference]: Without dead ends: 9150 [2022-11-18 21:07:16,635 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 [2022-11-18 21:07:16,635 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:16,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 26 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-11-18 21:07:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9150 states. [2022-11-18 21:07:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9150 to 8683. [2022-11-18 21:07:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8683 states, 8678 states have (on average 4.765383728969809) internal successors, (41354), 8682 states have internal predecessors, (41354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8683 states to 8683 states and 41354 transitions. [2022-11-18 21:07:16,841 INFO L78 Accepts]: Start accepts. Automaton has 8683 states and 41354 transitions. Word has length 14 [2022-11-18 21:07:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:16,841 INFO L495 AbstractCegarLoop]: Abstraction has 8683 states and 41354 transitions. [2022-11-18 21:07:16,842 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) [2022-11-18 21:07:16,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8683 states and 41354 transitions. [2022-11-18 21:07:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:16,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:16,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:16,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:17,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:17,046 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash -396356604, now seen corresponding path program 15 times [2022-11-18 21:07:17,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454039022] [2022-11-18 21:07:17,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:07:17,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:17,047 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:17,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-18 21:07:17,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:07:17,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:17,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:17,577 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:17,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:17,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:18,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:18,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454039022] [2022-11-18 21:07:18,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454039022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:18,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:18,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:18,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399356460] [2022-11-18 21:07:18,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:18,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:18,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:18,692 INFO L87 Difference]: Start difference. First operand 8683 states and 41354 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) [2022-11-18 21:07:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:19,737 INFO L93 Difference]: Finished difference Result 9534 states and 45411 transitions. [2022-11-18 21:07:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:19,739 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 [2022-11-18 21:07:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:19,775 INFO L225 Difference]: With dead ends: 9534 [2022-11-18 21:07:19,775 INFO L226 Difference]: Without dead ends: 9534 [2022-11-18 21:07:19,775 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 [2022-11-18 21:07:19,775 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:19,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 132 Unchecked, 0.9s Time] [2022-11-18 21:07:19,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9534 states. [2022-11-18 21:07:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 8680. [2022-11-18 21:07:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8680 states, 8675 states have (on average 4.76564841498559) internal successors, (41342), 8679 states have internal predecessors, (41342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:20,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8680 states to 8680 states and 41342 transitions. [2022-11-18 21:07:20,027 INFO L78 Accepts]: Start accepts. Automaton has 8680 states and 41342 transitions. Word has length 14 [2022-11-18 21:07:20,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:20,027 INFO L495 AbstractCegarLoop]: Abstraction has 8680 states and 41342 transitions. [2022-11-18 21:07:20,028 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) [2022-11-18 21:07:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8680 states and 41342 transitions. [2022-11-18 21:07:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:20,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:20,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:20,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:20,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:20,232 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash 519403949, now seen corresponding path program 5 times [2022-11-18 21:07:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:20,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955464688] [2022-11-18 21:07:20,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:07:20,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:20,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:20,234 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:20,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-18 21:07:20,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:20,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:20,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:07:20,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:20,781 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:20,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:21,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:22,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:22,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955464688] [2022-11-18 21:07:22,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955464688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:22,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:22,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:07:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439004794] [2022-11-18 21:07:22,132 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:22,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:22,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:22,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:22,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:22,133 INFO L87 Difference]: Start difference. First operand 8680 states and 41342 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) [2022-11-18 21:07:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:22,855 INFO L93 Difference]: Finished difference Result 8991 states and 42781 transitions. [2022-11-18 21:07:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:07:22,857 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 [2022-11-18 21:07:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:22,891 INFO L225 Difference]: With dead ends: 8991 [2022-11-18 21:07:22,891 INFO L226 Difference]: Without dead ends: 8991 [2022-11-18 21:07:22,891 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 [2022-11-18 21:07:22,891 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:22,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-11-18 21:07:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8991 states. [2022-11-18 21:07:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8991 to 8683. [2022-11-18 21:07:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8683 states, 8678 states have (on average 4.765383728969809) internal successors, (41354), 8682 states have internal predecessors, (41354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8683 states to 8683 states and 41354 transitions. [2022-11-18 21:07:23,110 INFO L78 Accepts]: Start accepts. Automaton has 8683 states and 41354 transitions. Word has length 14 [2022-11-18 21:07:23,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:23,111 INFO L495 AbstractCegarLoop]: Abstraction has 8683 states and 41354 transitions. [2022-11-18 21:07:23,111 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) [2022-11-18 21:07:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 8683 states and 41354 transitions. [2022-11-18 21:07:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:23,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:23,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:23,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-18 21:07:23,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:23,315 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:23,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash 519412319, now seen corresponding path program 6 times [2022-11-18 21:07:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:23,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295822918] [2022-11-18 21:07:23,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:07:23,316 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 [2022-11-18 21:07:23,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:23,317 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:23,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Waiting until timeout for monitored process [2022-11-18 21:07:23,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:07:23,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:23,921 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:23,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:24,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:25,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:25,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295822918] [2022-11-18 21:07:25,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295822918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:25,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:25,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:25,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351060988] [2022-11-18 21:07:25,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:25,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:25,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:25,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:25,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:25,069 INFO L87 Difference]: Start difference. First operand 8683 states and 41354 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) [2022-11-18 21:07:25,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:25,936 INFO L93 Difference]: Finished difference Result 9317 states and 44278 transitions. [2022-11-18 21:07:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:25,938 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 [2022-11-18 21:07:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:25,974 INFO L225 Difference]: With dead ends: 9317 [2022-11-18 21:07:25,974 INFO L226 Difference]: Without dead ends: 9317 [2022-11-18 21:07:25,974 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 [2022-11-18 21:07:25,975 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:25,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 22 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 77 Unchecked, 0.7s Time] [2022-11-18 21:07:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9317 states. [2022-11-18 21:07:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9317 to 8761. [2022-11-18 21:07:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8761 states, 8756 states have (on average 4.762905436272271) internal successors, (41704), 8760 states have internal predecessors, (41704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8761 states to 8761 states and 41704 transitions. [2022-11-18 21:07:26,194 INFO L78 Accepts]: Start accepts. Automaton has 8761 states and 41704 transitions. Word has length 14 [2022-11-18 21:07:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:26,194 INFO L495 AbstractCegarLoop]: Abstraction has 8761 states and 41704 transitions. [2022-11-18 21:07:26,194 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) [2022-11-18 21:07:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 8761 states and 41704 transitions. [2022-11-18 21:07:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:26,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:26,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:26,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (133)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:26,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:26,414 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash 389195858, now seen corresponding path program 5 times [2022-11-18 21:07:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323056782] [2022-11-18 21:07:26,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:07:26,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:26,416 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:26,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-18 21:07:26,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:26,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:07:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:26,985 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:26,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:27,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:28,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:28,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323056782] [2022-11-18 21:07:28,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323056782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:28,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:28,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:07:28,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707712411] [2022-11-18 21:07:28,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:28,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:28,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:28,345 INFO L87 Difference]: Start difference. First operand 8761 states and 41704 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) [2022-11-18 21:07:28,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:28,946 INFO L93 Difference]: Finished difference Result 9112 states and 43616 transitions. [2022-11-18 21:07:28,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:28,947 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 [2022-11-18 21:07:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:28,982 INFO L225 Difference]: With dead ends: 9112 [2022-11-18 21:07:28,982 INFO L226 Difference]: Without dead ends: 9112 [2022-11-18 21:07:28,982 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 [2022-11-18 21:07:28,983 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:28,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-11-18 21:07:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9112 states. [2022-11-18 21:07:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9112 to 8761. [2022-11-18 21:07:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8761 states, 8756 states have (on average 4.762905436272271) internal successors, (41704), 8760 states have internal predecessors, (41704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:29,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8761 states to 8761 states and 41704 transitions. [2022-11-18 21:07:29,316 INFO L78 Accepts]: Start accepts. Automaton has 8761 states and 41704 transitions. Word has length 14 [2022-11-18 21:07:29,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:29,316 INFO L495 AbstractCegarLoop]: Abstraction has 8761 states and 41704 transitions. [2022-11-18 21:07:29,316 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) [2022-11-18 21:07:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 8761 states and 41704 transitions. [2022-11-18 21:07:29,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:29,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:29,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:29,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:29,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:29,520 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:29,521 INFO L85 PathProgramCache]: Analyzing trace with hash 380875799, now seen corresponding path program 7 times [2022-11-18 21:07:29,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:29,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830484344] [2022-11-18 21:07:29,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:07:29,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:29,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:29,523 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:29,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-18 21:07:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:29,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:30,057 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:30,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:30,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:31,147 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:31,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830484344] [2022-11-18 21:07:31,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [830484344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:31,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:31,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:31,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825323720] [2022-11-18 21:07:31,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:31,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:31,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:31,148 INFO L87 Difference]: Start difference. First operand 8761 states and 41704 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) [2022-11-18 21:07:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:31,877 INFO L93 Difference]: Finished difference Result 8980 states and 42745 transitions. [2022-11-18 21:07:31,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:31,879 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 [2022-11-18 21:07:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:31,913 INFO L225 Difference]: With dead ends: 8980 [2022-11-18 21:07:31,913 INFO L226 Difference]: Without dead ends: 8980 [2022-11-18 21:07:31,913 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 [2022-11-18 21:07:31,914 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:31,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2022-11-18 21:07:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8980 states. [2022-11-18 21:07:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8980 to 8759. [2022-11-18 21:07:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8759 states, 8754 states have (on average 4.763079734978295) internal successors, (41696), 8758 states have internal predecessors, (41696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:32,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8759 states to 8759 states and 41696 transitions. [2022-11-18 21:07:32,125 INFO L78 Accepts]: Start accepts. Automaton has 8759 states and 41696 transitions. Word has length 14 [2022-11-18 21:07:32,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:32,126 INFO L495 AbstractCegarLoop]: Abstraction has 8759 states and 41696 transitions. [2022-11-18 21:07:32,126 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) [2022-11-18 21:07:32,126 INFO L276 IsEmpty]: Start isEmpty. Operand 8759 states and 41696 transitions. [2022-11-18 21:07:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:32,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:32,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:32,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:32,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:32,330 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash 380884169, now seen corresponding path program 8 times [2022-11-18 21:07:32,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:32,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786682917] [2022-11-18 21:07:32,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:07:32,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:32,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:32,335 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:32,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-18 21:07:32,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:32,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:32,930 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:32,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:33,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:34,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:34,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786682917] [2022-11-18 21:07:34,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786682917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:34,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:34,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:34,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332926793] [2022-11-18 21:07:34,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:34,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:34,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:34,034 INFO L87 Difference]: Start difference. First operand 8759 states and 41696 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) [2022-11-18 21:07:34,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:34,802 INFO L93 Difference]: Finished difference Result 9240 states and 43949 transitions. [2022-11-18 21:07:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:34,804 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 [2022-11-18 21:07:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:34,838 INFO L225 Difference]: With dead ends: 9240 [2022-11-18 21:07:34,838 INFO L226 Difference]: Without dead ends: 9240 [2022-11-18 21:07:34,838 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 [2022-11-18 21:07:34,838 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:34,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 22 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 77 Unchecked, 0.6s Time] [2022-11-18 21:07:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9240 states. [2022-11-18 21:07:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9240 to 8769. [2022-11-18 21:07:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8769 states, 8764 states have (on average 4.7624372432679145) internal successors, (41738), 8768 states have internal predecessors, (41738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:35,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 41738 transitions. [2022-11-18 21:07:35,052 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 41738 transitions. Word has length 14 [2022-11-18 21:07:35,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:35,053 INFO L495 AbstractCegarLoop]: Abstraction has 8769 states and 41738 transitions. [2022-11-18 21:07:35,053 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) [2022-11-18 21:07:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 41738 transitions. [2022-11-18 21:07:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:35,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:35,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:35,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-18 21:07:35,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:35,257 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:35,257 INFO L85 PathProgramCache]: Analyzing trace with hash 376675268, now seen corresponding path program 6 times [2022-11-18 21:07:35,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:35,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858066792] [2022-11-18 21:07:35,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:07:35,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:35,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:35,258 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:35,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-18 21:07:35,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:07:35,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:35,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:35,819 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:35,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:36,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:36,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:36,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858066792] [2022-11-18 21:07:36,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858066792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:36,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:36,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050420226] [2022-11-18 21:07:36,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:36,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:36,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:36,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:36,976 INFO L87 Difference]: Start difference. First operand 8769 states and 41738 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) [2022-11-18 21:07:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:37,634 INFO L93 Difference]: Finished difference Result 9118 states and 43566 transitions. [2022-11-18 21:07:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:37,636 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 [2022-11-18 21:07:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:37,670 INFO L225 Difference]: With dead ends: 9118 [2022-11-18 21:07:37,670 INFO L226 Difference]: Without dead ends: 9118 [2022-11-18 21:07:37,670 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 [2022-11-18 21:07:37,670 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:37,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 27 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-11-18 21:07:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9118 states. [2022-11-18 21:07:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9118 to 8894. [2022-11-18 21:07:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8894 states, 8889 states have (on average 4.777027787152661) internal successors, (42463), 8893 states have internal predecessors, (42463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 42463 transitions. [2022-11-18 21:07:37,883 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 42463 transitions. Word has length 14 [2022-11-18 21:07:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:37,883 INFO L495 AbstractCegarLoop]: Abstraction has 8894 states and 42463 transitions. [2022-11-18 21:07:37,883 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) [2022-11-18 21:07:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 42463 transitions. [2022-11-18 21:07:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:37,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:37,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:37,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-18 21:07:38,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:38,087 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 376683638, now seen corresponding path program 7 times [2022-11-18 21:07:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:38,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703179503] [2022-11-18 21:07:38,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:07:38,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:38,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:38,089 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:38,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-18 21:07:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:38,613 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:38,614 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 [2022-11-18 21:07:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:39,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:39,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:39,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703179503] [2022-11-18 21:07:39,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703179503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:39,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:39,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:39,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951974380] [2022-11-18 21:07:39,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:39,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:39,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:39,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:39,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:39,697 INFO L87 Difference]: Start difference. First operand 8894 states and 42463 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) [2022-11-18 21:07:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:40,341 INFO L93 Difference]: Finished difference Result 9311 states and 44622 transitions. [2022-11-18 21:07:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:07:40,343 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 [2022-11-18 21:07:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:40,377 INFO L225 Difference]: With dead ends: 9311 [2022-11-18 21:07:40,377 INFO L226 Difference]: Without dead ends: 9311 [2022-11-18 21:07:40,377 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 [2022-11-18 21:07:40,377 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:40,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 105 Unchecked, 0.5s Time] [2022-11-18 21:07:40,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2022-11-18 21:07:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8905. [2022-11-18 21:07:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8905 states, 8900 states have (on average 4.77629213483146) internal successors, (42509), 8904 states have internal predecessors, (42509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8905 states to 8905 states and 42509 transitions. [2022-11-18 21:07:40,591 INFO L78 Accepts]: Start accepts. Automaton has 8905 states and 42509 transitions. Word has length 14 [2022-11-18 21:07:40,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:40,591 INFO L495 AbstractCegarLoop]: Abstraction has 8905 states and 42509 transitions. [2022-11-18 21:07:40,591 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) [2022-11-18 21:07:40,591 INFO L276 IsEmpty]: Start isEmpty. Operand 8905 states and 42509 transitions. [2022-11-18 21:07:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:40,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:40,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:40,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Ended with exit code 0 [2022-11-18 21:07:40,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:40,795 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash 381649559, now seen corresponding path program 9 times [2022-11-18 21:07:40,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:40,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841333633] [2022-11-18 21:07:40,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:07:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:40,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:40,797 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:40,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Waiting until timeout for monitored process [2022-11-18 21:07:41,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:07:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:41,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:41,349 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:41,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:41,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:42,533 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841333633] [2022-11-18 21:07:42,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841333633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:42,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:42,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:42,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240056379] [2022-11-18 21:07:42,534 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:42,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:42,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:42,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:42,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:42,534 INFO L87 Difference]: Start difference. First operand 8905 states and 42509 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) [2022-11-18 21:07:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:43,036 INFO L93 Difference]: Finished difference Result 9315 states and 44581 transitions. [2022-11-18 21:07:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:43,038 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 [2022-11-18 21:07:43,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:43,073 INFO L225 Difference]: With dead ends: 9315 [2022-11-18 21:07:43,074 INFO L226 Difference]: Without dead ends: 9315 [2022-11-18 21:07:43,074 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 [2022-11-18 21:07:43,074 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:43,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 40 Unchecked, 0.4s Time] [2022-11-18 21:07:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9315 states. [2022-11-18 21:07:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9315 to 8952. [2022-11-18 21:07:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8952 states, 8947 states have (on average 4.781491002570694) internal successors, (42780), 8951 states have internal predecessors, (42780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8952 states to 8952 states and 42780 transitions. [2022-11-18 21:07:43,295 INFO L78 Accepts]: Start accepts. Automaton has 8952 states and 42780 transitions. Word has length 14 [2022-11-18 21:07:43,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:43,295 INFO L495 AbstractCegarLoop]: Abstraction has 8952 states and 42780 transitions. [2022-11-18 21:07:43,295 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) [2022-11-18 21:07:43,295 INFO L276 IsEmpty]: Start isEmpty. Operand 8952 states and 42780 transitions. [2022-11-18 21:07:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:43,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:43,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:43,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (139)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:43,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:43,515 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash 381645188, now seen corresponding path program 8 times [2022-11-18 21:07:43,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:43,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203240722] [2022-11-18 21:07:43,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:07:43,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:43,517 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:43,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-18 21:07:43,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:43,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:43,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:44,106 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:44,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:44,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:45,243 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:45,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203240722] [2022-11-18 21:07:45,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203240722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:45,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:45,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:45,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998755595] [2022-11-18 21:07:45,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:45,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:45,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:45,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:45,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:45,245 INFO L87 Difference]: Start difference. First operand 8952 states and 42780 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) [2022-11-18 21:07:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:46,055 INFO L93 Difference]: Finished difference Result 9601 states and 46157 transitions. [2022-11-18 21:07:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:46,057 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 [2022-11-18 21:07:46,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:46,092 INFO L225 Difference]: With dead ends: 9601 [2022-11-18 21:07:46,092 INFO L226 Difference]: Without dead ends: 9601 [2022-11-18 21:07:46,092 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 [2022-11-18 21:07:46,092 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:46,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 139 Unchecked, 0.7s Time] [2022-11-18 21:07:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9601 states. [2022-11-18 21:07:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9601 to 9111. [2022-11-18 21:07:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9106 states have (on average 4.798704151109159) internal successors, (43697), 9110 states have internal predecessors, (43697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 43697 transitions. [2022-11-18 21:07:46,313 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 43697 transitions. Word has length 14 [2022-11-18 21:07:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:46,313 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 43697 transitions. [2022-11-18 21:07:46,313 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) [2022-11-18 21:07:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 43697 transitions. [2022-11-18 21:07:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:46,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:46,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:46,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Ended with exit code 0 [2022-11-18 21:07:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:46,517 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1781867061, now seen corresponding path program 1 times [2022-11-18 21:07:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:46,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [676753175] [2022-11-18 21:07:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:46,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:46,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:46,519 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:46,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-18 21:07:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:46,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:47,067 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:47,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:47,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:48,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:48,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [676753175] [2022-11-18 21:07:48,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [676753175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:48,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:48,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:48,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561469502] [2022-11-18 21:07:48,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:48,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:48,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:48,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:48,124 INFO L87 Difference]: Start difference. First operand 9111 states and 43697 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) [2022-11-18 21:07:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:48,681 INFO L93 Difference]: Finished difference Result 9293 states and 44469 transitions. [2022-11-18 21:07:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:48,683 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 [2022-11-18 21:07:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:48,717 INFO L225 Difference]: With dead ends: 9293 [2022-11-18 21:07:48,717 INFO L226 Difference]: Without dead ends: 9293 [2022-11-18 21:07:48,717 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 [2022-11-18 21:07:48,717 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:48,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 49 Unchecked, 0.4s Time] [2022-11-18 21:07:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9293 states. [2022-11-18 21:07:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9293 to 9111. [2022-11-18 21:07:48,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9106 states have (on average 4.798704151109159) internal successors, (43697), 9110 states have internal predecessors, (43697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 43697 transitions. [2022-11-18 21:07:48,938 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 43697 transitions. Word has length 14 [2022-11-18 21:07:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:48,939 INFO L495 AbstractCegarLoop]: Abstraction has 9111 states and 43697 transitions. [2022-11-18 21:07:48,939 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) [2022-11-18 21:07:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 43697 transitions. [2022-11-18 21:07:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:48,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:48,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:48,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-18 21:07:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:49,143 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1781873571, now seen corresponding path program 2 times [2022-11-18 21:07:49,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113413239] [2022-11-18 21:07:49,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:07:49,144 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 [2022-11-18 21:07:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:49,145 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:49,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Waiting until timeout for monitored process [2022-11-18 21:07:49,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:49,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:49,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:49,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:49,731 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:49,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:50,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:50,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:50,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:50,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113413239] [2022-11-18 21:07:50,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113413239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:50,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:50,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518539899] [2022-11-18 21:07:50,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:50,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:50,902 INFO L87 Difference]: Start difference. First operand 9111 states and 43697 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) [2022-11-18 21:07:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:51,454 INFO L93 Difference]: Finished difference Result 9427 states and 45031 transitions. [2022-11-18 21:07:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:51,456 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 [2022-11-18 21:07:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:51,489 INFO L225 Difference]: With dead ends: 9427 [2022-11-18 21:07:51,489 INFO L226 Difference]: Without dead ends: 9427 [2022-11-18 21:07:51,490 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 [2022-11-18 21:07:51,490 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:51,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 22 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 51 Unchecked, 0.4s Time] [2022-11-18 21:07:51,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9427 states. [2022-11-18 21:07:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9427 to 9187. [2022-11-18 21:07:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9187 states, 9182 states have (on average 4.799063384883468) internal successors, (44065), 9186 states have internal predecessors, (44065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9187 states to 9187 states and 44065 transitions. [2022-11-18 21:07:51,707 INFO L78 Accepts]: Start accepts. Automaton has 9187 states and 44065 transitions. Word has length 14 [2022-11-18 21:07:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:51,707 INFO L495 AbstractCegarLoop]: Abstraction has 9187 states and 44065 transitions. [2022-11-18 21:07:51,707 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) [2022-11-18 21:07:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 9187 states and 44065 transitions. [2022-11-18 21:07:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:51,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:51,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:51,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (142)] Ended with exit code 0 [2022-11-18 21:07:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:51,912 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:51,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1787034141, now seen corresponding path program 3 times [2022-11-18 21:07:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796403862] [2022-11-18 21:07:51,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:07:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:51,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:51,913 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:51,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-18 21:07:52,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:07:52,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:52,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:52,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:52,494 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:52,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:52,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:53,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:53,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796403862] [2022-11-18 21:07:53,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796403862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:53,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:53,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:53,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58070016] [2022-11-18 21:07:53,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:53,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:53,574 INFO L87 Difference]: Start difference. First operand 9187 states and 44065 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) [2022-11-18 21:07:53,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:53,786 INFO L93 Difference]: Finished difference Result 9393 states and 45039 transitions. [2022-11-18 21:07:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:07:53,787 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 [2022-11-18 21:07:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:53,820 INFO L225 Difference]: With dead ends: 9393 [2022-11-18 21:07:53,820 INFO L226 Difference]: Without dead ends: 9393 [2022-11-18 21:07:53,820 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 [2022-11-18 21:07:53,820 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:53,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-18 21:07:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2022-11-18 21:07:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 9211. [2022-11-18 21:07:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9211 states, 9206 states have (on average 4.7991527264827285) internal successors, (44181), 9210 states have internal predecessors, (44181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9211 states to 9211 states and 44181 transitions. [2022-11-18 21:07:54,127 INFO L78 Accepts]: Start accepts. Automaton has 9211 states and 44181 transitions. Word has length 14 [2022-11-18 21:07:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:54,127 INFO L495 AbstractCegarLoop]: Abstraction has 9211 states and 44181 transitions. [2022-11-18 21:07:54,127 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) [2022-11-18 21:07:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 9211 states and 44181 transitions. [2022-11-18 21:07:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:54,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:54,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:54,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Ended with exit code 0 [2022-11-18 21:07:54,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:54,331 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1769354841, now seen corresponding path program 4 times [2022-11-18 21:07:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:54,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550960575] [2022-11-18 21:07:54,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:07:54,333 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 [2022-11-18 21:07:54,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:54,334 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:54,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-18 21:07:54,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:07:54,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:07:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:54,870 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:54,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:55,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:55,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:55,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550960575] [2022-11-18 21:07:55,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550960575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:55,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:55,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:07:55,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984644664] [2022-11-18 21:07:55,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:07:55,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:07:55,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:55,929 INFO L87 Difference]: Start difference. First operand 9211 states and 44181 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) [2022-11-18 21:07:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:56,456 INFO L93 Difference]: Finished difference Result 9361 states and 44805 transitions. [2022-11-18 21:07:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:56,457 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 [2022-11-18 21:07:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:56,491 INFO L225 Difference]: With dead ends: 9361 [2022-11-18 21:07:56,491 INFO L226 Difference]: Without dead ends: 9361 [2022-11-18 21:07:56,491 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 [2022-11-18 21:07:56,491 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:56,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 74 Unchecked, 0.4s Time] [2022-11-18 21:07:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2022-11-18 21:07:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 9209. [2022-11-18 21:07:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9209 states, 9204 states have (on average 4.799326379834854) internal successors, (44173), 9208 states have internal predecessors, (44173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9209 states to 9209 states and 44173 transitions. [2022-11-18 21:07:56,716 INFO L78 Accepts]: Start accepts. Automaton has 9209 states and 44173 transitions. Word has length 14 [2022-11-18 21:07:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:56,716 INFO L495 AbstractCegarLoop]: Abstraction has 9209 states and 44173 transitions. [2022-11-18 21:07:56,716 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) [2022-11-18 21:07:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9209 states and 44173 transitions. [2022-11-18 21:07:56,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:56,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:56,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:56,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-18 21:07:56,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:56,920 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:56,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1769361351, now seen corresponding path program 5 times [2022-11-18 21:07:56,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:56,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473510759] [2022-11-18 21:07:56,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:07:56,921 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:56,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:56,923 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:56,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Waiting until timeout for monitored process [2022-11-18 21:07:57,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:07:57,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:07:57,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:07:57,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:57,474 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:07:57,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:07:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:57,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:58,824 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:07:58,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473510759] [2022-11-18 21:07:58,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473510759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:58,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:07:58,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:07:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861275842] [2022-11-18 21:07:58,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:58,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:58,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:07:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:58,825 INFO L87 Difference]: Start difference. First operand 9209 states and 44173 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) [2022-11-18 21:07:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:59,483 INFO L93 Difference]: Finished difference Result 9381 states and 44855 transitions. [2022-11-18 21:07:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:07:59,485 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 [2022-11-18 21:07:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:59,519 INFO L225 Difference]: With dead ends: 9381 [2022-11-18 21:07:59,519 INFO L226 Difference]: Without dead ends: 9381 [2022-11-18 21:07:59,520 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 [2022-11-18 21:07:59,520 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:59,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 19 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-18 21:07:59,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9381 states. [2022-11-18 21:07:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9381 to 9211. [2022-11-18 21:07:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9211 states, 9206 states have (on average 4.7991527264827285) internal successors, (44181), 9210 states have internal predecessors, (44181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9211 states to 9211 states and 44181 transitions. [2022-11-18 21:07:59,741 INFO L78 Accepts]: Start accepts. Automaton has 9211 states and 44181 transitions. Word has length 14 [2022-11-18 21:07:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:59,741 INFO L495 AbstractCegarLoop]: Abstraction has 9211 states and 44181 transitions. [2022-11-18 21:07:59,741 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) [2022-11-18 21:07:59,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9211 states and 44181 transitions. [2022-11-18 21:07:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:07:59,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:59,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:07:59,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (145)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:59,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:59,945 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:07:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2031812377, now seen corresponding path program 6 times [2022-11-18 21:07:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:07:59,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527091322] [2022-11-18 21:07:59,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:07:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:07:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:07:59,947 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:07:59,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-18 21:08:00,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:08:00,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:00,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:00,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:00,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:00,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:01,602 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:01,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527091322] [2022-11-18 21:08:01,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527091322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:01,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:01,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:01,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089086872] [2022-11-18 21:08:01,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:01,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:01,604 INFO L87 Difference]: Start difference. First operand 9211 states and 44181 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) [2022-11-18 21:08:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:02,166 INFO L93 Difference]: Finished difference Result 9445 states and 45179 transitions. [2022-11-18 21:08:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:02,168 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 [2022-11-18 21:08:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:02,201 INFO L225 Difference]: With dead ends: 9445 [2022-11-18 21:08:02,201 INFO L226 Difference]: Without dead ends: 9445 [2022-11-18 21:08:02,201 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 [2022-11-18 21:08:02,202 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:02,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-11-18 21:08:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9445 states. [2022-11-18 21:08:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9445 to 9237. [2022-11-18 21:08:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9237 states, 9232 states have (on average 4.799068457538994) internal successors, (44305), 9236 states have internal predecessors, (44305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 44305 transitions. [2022-11-18 21:08:02,424 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 44305 transitions. Word has length 14 [2022-11-18 21:08:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:02,424 INFO L495 AbstractCegarLoop]: Abstraction has 9237 states and 44305 transitions. [2022-11-18 21:08:02,424 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) [2022-11-18 21:08:02,424 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 44305 transitions. [2022-11-18 21:08:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:02,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:02,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:02,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Ended with exit code 0 [2022-11-18 21:08:02,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:02,628 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:02,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2031818887, now seen corresponding path program 7 times [2022-11-18 21:08:02,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:02,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216237057] [2022-11-18 21:08:02,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:08:02,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:02,630 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:02,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-18 21:08:02,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:02,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:03,148 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:03,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:03,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:04,224 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:04,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216237057] [2022-11-18 21:08:04,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216237057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:04,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:04,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:04,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347642268] [2022-11-18 21:08:04,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:04,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:04,226 INFO L87 Difference]: Start difference. First operand 9237 states and 44305 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) [2022-11-18 21:08:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:04,770 INFO L93 Difference]: Finished difference Result 9329 states and 44723 transitions. [2022-11-18 21:08:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:08:04,771 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 [2022-11-18 21:08:04,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:04,806 INFO L225 Difference]: With dead ends: 9329 [2022-11-18 21:08:04,806 INFO L226 Difference]: Without dead ends: 9329 [2022-11-18 21:08:04,806 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 [2022-11-18 21:08:04,806 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:04,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-18 21:08:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2022-11-18 21:08:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 9239. [2022-11-18 21:08:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9239 states, 9234 states have (on average 4.798895386614685) internal successors, (44313), 9238 states have internal predecessors, (44313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9239 states to 9239 states and 44313 transitions. [2022-11-18 21:08:05,130 INFO L78 Accepts]: Start accepts. Automaton has 9239 states and 44313 transitions. Word has length 14 [2022-11-18 21:08:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:05,131 INFO L495 AbstractCegarLoop]: Abstraction has 9239 states and 44313 transitions. [2022-11-18 21:08:05,131 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) [2022-11-18 21:08:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 9239 states and 44313 transitions. [2022-11-18 21:08:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:05,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:05,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:05,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Ended with exit code 0 [2022-11-18 21:08:05,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:05,335 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:05,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:05,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2032526617, now seen corresponding path program 8 times [2022-11-18 21:08:05,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:05,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922131334] [2022-11-18 21:08:05,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:08:05,337 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 [2022-11-18 21:08:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:05,338 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:05,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Waiting until timeout for monitored process [2022-11-18 21:08:05,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:08:05,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:05,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:06,019 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:06,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:06,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:07,155 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922131334] [2022-11-18 21:08:07,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922131334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:07,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:07,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535643298] [2022-11-18 21:08:07,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:07,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:07,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:07,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:07,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:07,157 INFO L87 Difference]: Start difference. First operand 9239 states and 44313 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) [2022-11-18 21:08:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:07,704 INFO L93 Difference]: Finished difference Result 9379 states and 44965 transitions. [2022-11-18 21:08:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:07,706 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 [2022-11-18 21:08:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:07,740 INFO L225 Difference]: With dead ends: 9379 [2022-11-18 21:08:07,741 INFO L226 Difference]: Without dead ends: 9379 [2022-11-18 21:08:07,741 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 [2022-11-18 21:08:07,741 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:07,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 21:08:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2022-11-18 21:08:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 9281. [2022-11-18 21:08:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9276 states have (on average 4.800668391548081) internal successors, (44531), 9280 states have internal predecessors, (44531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 44531 transitions. [2022-11-18 21:08:07,963 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 44531 transitions. Word has length 14 [2022-11-18 21:08:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:07,963 INFO L495 AbstractCegarLoop]: Abstraction has 9281 states and 44531 transitions. [2022-11-18 21:08:07,964 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) [2022-11-18 21:08:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 44531 transitions. [2022-11-18 21:08:07,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:07,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:07,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:07,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (148)] Ended with exit code 0 [2022-11-18 21:08:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:08,169 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:08,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2102478819, now seen corresponding path program 9 times [2022-11-18 21:08:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:08,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26178007] [2022-11-18 21:08:08,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:08:08,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:08,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:08,170 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:08,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Waiting until timeout for monitored process [2022-11-18 21:08:08,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:08:08,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:08,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:08,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:08,779 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:08,779 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 [2022-11-18 21:08:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:09,872 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:09,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26178007] [2022-11-18 21:08:09,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26178007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:09,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:09,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247243822] [2022-11-18 21:08:09,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:09,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:09,873 INFO L87 Difference]: Start difference. First operand 9281 states and 44531 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) [2022-11-18 21:08:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:10,089 INFO L93 Difference]: Finished difference Result 9461 states and 45379 transitions. [2022-11-18 21:08:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:10,090 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 [2022-11-18 21:08:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:10,126 INFO L225 Difference]: With dead ends: 9461 [2022-11-18 21:08:10,126 INFO L226 Difference]: Without dead ends: 9461 [2022-11-18 21:08:10,126 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 [2022-11-18 21:08:10,127 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:10,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 22 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-11-18 21:08:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9461 states. [2022-11-18 21:08:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9461 to 9281. [2022-11-18 21:08:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9276 states have (on average 4.800668391548081) internal successors, (44531), 9280 states have internal predecessors, (44531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 44531 transitions. [2022-11-18 21:08:10,352 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 44531 transitions. Word has length 14 [2022-11-18 21:08:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:10,352 INFO L495 AbstractCegarLoop]: Abstraction has 9281 states and 44531 transitions. [2022-11-18 21:08:10,352 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) [2022-11-18 21:08:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 44531 transitions. [2022-11-18 21:08:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:10,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:10,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:10,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (149)] Ended with exit code 0 [2022-11-18 21:08:10,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:10,556 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:10,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:10,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2102463009, now seen corresponding path program 10 times [2022-11-18 21:08:10,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:10,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924587440] [2022-11-18 21:08:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:08:10,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:10,558 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:10,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-18 21:08:10,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:08:10,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:10,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:11,123 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:11,123 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 [2022-11-18 21:08:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:11,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:12,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:12,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924587440] [2022-11-18 21:08:12,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924587440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:12,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:12,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:12,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802910755] [2022-11-18 21:08:12,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:12,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:12,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:12,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:12,191 INFO L87 Difference]: Start difference. First operand 9281 states and 44531 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) [2022-11-18 21:08:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:12,682 INFO L93 Difference]: Finished difference Result 9371 states and 44975 transitions. [2022-11-18 21:08:12,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:12,684 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 [2022-11-18 21:08:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:12,719 INFO L225 Difference]: With dead ends: 9371 [2022-11-18 21:08:12,719 INFO L226 Difference]: Without dead ends: 9371 [2022-11-18 21:08:12,720 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 [2022-11-18 21:08:12,720 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:12,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 21:08:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9371 states. [2022-11-18 21:08:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9371 to 9281. [2022-11-18 21:08:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9281 states, 9276 states have (on average 4.800668391548081) internal successors, (44531), 9280 states have internal predecessors, (44531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9281 states to 9281 states and 44531 transitions. [2022-11-18 21:08:12,946 INFO L78 Accepts]: Start accepts. Automaton has 9281 states and 44531 transitions. Word has length 14 [2022-11-18 21:08:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:12,947 INFO L495 AbstractCegarLoop]: Abstraction has 9281 states and 44531 transitions. [2022-11-18 21:08:12,947 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) [2022-11-18 21:08:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 9281 states and 44531 transitions. [2022-11-18 21:08:12,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:12,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:12,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:12,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Ended with exit code 0 [2022-11-18 21:08:13,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:13,151 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash -2102462823, now seen corresponding path program 1 times [2022-11-18 21:08:13,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039263068] [2022-11-18 21:08:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:08:13,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:13,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:13,153 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:13,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Waiting until timeout for monitored process [2022-11-18 21:08:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:13,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:13,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:13,734 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:13,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:14,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:14,803 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:14,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039263068] [2022-11-18 21:08:14,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039263068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:14,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:14,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:14,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130153211] [2022-11-18 21:08:14,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:14,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:14,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:14,805 INFO L87 Difference]: Start difference. First operand 9281 states and 44531 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) [2022-11-18 21:08:15,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:15,321 INFO L93 Difference]: Finished difference Result 9347 states and 44847 transitions. [2022-11-18 21:08:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:15,323 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 [2022-11-18 21:08:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:15,359 INFO L225 Difference]: With dead ends: 9347 [2022-11-18 21:08:15,359 INFO L226 Difference]: Without dead ends: 9347 [2022-11-18 21:08:15,359 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 [2022-11-18 21:08:15,359 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:15,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-11-18 21:08:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9347 states. [2022-11-18 21:08:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9347 to 9279. [2022-11-18 21:08:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9274 states have (on average 4.800625404356265) internal successors, (44521), 9278 states have internal predecessors, (44521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 44521 transitions. [2022-11-18 21:08:15,582 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 44521 transitions. Word has length 14 [2022-11-18 21:08:15,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:15,582 INFO L495 AbstractCegarLoop]: Abstraction has 9279 states and 44521 transitions. [2022-11-18 21:08:15,582 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) [2022-11-18 21:08:15,582 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 44521 transitions. [2022-11-18 21:08:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:15,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:15,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:15,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (151)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:15,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:15,786 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2102473053, now seen corresponding path program 2 times [2022-11-18 21:08:15,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:15,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462503248] [2022-11-18 21:08:15,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:08:15,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:15,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:15,789 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:15,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Waiting until timeout for monitored process [2022-11-18 21:08:16,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:08:16,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:16,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:16,500 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:16,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:16,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:17,595 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462503248] [2022-11-18 21:08:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462503248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:17,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:17,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:17,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312629385] [2022-11-18 21:08:17,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:17,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:17,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:17,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:17,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:17,596 INFO L87 Difference]: Start difference. First operand 9279 states and 44521 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) [2022-11-18 21:08:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:18,124 INFO L93 Difference]: Finished difference Result 9379 states and 44993 transitions. [2022-11-18 21:08:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:18,126 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 [2022-11-18 21:08:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:18,161 INFO L225 Difference]: With dead ends: 9379 [2022-11-18 21:08:18,161 INFO L226 Difference]: Without dead ends: 9379 [2022-11-18 21:08:18,161 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 [2022-11-18 21:08:18,162 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:18,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-18 21:08:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9379 states. [2022-11-18 21:08:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9379 to 9277. [2022-11-18 21:08:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9277 states, 9272 states have (on average 4.8005823986194995) internal successors, (44511), 9276 states have internal predecessors, (44511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9277 states to 9277 states and 44511 transitions. [2022-11-18 21:08:18,391 INFO L78 Accepts]: Start accepts. Automaton has 9277 states and 44511 transitions. Word has length 14 [2022-11-18 21:08:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:18,391 INFO L495 AbstractCegarLoop]: Abstraction has 9277 states and 44511 transitions. [2022-11-18 21:08:18,391 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) [2022-11-18 21:08:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 9277 states and 44511 transitions. [2022-11-18 21:08:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:18,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:18,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:18,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (152)] Ended with exit code 0 [2022-11-18 21:08:18,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:18,596 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2097831423, now seen corresponding path program 3 times [2022-11-18 21:08:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:18,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063560346] [2022-11-18 21:08:18,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:08:18,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:18,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:18,598 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:18,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-18 21:08:19,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:08:19,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:19,220 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:19,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:08:19,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:08:20,364 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063560346] [2022-11-18 21:08:20,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063560346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:20,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:20,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968362044] [2022-11-18 21:08:20,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:20,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:20,365 INFO L87 Difference]: Start difference. First operand 9277 states and 44511 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) [2022-11-18 21:08:20,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:20,894 INFO L93 Difference]: Finished difference Result 9393 states and 45047 transitions. [2022-11-18 21:08:20,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:08:20,896 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 [2022-11-18 21:08:20,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:20,931 INFO L225 Difference]: With dead ends: 9393 [2022-11-18 21:08:20,931 INFO L226 Difference]: Without dead ends: 9393 [2022-11-18 21:08:20,931 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 [2022-11-18 21:08:20,932 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:20,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 35 Unchecked, 0.4s Time] [2022-11-18 21:08:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9393 states. [2022-11-18 21:08:21,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9393 to 9273. [2022-11-18 21:08:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9273 states, 9268 states have (on average 4.800712127751403) internal successors, (44493), 9272 states have internal predecessors, (44493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9273 states to 9273 states and 44493 transitions. [2022-11-18 21:08:21,157 INFO L78 Accepts]: Start accepts. Automaton has 9273 states and 44493 transitions. Word has length 14 [2022-11-18 21:08:21,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:21,157 INFO L495 AbstractCegarLoop]: Abstraction has 9273 states and 44493 transitions. [2022-11-18 21:08:21,157 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) [2022-11-18 21:08:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9273 states and 44493 transitions. [2022-11-18 21:08:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:21,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:21,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:21,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Ended with exit code 0 [2022-11-18 21:08:21,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:21,362 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:21,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1769955997, now seen corresponding path program 11 times [2022-11-18 21:08:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:21,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772859399] [2022-11-18 21:08:21,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:08:21,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:21,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:21,364 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:21,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Waiting until timeout for monitored process [2022-11-18 21:08:21,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:08:21,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:21,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:08:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:21,917 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:21,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:22,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:22,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:23,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:23,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772859399] [2022-11-18 21:08:23,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772859399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:23,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:23,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:08:23,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477330174] [2022-11-18 21:08:23,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:23,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:08:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:08:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:08:23,263 INFO L87 Difference]: Start difference. First operand 9273 states and 44493 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) [2022-11-18 21:08:23,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:23,844 INFO L93 Difference]: Finished difference Result 9329 states and 44759 transitions. [2022-11-18 21:08:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:23,846 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 [2022-11-18 21:08:23,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:23,881 INFO L225 Difference]: With dead ends: 9329 [2022-11-18 21:08:23,881 INFO L226 Difference]: Without dead ends: 9329 [2022-11-18 21:08:23,881 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 [2022-11-18 21:08:23,881 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:23,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2022-11-18 21:08:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2022-11-18 21:08:24,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 9269. [2022-11-18 21:08:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9269 states, 9264 states have (on average 4.801057858376511) internal successors, (44477), 9268 states have internal predecessors, (44477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9269 states to 9269 states and 44477 transitions. [2022-11-18 21:08:24,111 INFO L78 Accepts]: Start accepts. Automaton has 9269 states and 44477 transitions. Word has length 14 [2022-11-18 21:08:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:24,112 INFO L495 AbstractCegarLoop]: Abstraction has 9269 states and 44477 transitions. [2022-11-18 21:08:24,112 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) [2022-11-18 21:08:24,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9269 states and 44477 transitions. [2022-11-18 21:08:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:24,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:24,115 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:24,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (154)] Forceful destruction successful, exit code 0 [2022-11-18 21:08:24,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:24,316 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1644423667, now seen corresponding path program 12 times [2022-11-18 21:08:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:24,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055299759] [2022-11-18 21:08:24,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:08:24,317 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:24,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:24,318 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:24,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Waiting until timeout for monitored process [2022-11-18 21:08:24,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:08:24,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:24,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:24,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:24,937 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:24,937 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 [2022-11-18 21:08:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:25,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:26,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:26,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055299759] [2022-11-18 21:08:26,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055299759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:26,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:26,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:26,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151862800] [2022-11-18 21:08:26,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:26,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:26,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:26,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:26,087 INFO L87 Difference]: Start difference. First operand 9269 states and 44477 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) [2022-11-18 21:08:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:26,672 INFO L93 Difference]: Finished difference Result 9473 states and 45365 transitions. [2022-11-18 21:08:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:26,673 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 [2022-11-18 21:08:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:26,709 INFO L225 Difference]: With dead ends: 9473 [2022-11-18 21:08:26,709 INFO L226 Difference]: Without dead ends: 9473 [2022-11-18 21:08:26,709 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 [2022-11-18 21:08:26,709 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:26,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-18 21:08:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9473 states. [2022-11-18 21:08:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9473 to 9279. [2022-11-18 21:08:26,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9279 states, 9274 states have (on average 4.802135001078283) internal successors, (44535), 9278 states have internal predecessors, (44535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9279 states to 9279 states and 44535 transitions. [2022-11-18 21:08:26,945 INFO L78 Accepts]: Start accepts. Automaton has 9279 states and 44535 transitions. Word has length 14 [2022-11-18 21:08:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:26,945 INFO L495 AbstractCegarLoop]: Abstraction has 9279 states and 44535 transitions. [2022-11-18 21:08:26,946 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) [2022-11-18 21:08:26,946 INFO L276 IsEmpty]: Start isEmpty. Operand 9279 states and 44535 transitions. [2022-11-18 21:08:26,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 21:08:26,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:26,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:26,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (155)] Ended with exit code 0 [2022-11-18 21:08:27,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:27,150 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:27,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:27,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1644647797, now seen corresponding path program 13 times [2022-11-18 21:08:27,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:27,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010997813] [2022-11-18 21:08:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:08:27,151 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:27,152 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:27,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-18 21:08:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:08:27,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:08:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:27,728 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:27,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:28,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:08:28,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:28,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010997813] [2022-11-18 21:08:28,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010997813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:28,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:28,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:08:28,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931705013] [2022-11-18 21:08:28,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:28,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:08:28,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:08:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:08:28,847 INFO L87 Difference]: Start difference. First operand 9279 states and 44535 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) [2022-11-18 21:08:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:29,418 INFO L93 Difference]: Finished difference Result 9353 states and 44869 transitions. [2022-11-18 21:08:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:08:29,419 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 [2022-11-18 21:08:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:29,455 INFO L225 Difference]: With dead ends: 9353 [2022-11-18 21:08:29,455 INFO L226 Difference]: Without dead ends: 9353 [2022-11-18 21:08:29,455 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 [2022-11-18 21:08:29,455 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:29,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 25 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-18 21:08:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9353 states. [2022-11-18 21:08:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9353 to 9275. [2022-11-18 21:08:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9275 states, 9270 states have (on average 4.802049622437972) internal successors, (44515), 9274 states have internal predecessors, (44515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 44515 transitions. [2022-11-18 21:08:29,680 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 44515 transitions. Word has length 14 [2022-11-18 21:08:29,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:29,680 INFO L495 AbstractCegarLoop]: Abstraction has 9275 states and 44515 transitions. [2022-11-18 21:08:29,681 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) [2022-11-18 21:08:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 44515 transitions. [2022-11-18 21:08:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:08:29,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:29,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:29,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Ended with exit code 0 [2022-11-18 21:08:29,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:29,886 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:29,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash -423680585, now seen corresponding path program 6 times [2022-11-18 21:08:29,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:29,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331624942] [2022-11-18 21:08:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:08:29,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:29,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:29,891 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:29,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Waiting until timeout for monitored process [2022-11-18 21:08:30,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 21:08:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 21:08:30,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:30,558 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:30,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:08:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:31,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:33,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331624942] [2022-11-18 21:08:33,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331624942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:33,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:33,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2022-11-18 21:08:33,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259934087] [2022-11-18 21:08:33,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:33,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 21:08:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 21:08:33,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:08:33,603 INFO L87 Difference]: Start difference. First operand 9275 states and 44515 transitions. Second operand has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:08:50,171 INFO L93 Difference]: Finished difference Result 14479 states and 66281 transitions. [2022-11-18 21:08:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 21:08:50,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 21:08:50,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:08:50,229 INFO L225 Difference]: With dead ends: 14479 [2022-11-18 21:08:50,229 INFO L226 Difference]: Without dead ends: 14479 [2022-11-18 21:08:50,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 21:08:50,230 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 568 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:08:50,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 176 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1561 Invalid, 0 Unknown, 254 Unchecked, 11.6s Time] [2022-11-18 21:08:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14479 states. [2022-11-18 21:08:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14479 to 9459. [2022-11-18 21:08:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9459 states, 9454 states have (on average 4.808863972921515) internal successors, (45463), 9458 states have internal predecessors, (45463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9459 states to 9459 states and 45463 transitions. [2022-11-18 21:08:50,545 INFO L78 Accepts]: Start accepts. Automaton has 9459 states and 45463 transitions. Word has length 15 [2022-11-18 21:08:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:08:50,546 INFO L495 AbstractCegarLoop]: Abstraction has 9459 states and 45463 transitions. [2022-11-18 21:08:50,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:08:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 9459 states and 45463 transitions. [2022-11-18 21:08:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:08:50,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:08:50,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:08:50,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (157)] Ended with exit code 0 [2022-11-18 21:08:50,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:50,751 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:08:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:08:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1478584406, now seen corresponding path program 12 times [2022-11-18 21:08:50,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:08:50,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022580710] [2022-11-18 21:08:50,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:08:50,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:08:50,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:08:50,753 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:08:50,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Waiting until timeout for monitored process [2022-11-18 21:08:51,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 21:08:51,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:08:51,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:08:51,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:08:51,400 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:08:51,400 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 [2022-11-18 21:08:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:52,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:08:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:08:53,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:08:53,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022580710] [2022-11-18 21:08:53,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022580710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:08:53,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:08:53,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:08:53,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883317894] [2022-11-18 21:08:53,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:08:53,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:08:53,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:08:53,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:08:53,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:08:53,537 INFO L87 Difference]: Start difference. First operand 9459 states and 45463 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) [2022-11-18 21:09:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:00,065 INFO L93 Difference]: Finished difference Result 13345 states and 63113 transitions. [2022-11-18 21:09:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 21:09:00,066 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 [2022-11-18 21:09:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:00,120 INFO L225 Difference]: With dead ends: 13345 [2022-11-18 21:09:00,121 INFO L226 Difference]: Without dead ends: 13345 [2022-11-18 21:09:00,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:09:00,121 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 304 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:00,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 83 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 445 Invalid, 0 Unknown, 489 Unchecked, 3.4s Time] [2022-11-18 21:09:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13345 states. [2022-11-18 21:09:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13345 to 10070. [2022-11-18 21:09:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10070 states, 10065 states have (on average 4.829110779930452) internal successors, (48605), 10069 states have internal predecessors, (48605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10070 states to 10070 states and 48605 transitions. [2022-11-18 21:09:00,404 INFO L78 Accepts]: Start accepts. Automaton has 10070 states and 48605 transitions. Word has length 15 [2022-11-18 21:09:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:00,404 INFO L495 AbstractCegarLoop]: Abstraction has 10070 states and 48605 transitions. [2022-11-18 21:09:00,405 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) [2022-11-18 21:09:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 10070 states and 48605 transitions. [2022-11-18 21:09:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:09:00,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:00,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:00,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (158)] Ended with exit code 0 [2022-11-18 21:09:00,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:00,610 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:09:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1478852246, now seen corresponding path program 13 times [2022-11-18 21:09:00,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:09:00,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156218786] [2022-11-18 21:09:00,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:09:00,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:00,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:09:00,612 INFO L229 MonitoredProcess]: Starting monitored process 159 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:09:00,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Waiting until timeout for monitored process [2022-11-18 21:09:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:09:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:09:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:01,258 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:09:01,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:09:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:01,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:03,459 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:09:03,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156218786] [2022-11-18 21:09:03,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156218786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:09:03,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:09:03,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:09:03,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107100265] [2022-11-18 21:09:03,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:03,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:09:03,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:09:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:09:03,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:09:03,461 INFO L87 Difference]: Start difference. First operand 10070 states and 48605 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) [2022-11-18 21:09:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:10,305 INFO L93 Difference]: Finished difference Result 13220 states and 62318 transitions. [2022-11-18 21:09:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 21:09:10,307 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 [2022-11-18 21:09:10,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:10,358 INFO L225 Difference]: With dead ends: 13220 [2022-11-18 21:09:10,358 INFO L226 Difference]: Without dead ends: 13220 [2022-11-18 21:09:10,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:09:10,359 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:10,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 86 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 450 Invalid, 0 Unknown, 353 Unchecked, 3.8s Time] [2022-11-18 21:09:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13220 states. [2022-11-18 21:09:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13220 to 10356. [2022-11-18 21:09:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10356 states, 10351 states have (on average 4.833735870930345) internal successors, (50034), 10355 states have internal predecessors, (50034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10356 states to 10356 states and 50034 transitions. [2022-11-18 21:09:10,650 INFO L78 Accepts]: Start accepts. Automaton has 10356 states and 50034 transitions. Word has length 15 [2022-11-18 21:09:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:10,650 INFO L495 AbstractCegarLoop]: Abstraction has 10356 states and 50034 transitions. [2022-11-18 21:09:10,651 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) [2022-11-18 21:09:10,651 INFO L276 IsEmpty]: Start isEmpty. Operand 10356 states and 50034 transitions. [2022-11-18 21:09:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:09:10,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:10,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:10,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (159)] Ended with exit code 0 [2022-11-18 21:09:10,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:10,857 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:09:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash 620304522, now seen corresponding path program 14 times [2022-11-18 21:09:10,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:09:10,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120721079] [2022-11-18 21:09:10,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:09:10,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:10,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:09:10,858 INFO L229 MonitoredProcess]: Starting monitored process 160 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:09:10,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Waiting until timeout for monitored process [2022-11-18 21:09:11,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:09:11,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:09:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:11,529 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:09:11,530 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 [2022-11-18 21:09:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:12,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:13,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:09:13,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120721079] [2022-11-18 21:09:13,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120721079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:09:13,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:09:13,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:09:13,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827537978] [2022-11-18 21:09:13,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:13,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:09:13,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:09:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:09:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:09:13,639 INFO L87 Difference]: Start difference. First operand 10356 states and 50034 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) [2022-11-18 21:09:17,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:17,282 INFO L93 Difference]: Finished difference Result 14576 states and 69701 transitions. [2022-11-18 21:09:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 21:09:17,285 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 [2022-11-18 21:09:17,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:17,346 INFO L225 Difference]: With dead ends: 14576 [2022-11-18 21:09:17,346 INFO L226 Difference]: Without dead ends: 14576 [2022-11-18 21:09:17,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:09:17,346 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 165 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:17,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 74 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 329 Invalid, 0 Unknown, 246 Unchecked, 2.2s Time] [2022-11-18 21:09:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14576 states. [2022-11-18 21:09:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14576 to 11465. [2022-11-18 21:09:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11465 states, 11460 states have (on average 4.890663176265271) internal successors, (56047), 11464 states have internal predecessors, (56047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11465 states to 11465 states and 56047 transitions. [2022-11-18 21:09:17,725 INFO L78 Accepts]: Start accepts. Automaton has 11465 states and 56047 transitions. Word has length 15 [2022-11-18 21:09:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:17,726 INFO L495 AbstractCegarLoop]: Abstraction has 11465 states and 56047 transitions. [2022-11-18 21:09:17,726 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) [2022-11-18 21:09:17,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11465 states and 56047 transitions. [2022-11-18 21:09:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:09:17,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:17,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:17,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (160)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:17,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:17,931 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:09:17,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash 620312892, now seen corresponding path program 15 times [2022-11-18 21:09:17,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:09:17,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043140471] [2022-11-18 21:09:17,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:09:17,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:17,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:09:17,933 INFO L229 MonitoredProcess]: Starting monitored process 161 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:09:17,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Waiting until timeout for monitored process [2022-11-18 21:09:18,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:09:18,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:18,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:09:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:18,599 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:09:18,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:09:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:19,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:20,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:09:20,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043140471] [2022-11-18 21:09:20,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043140471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:09:20,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:09:20,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:09:20,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224523212] [2022-11-18 21:09:20,762 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:20,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:09:20,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:09:20,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:09:20,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:09:20,763 INFO L87 Difference]: Start difference. First operand 11465 states and 56047 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) [2022-11-18 21:09:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:26,385 INFO L93 Difference]: Finished difference Result 14863 states and 71509 transitions. [2022-11-18 21:09:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 21:09:26,387 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 [2022-11-18 21:09:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:26,446 INFO L225 Difference]: With dead ends: 14863 [2022-11-18 21:09:26,446 INFO L226 Difference]: Without dead ends: 14863 [2022-11-18 21:09:26,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-18 21:09:26,447 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 252 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:26,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 60 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 453 Invalid, 0 Unknown, 314 Unchecked, 3.4s Time] [2022-11-18 21:09:26,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14863 states. [2022-11-18 21:09:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14863 to 12193. [2022-11-18 21:09:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12193 states, 12188 states have (on average 4.929192648506728) internal successors, (60077), 12192 states have internal predecessors, (60077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12193 states to 12193 states and 60077 transitions. [2022-11-18 21:09:26,788 INFO L78 Accepts]: Start accepts. Automaton has 12193 states and 60077 transitions. Word has length 15 [2022-11-18 21:09:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:26,789 INFO L495 AbstractCegarLoop]: Abstraction has 12193 states and 60077 transitions. [2022-11-18 21:09:26,789 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) [2022-11-18 21:09:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 12193 states and 60077 transitions. [2022-11-18 21:09:26,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:09:26,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:26,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:26,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (161)] Ended with exit code 0 [2022-11-18 21:09:26,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:26,994 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:09:26,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash 620006333, now seen corresponding path program 12 times [2022-11-18 21:09:26,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:09:26,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542477059] [2022-11-18 21:09:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:09:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:09:26,996 INFO L229 MonitoredProcess]: Starting monitored process 162 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:09:26,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Waiting until timeout for monitored process [2022-11-18 21:09:27,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:09:27,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 21:09:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:27,728 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:09:27,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:09:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 21:09:28,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:30,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:09:30,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542477059] [2022-11-18 21:09:30,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542477059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:09:30,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:09:30,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2022-11-18 21:09:30,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103611050] [2022-11-18 21:09:30,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:30,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:09:30,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:09:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:09:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:09:30,099 INFO L87 Difference]: Start difference. First operand 12193 states and 60077 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:38,711 INFO L93 Difference]: Finished difference Result 13385 states and 63691 transitions. [2022-11-18 21:09:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:09:38,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-18 21:09:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:38,766 INFO L225 Difference]: With dead ends: 13385 [2022-11-18 21:09:38,767 INFO L226 Difference]: Without dead ends: 13385 [2022-11-18 21:09:38,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 21:09:38,767 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 276 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:38,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 118 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-18 21:09:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13385 states. [2022-11-18 21:09:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13385 to 12115. [2022-11-18 21:09:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12115 states, 12110 states have (on average 4.880429397192403) internal successors, (59102), 12114 states have internal predecessors, (59102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:39,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12115 states to 12115 states and 59102 transitions. [2022-11-18 21:09:39,074 INFO L78 Accepts]: Start accepts. Automaton has 12115 states and 59102 transitions. Word has length 15 [2022-11-18 21:09:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:39,074 INFO L495 AbstractCegarLoop]: Abstraction has 12115 states and 59102 transitions. [2022-11-18 21:09:39,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 12115 states and 59102 transitions. [2022-11-18 21:09:39,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:09:39,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:39,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:39,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (162)] Ended with exit code 0 [2022-11-18 21:09:39,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:39,280 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:09:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash 620572362, now seen corresponding path program 16 times [2022-11-18 21:09:39,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:09:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532809777] [2022-11-18 21:09:39,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:09:39,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:39,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:09:39,281 INFO L229 MonitoredProcess]: Starting monitored process 163 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:09:39,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Waiting until timeout for monitored process [2022-11-18 21:09:39,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:09:39,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:39,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:09:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:39,926 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:09:39,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:09:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:40,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:42,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:09:42,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532809777] [2022-11-18 21:09:42,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532809777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:09:42,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:09:42,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:09:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896091946] [2022-11-18 21:09:42,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:42,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:09:42,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:09:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:09:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:09:42,057 INFO L87 Difference]: Start difference. First operand 12115 states and 59102 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) [2022-11-18 21:09:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:45,074 INFO L93 Difference]: Finished difference Result 16352 states and 79273 transitions. [2022-11-18 21:09:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 21:09:45,075 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 [2022-11-18 21:09:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:45,143 INFO L225 Difference]: With dead ends: 16352 [2022-11-18 21:09:45,143 INFO L226 Difference]: Without dead ends: 16352 [2022-11-18 21:09:45,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-11-18 21:09:45,144 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 131 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:45,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 69 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 251 Invalid, 0 Unknown, 307 Unchecked, 1.4s Time] [2022-11-18 21:09:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16352 states. [2022-11-18 21:09:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16352 to 12979. [2022-11-18 21:09:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12979 states, 12974 states have (on average 4.906813627254509) internal successors, (63661), 12978 states have internal predecessors, (63661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12979 states to 12979 states and 63661 transitions. [2022-11-18 21:09:45,519 INFO L78 Accepts]: Start accepts. Automaton has 12979 states and 63661 transitions. Word has length 15 [2022-11-18 21:09:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:45,519 INFO L495 AbstractCegarLoop]: Abstraction has 12979 states and 63661 transitions. [2022-11-18 21:09:45,519 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) [2022-11-18 21:09:45,519 INFO L276 IsEmpty]: Start isEmpty. Operand 12979 states and 63661 transitions. [2022-11-18 21:09:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:09:45,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:45,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:45,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (163)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:45,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:45,725 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:09:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:45,725 INFO L85 PathProgramCache]: Analyzing trace with hash 607792302, now seen corresponding path program 17 times [2022-11-18 21:09:45,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:09:45,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662329329] [2022-11-18 21:09:45,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:09:45,726 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:45,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:09:45,727 INFO L229 MonitoredProcess]: Starting monitored process 164 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:09:45,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Waiting until timeout for monitored process [2022-11-18 21:09:46,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 21:09:46,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 21:09:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:46,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:09:46,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:09:47,117 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 [2022-11-18 21:09:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:47,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:47,476 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 [2022-11-18 21:09:47,508 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:09:47,511 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:09:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:49,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:09:49,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662329329] [2022-11-18 21:09:49,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662329329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:09:49,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:09:49,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:09:49,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797939623] [2022-11-18 21:09:49,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:49,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:09:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:09:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:09:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:09:49,653 INFO L87 Difference]: Start difference. First operand 12979 states and 63661 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) [2022-11-18 21:09:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:09:54,872 INFO L93 Difference]: Finished difference Result 17896 states and 88026 transitions. [2022-11-18 21:09:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 21:09:54,874 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 [2022-11-18 21:09:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:09:54,948 INFO L225 Difference]: With dead ends: 17896 [2022-11-18 21:09:54,948 INFO L226 Difference]: Without dead ends: 17896 [2022-11-18 21:09:54,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2022-11-18 21:09:54,948 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 127 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 21:09:54,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 63 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 376 Invalid, 0 Unknown, 217 Unchecked, 3.0s Time] [2022-11-18 21:09:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17896 states. [2022-11-18 21:09:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17896 to 13909. [2022-11-18 21:09:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13909 states, 13904 states have (on average 4.92433831990794) internal successors, (68468), 13908 states have internal predecessors, (68468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:09:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13909 states to 13909 states and 68468 transitions. [2022-11-18 21:09:55,518 INFO L78 Accepts]: Start accepts. Automaton has 13909 states and 68468 transitions. Word has length 15 [2022-11-18 21:09:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:09:55,519 INFO L495 AbstractCegarLoop]: Abstraction has 13909 states and 68468 transitions. [2022-11-18 21:09:55,519 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) [2022-11-18 21:09:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 13909 states and 68468 transitions. [2022-11-18 21:09:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:09:55,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:09:55,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:09:55,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (164)] Forceful destruction successful, exit code 0 [2022-11-18 21:09:55,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:55,730 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:09:55,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:09:55,732 INFO L85 PathProgramCache]: Analyzing trace with hash 615700092, now seen corresponding path program 18 times [2022-11-18 21:09:55,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:09:55,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071396142] [2022-11-18 21:09:55,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:09:55,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:09:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:09:55,733 INFO L229 MonitoredProcess]: Starting monitored process 165 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:09:55,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Waiting until timeout for monitored process [2022-11-18 21:09:56,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:09:56,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:09:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:09:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:09:56,361 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:09:56,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:09:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:56,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:09:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:09:58,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:09:58,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071396142] [2022-11-18 21:09:58,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071396142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:09:58,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:09:58,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:09:58,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542067688] [2022-11-18 21:09:58,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:09:58,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:09:58,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:09:58,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:09:58,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:09:58,388 INFO L87 Difference]: Start difference. First operand 13909 states and 68468 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) [2022-11-18 21:10:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:05,715 INFO L93 Difference]: Finished difference Result 20331 states and 96657 transitions. [2022-11-18 21:10:05,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 21:10:05,718 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 [2022-11-18 21:10:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:05,807 INFO L225 Difference]: With dead ends: 20331 [2022-11-18 21:10:05,807 INFO L226 Difference]: Without dead ends: 20331 [2022-11-18 21:10:05,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-11-18 21:10:05,808 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 281 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:05,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 94 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 568 Invalid, 0 Unknown, 704 Unchecked, 4.3s Time] [2022-11-18 21:10:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20331 states. [2022-11-18 21:10:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20331 to 12032. [2022-11-18 21:10:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12032 states, 12027 states have (on average 4.882264903966076) internal successors, (58719), 12031 states have internal predecessors, (58719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12032 states to 12032 states and 58719 transitions. [2022-11-18 21:10:06,225 INFO L78 Accepts]: Start accepts. Automaton has 12032 states and 58719 transitions. Word has length 15 [2022-11-18 21:10:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:06,225 INFO L495 AbstractCegarLoop]: Abstraction has 12032 states and 58719 transitions. [2022-11-18 21:10:06,225 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) [2022-11-18 21:10:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 12032 states and 58719 transitions. [2022-11-18 21:10:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:06,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:06,230 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:06,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (165)] Ended with exit code 0 [2022-11-18 21:10:06,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:06,431 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 208666888, now seen corresponding path program 9 times [2022-11-18 21:10:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:06,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367344038] [2022-11-18 21:10:06,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:10:06,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:06,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:06,433 INFO L229 MonitoredProcess]: Starting monitored process 166 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:06,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Waiting until timeout for monitored process [2022-11-18 21:10:06,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:10:06,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:10:06,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:07,084 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:07,084 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 [2022-11-18 21:10:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:07,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:09,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:09,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367344038] [2022-11-18 21:10:09,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367344038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:09,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:09,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:10:09,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535339051] [2022-11-18 21:10:09,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:09,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:10:09,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:10:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:10:09,196 INFO L87 Difference]: Start difference. First operand 12032 states and 58719 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) [2022-11-18 21:10:15,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:15,394 INFO L93 Difference]: Finished difference Result 16024 states and 76772 transitions. [2022-11-18 21:10:15,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 21:10:15,396 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 [2022-11-18 21:10:15,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:15,462 INFO L225 Difference]: With dead ends: 16024 [2022-11-18 21:10:15,462 INFO L226 Difference]: Without dead ends: 16024 [2022-11-18 21:10:15,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-11-18 21:10:15,462 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 308 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:15,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 65 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 500 Invalid, 0 Unknown, 346 Unchecked, 4.1s Time] [2022-11-18 21:10:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16024 states. [2022-11-18 21:10:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16024 to 13356. [2022-11-18 21:10:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13356 states, 13351 states have (on average 4.916485656505131) internal successors, (65640), 13355 states have internal predecessors, (65640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13356 states to 13356 states and 65640 transitions. [2022-11-18 21:10:16,037 INFO L78 Accepts]: Start accepts. Automaton has 13356 states and 65640 transitions. Word has length 15 [2022-11-18 21:10:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:16,037 INFO L495 AbstractCegarLoop]: Abstraction has 13356 states and 65640 transitions. [2022-11-18 21:10:16,037 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) [2022-11-18 21:10:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 13356 states and 65640 transitions. [2022-11-18 21:10:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:16,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:16,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:16,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (166)] Ended with exit code 0 [2022-11-18 21:10:16,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:16,243 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:16,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:16,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1783447594, now seen corresponding path program 9 times [2022-11-18 21:10:16,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:16,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682578628] [2022-11-18 21:10:16,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:10:16,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:16,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:16,246 INFO L229 MonitoredProcess]: Starting monitored process 167 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:16,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Waiting until timeout for monitored process [2022-11-18 21:10:16,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:10:16,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:16,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:10:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:16,896 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:16,897 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 [2022-11-18 21:10:17,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:17,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:18,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:18,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682578628] [2022-11-18 21:10:18,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682578628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:18,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:18,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:10:18,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470615595] [2022-11-18 21:10:18,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:18,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:10:18,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:10:18,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:10:18,957 INFO L87 Difference]: Start difference. First operand 13356 states and 65640 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) [2022-11-18 21:10:20,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:20,837 INFO L93 Difference]: Finished difference Result 13638 states and 66770 transitions. [2022-11-18 21:10:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 21:10:20,838 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 [2022-11-18 21:10:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:20,893 INFO L225 Difference]: With dead ends: 13638 [2022-11-18 21:10:20,894 INFO L226 Difference]: Without dead ends: 13638 [2022-11-18 21:10:20,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:10:20,894 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:20,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 72 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 146 Unchecked, 0.8s Time] [2022-11-18 21:10:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13638 states. [2022-11-18 21:10:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13638 to 13446. [2022-11-18 21:10:21,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13446 states, 13441 states have (on average 4.91198571534856) internal successors, (66022), 13445 states have internal predecessors, (66022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:21,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13446 states to 13446 states and 66022 transitions. [2022-11-18 21:10:21,247 INFO L78 Accepts]: Start accepts. Automaton has 13446 states and 66022 transitions. Word has length 15 [2022-11-18 21:10:21,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:21,247 INFO L495 AbstractCegarLoop]: Abstraction has 13446 states and 66022 transitions. [2022-11-18 21:10:21,247 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) [2022-11-18 21:10:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 13446 states and 66022 transitions. [2022-11-18 21:10:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:21,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:21,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:21,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (167)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:21,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:21,453 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1763061994, now seen corresponding path program 10 times [2022-11-18 21:10:21,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:21,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663374894] [2022-11-18 21:10:21,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:10:21,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:21,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:21,455 INFO L229 MonitoredProcess]: Starting monitored process 168 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:21,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Waiting until timeout for monitored process [2022-11-18 21:10:21,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:10:21,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 21:10:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:22,071 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:22,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:22,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:24,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:24,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663374894] [2022-11-18 21:10:24,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663374894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:24,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:24,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:10:24,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749469524] [2022-11-18 21:10:24,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:24,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:10:24,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:24,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:10:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:10:24,200 INFO L87 Difference]: Start difference. First operand 13446 states and 66022 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) [2022-11-18 21:10:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:25,462 INFO L93 Difference]: Finished difference Result 13871 states and 67603 transitions. [2022-11-18 21:10:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 21:10:25,463 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 [2022-11-18 21:10:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:25,521 INFO L225 Difference]: With dead ends: 13871 [2022-11-18 21:10:25,521 INFO L226 Difference]: Without dead ends: 13871 [2022-11-18 21:10:25,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:10:25,522 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 87 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:25,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 58 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 180 Unchecked, 0.6s Time] [2022-11-18 21:10:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13871 states. [2022-11-18 21:10:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13871 to 13462. [2022-11-18 21:10:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13462 states, 13457 states have (on average 4.9111986326818755) internal successors, (66090), 13461 states have internal predecessors, (66090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:25,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13462 states to 13462 states and 66090 transitions. [2022-11-18 21:10:25,958 INFO L78 Accepts]: Start accepts. Automaton has 13462 states and 66090 transitions. Word has length 15 [2022-11-18 21:10:25,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:25,958 INFO L495 AbstractCegarLoop]: Abstraction has 13462 states and 66090 transitions. [2022-11-18 21:10:25,958 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) [2022-11-18 21:10:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 13462 states and 66090 transitions. [2022-11-18 21:10:25,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:25,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:25,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:25,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (168)] Ended with exit code 0 [2022-11-18 21:10:26,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:26,165 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:26,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1803089589, now seen corresponding path program 1 times [2022-11-18 21:10:26,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:26,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310469735] [2022-11-18 21:10:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:26,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:26,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:26,167 INFO L229 MonitoredProcess]: Starting monitored process 169 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:26,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Waiting until timeout for monitored process [2022-11-18 21:10:26,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:26,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:26,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:26,787 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:26,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:27,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:27,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310469735] [2022-11-18 21:10:27,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310469735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:27,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:27,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:27,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453692332] [2022-11-18 21:10:27,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:27,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:27,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:27,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:27,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:27,939 INFO L87 Difference]: Start difference. First operand 13462 states and 66090 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) [2022-11-18 21:10:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:28,592 INFO L93 Difference]: Finished difference Result 14271 states and 69960 transitions. [2022-11-18 21:10:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:10:28,594 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 [2022-11-18 21:10:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:28,797 INFO L225 Difference]: With dead ends: 14271 [2022-11-18 21:10:28,798 INFO L226 Difference]: Without dead ends: 14271 [2022-11-18 21:10:28,798 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 [2022-11-18 21:10:28,798 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:28,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 64 Unchecked, 0.5s Time] [2022-11-18 21:10:28,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14271 states. [2022-11-18 21:10:29,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 13465. [2022-11-18 21:10:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13465 states, 13460 states have (on average 4.910921248142645) internal successors, (66101), 13464 states have internal predecessors, (66101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13465 states to 13465 states and 66101 transitions. [2022-11-18 21:10:29,147 INFO L78 Accepts]: Start accepts. Automaton has 13465 states and 66101 transitions. Word has length 15 [2022-11-18 21:10:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:29,147 INFO L495 AbstractCegarLoop]: Abstraction has 13465 states and 66101 transitions. [2022-11-18 21:10:29,147 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) [2022-11-18 21:10:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 13465 states and 66101 transitions. [2022-11-18 21:10:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:29,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:29,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:29,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (169)] Ended with exit code 0 [2022-11-18 21:10:29,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:29,355 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:29,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1803225090, now seen corresponding path program 1 times [2022-11-18 21:10:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:29,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747701341] [2022-11-18 21:10:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:29,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:29,358 INFO L229 MonitoredProcess]: Starting monitored process 170 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:29,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Waiting until timeout for monitored process [2022-11-18 21:10:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:29,969 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:29,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:30,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:31,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:31,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747701341] [2022-11-18 21:10:31,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747701341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:31,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:31,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:31,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014118390] [2022-11-18 21:10:31,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:31,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:31,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:31,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:31,064 INFO L87 Difference]: Start difference. First operand 13465 states and 66101 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) [2022-11-18 21:10:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:31,810 INFO L93 Difference]: Finished difference Result 14441 states and 70569 transitions. [2022-11-18 21:10:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:10:31,812 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 [2022-11-18 21:10:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:31,874 INFO L225 Difference]: With dead ends: 14441 [2022-11-18 21:10:31,874 INFO L226 Difference]: Without dead ends: 14441 [2022-11-18 21:10:31,874 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 [2022-11-18 21:10:31,874 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:31,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 32 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 190 Unchecked, 0.6s Time] [2022-11-18 21:10:31,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14441 states. [2022-11-18 21:10:32,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14441 to 13462. [2022-11-18 21:10:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13462 states, 13457 states have (on average 4.9111986326818755) internal successors, (66090), 13461 states have internal predecessors, (66090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13462 states to 13462 states and 66090 transitions. [2022-11-18 21:10:32,239 INFO L78 Accepts]: Start accepts. Automaton has 13462 states and 66090 transitions. Word has length 15 [2022-11-18 21:10:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:32,239 INFO L495 AbstractCegarLoop]: Abstraction has 13462 states and 66090 transitions. [2022-11-18 21:10:32,239 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) [2022-11-18 21:10:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 13462 states and 66090 transitions. [2022-11-18 21:10:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:32,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:32,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:32,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (170)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:32,446 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1769127849, now seen corresponding path program 2 times [2022-11-18 21:10:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:32,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612141107] [2022-11-18 21:10:32,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:10:32,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:32,448 INFO L229 MonitoredProcess]: Starting monitored process 171 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:32,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Waiting until timeout for monitored process [2022-11-18 21:10:32,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:10:32,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:32,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:32,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:33,111 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:33,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:33,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:34,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:34,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612141107] [2022-11-18 21:10:34,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612141107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:34,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:34,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:34,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053225955] [2022-11-18 21:10:34,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:34,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:34,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:34,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:34,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:34,215 INFO L87 Difference]: Start difference. First operand 13462 states and 66090 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) [2022-11-18 21:10:34,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:34,770 INFO L93 Difference]: Finished difference Result 14023 states and 68695 transitions. [2022-11-18 21:10:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:10:34,771 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 [2022-11-18 21:10:34,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:34,831 INFO L225 Difference]: With dead ends: 14023 [2022-11-18 21:10:34,831 INFO L226 Difference]: Without dead ends: 14023 [2022-11-18 21:10:34,831 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 [2022-11-18 21:10:34,831 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:34,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 21:10:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2022-11-18 21:10:35,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 13467. [2022-11-18 21:10:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13467 states, 13462 states have (on average 4.910860199078889) internal successors, (66110), 13466 states have internal predecessors, (66110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13467 states to 13467 states and 66110 transitions. [2022-11-18 21:10:35,188 INFO L78 Accepts]: Start accepts. Automaton has 13467 states and 66110 transitions. Word has length 15 [2022-11-18 21:10:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:35,188 INFO L495 AbstractCegarLoop]: Abstraction has 13467 states and 66110 transitions. [2022-11-18 21:10:35,189 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) [2022-11-18 21:10:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 13467 states and 66110 transitions. [2022-11-18 21:10:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:35,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:35,194 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:35,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (171)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:35,395 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1773328380, now seen corresponding path program 2 times [2022-11-18 21:10:35,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:35,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581035979] [2022-11-18 21:10:35,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:10:35,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:35,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:35,397 INFO L229 MonitoredProcess]: Starting monitored process 172 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:35,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Waiting until timeout for monitored process [2022-11-18 21:10:35,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:10:35,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:35,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:36,059 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:36,059 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 [2022-11-18 21:10:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:36,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:37,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:37,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581035979] [2022-11-18 21:10:37,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581035979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:37,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:37,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:37,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352511961] [2022-11-18 21:10:37,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:37,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:37,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:37,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:37,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:37,217 INFO L87 Difference]: Start difference. First operand 13467 states and 66110 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) [2022-11-18 21:10:37,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:37,889 INFO L93 Difference]: Finished difference Result 13998 states and 68783 transitions. [2022-11-18 21:10:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:10:37,891 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 [2022-11-18 21:10:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:37,947 INFO L225 Difference]: With dead ends: 13998 [2022-11-18 21:10:37,947 INFO L226 Difference]: Without dead ends: 13998 [2022-11-18 21:10:37,947 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 [2022-11-18 21:10:37,948 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:37,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-11-18 21:10:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13998 states. [2022-11-18 21:10:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13998 to 13471. [2022-11-18 21:10:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13471 states, 13466 states have (on average 4.910589633150156) internal successors, (66126), 13470 states have internal predecessors, (66126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13471 states to 13471 states and 66126 transitions. [2022-11-18 21:10:38,296 INFO L78 Accepts]: Start accepts. Automaton has 13471 states and 66126 transitions. Word has length 15 [2022-11-18 21:10:38,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:38,296 INFO L495 AbstractCegarLoop]: Abstraction has 13471 states and 66126 transitions. [2022-11-18 21:10:38,296 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) [2022-11-18 21:10:38,296 INFO L276 IsEmpty]: Start isEmpty. Operand 13471 states and 66126 transitions. [2022-11-18 21:10:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:38,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:38,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:38,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (172)] Ended with exit code 0 [2022-11-18 21:10:38,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:38,505 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1773596499, now seen corresponding path program 3 times [2022-11-18 21:10:38,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:38,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078818006] [2022-11-18 21:10:38,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:10:38,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:38,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:38,507 INFO L229 MonitoredProcess]: Starting monitored process 173 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:38,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Waiting until timeout for monitored process [2022-11-18 21:10:38,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:10:38,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:38,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:39,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:39,172 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:39,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:39,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:40,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:40,290 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:40,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078818006] [2022-11-18 21:10:40,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078818006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:40,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:40,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:40,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902235948] [2022-11-18 21:10:40,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:40,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:40,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:40,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:40,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:40,291 INFO L87 Difference]: Start difference. First operand 13471 states and 66126 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) [2022-11-18 21:10:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:40,868 INFO L93 Difference]: Finished difference Result 14015 states and 68659 transitions. [2022-11-18 21:10:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:10:40,870 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 [2022-11-18 21:10:40,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:40,926 INFO L225 Difference]: With dead ends: 14015 [2022-11-18 21:10:40,926 INFO L226 Difference]: Without dead ends: 14015 [2022-11-18 21:10:40,926 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 [2022-11-18 21:10:40,926 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:40,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-18 21:10:40,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14015 states. [2022-11-18 21:10:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14015 to 13478. [2022-11-18 21:10:41,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13478 states, 13473 states have (on average 4.910116529355006) internal successors, (66154), 13477 states have internal predecessors, (66154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13478 states to 13478 states and 66154 transitions. [2022-11-18 21:10:41,280 INFO L78 Accepts]: Start accepts. Automaton has 13478 states and 66154 transitions. Word has length 15 [2022-11-18 21:10:41,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:41,281 INFO L495 AbstractCegarLoop]: Abstraction has 13478 states and 66154 transitions. [2022-11-18 21:10:41,281 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) [2022-11-18 21:10:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 13478 states and 66154 transitions. [2022-11-18 21:10:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:41,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:41,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:41,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (173)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:41,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:41,487 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:41,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:41,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1773580689, now seen corresponding path program 4 times [2022-11-18 21:10:41,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:41,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214213182] [2022-11-18 21:10:41,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:10:41,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:41,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:41,489 INFO L229 MonitoredProcess]: Starting monitored process 174 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:41,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Waiting until timeout for monitored process [2022-11-18 21:10:41,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:10:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:41,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:42,110 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:42,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:42,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:43,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:43,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214213182] [2022-11-18 21:10:43,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214213182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:43,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:43,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:43,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93325863] [2022-11-18 21:10:43,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:43,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:43,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:43,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:43,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:43,178 INFO L87 Difference]: Start difference. First operand 13478 states and 66154 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) [2022-11-18 21:10:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:43,436 INFO L93 Difference]: Finished difference Result 13833 states and 67831 transitions. [2022-11-18 21:10:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:10:43,437 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 [2022-11-18 21:10:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:43,493 INFO L225 Difference]: With dead ends: 13833 [2022-11-18 21:10:43,493 INFO L226 Difference]: Without dead ends: 13833 [2022-11-18 21:10:43,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:10:43,494 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:43,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-11-18 21:10:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13833 states. [2022-11-18 21:10:43,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13833 to 13479. [2022-11-18 21:10:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13474 states have (on average 4.910048983226956) internal successors, (66158), 13478 states have internal predecessors, (66158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 66158 transitions. [2022-11-18 21:10:43,859 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 66158 transitions. Word has length 15 [2022-11-18 21:10:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:43,860 INFO L495 AbstractCegarLoop]: Abstraction has 13479 states and 66158 transitions. [2022-11-18 21:10:43,860 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) [2022-11-18 21:10:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 66158 transitions. [2022-11-18 21:10:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:43,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:43,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:43,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (174)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:44,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:44,066 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:44,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1773585060, now seen corresponding path program 3 times [2022-11-18 21:10:44,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:44,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826675382] [2022-11-18 21:10:44,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:10:44,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:44,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:44,068 INFO L229 MonitoredProcess]: Starting monitored process 175 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:44,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Waiting until timeout for monitored process [2022-11-18 21:10:44,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:10:44,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:44,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:44,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:44,711 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:44,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:45,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:45,886 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:45,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826675382] [2022-11-18 21:10:45,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826675382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:45,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:45,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703231420] [2022-11-18 21:10:45,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:45,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:45,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:45,887 INFO L87 Difference]: Start difference. First operand 13479 states and 66158 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) [2022-11-18 21:10:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:46,643 INFO L93 Difference]: Finished difference Result 14253 states and 70111 transitions. [2022-11-18 21:10:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:10:46,645 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 [2022-11-18 21:10:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:46,702 INFO L225 Difference]: With dead ends: 14253 [2022-11-18 21:10:46,702 INFO L226 Difference]: Without dead ends: 14253 [2022-11-18 21:10:46,702 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 [2022-11-18 21:10:46,702 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:46,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 46 Unchecked, 0.5s Time] [2022-11-18 21:10:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14253 states. [2022-11-18 21:10:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14253 to 13523. [2022-11-18 21:10:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13523 states, 13518 states have (on average 4.9135966859002815) internal successors, (66422), 13522 states have internal predecessors, (66422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13523 states to 13523 states and 66422 transitions. [2022-11-18 21:10:47,195 INFO L78 Accepts]: Start accepts. Automaton has 13523 states and 66422 transitions. Word has length 15 [2022-11-18 21:10:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:47,195 INFO L495 AbstractCegarLoop]: Abstraction has 13523 states and 66422 transitions. [2022-11-18 21:10:47,195 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) [2022-11-18 21:10:47,196 INFO L276 IsEmpty]: Start isEmpty. Operand 13523 states and 66422 transitions. [2022-11-18 21:10:47,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:47,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:47,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:47,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (175)] Ended with exit code 0 [2022-11-18 21:10:47,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:47,402 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:47,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:47,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1773732000, now seen corresponding path program 4 times [2022-11-18 21:10:47,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:47,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214135915] [2022-11-18 21:10:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:10:47,403 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 [2022-11-18 21:10:47,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:47,404 INFO L229 MonitoredProcess]: Starting monitored process 176 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:47,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Waiting until timeout for monitored process [2022-11-18 21:10:47,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:10:47,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:47,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:47,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:48,023 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:48,023 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 [2022-11-18 21:10:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:48,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 21:10:49,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:49,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214135915] [2022-11-18 21:10:49,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214135915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:49,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:49,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559506677] [2022-11-18 21:10:49,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:49,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:49,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:49,099 INFO L87 Difference]: Start difference. First operand 13523 states and 66422 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) [2022-11-18 21:10:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:49,692 INFO L93 Difference]: Finished difference Result 14160 states and 69683 transitions. [2022-11-18 21:10:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:10:49,694 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 [2022-11-18 21:10:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:49,754 INFO L225 Difference]: With dead ends: 14160 [2022-11-18 21:10:49,754 INFO L226 Difference]: Without dead ends: 14160 [2022-11-18 21:10:49,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:10:49,754 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:49,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 20 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 73 Unchecked, 0.4s Time] [2022-11-18 21:10:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2022-11-18 21:10:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 13526. [2022-11-18 21:10:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13521 states have (on average 4.913541897788625) internal successors, (66436), 13525 states have internal predecessors, (66436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 66436 transitions. [2022-11-18 21:10:50,126 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 66436 transitions. Word has length 15 [2022-11-18 21:10:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:50,126 INFO L495 AbstractCegarLoop]: Abstraction has 13526 states and 66436 transitions. [2022-11-18 21:10:50,127 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) [2022-11-18 21:10:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 66436 transitions. [2022-11-18 21:10:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:50,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:50,132 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:50,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (176)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:50,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:50,333 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:50,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:50,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1243704989, now seen corresponding path program 5 times [2022-11-18 21:10:50,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:50,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46419105] [2022-11-18 21:10:50,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:10:50,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:50,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:50,335 INFO L229 MonitoredProcess]: Starting monitored process 177 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:50,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Waiting until timeout for monitored process [2022-11-18 21:10:50,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:10:50,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:50,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:10:50,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:51,060 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:51,061 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 [2022-11-18 21:10:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:51,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:52,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:52,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46419105] [2022-11-18 21:10:52,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46419105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:52,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:52,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:10:52,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014553666] [2022-11-18 21:10:52,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:52,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:10:52,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:52,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:10:52,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:10:52,432 INFO L87 Difference]: Start difference. First operand 13526 states and 66436 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) [2022-11-18 21:10:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:53,157 INFO L93 Difference]: Finished difference Result 14270 states and 70054 transitions. [2022-11-18 21:10:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:10:53,159 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 [2022-11-18 21:10:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:53,219 INFO L225 Difference]: With dead ends: 14270 [2022-11-18 21:10:53,219 INFO L226 Difference]: Without dead ends: 14270 [2022-11-18 21:10:53,219 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 [2022-11-18 21:10:53,220 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:53,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-11-18 21:10:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14270 states. [2022-11-18 21:10:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 13528. [2022-11-18 21:10:53,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 13523 states have (on average 4.913406788434519) internal successors, (66444), 13527 states have internal predecessors, (66444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 66444 transitions. [2022-11-18 21:10:53,586 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 66444 transitions. Word has length 15 [2022-11-18 21:10:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:53,586 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 66444 transitions. [2022-11-18 21:10:53,586 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) [2022-11-18 21:10:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 66444 transitions. [2022-11-18 21:10:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:53,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:53,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:53,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (177)] Ended with exit code 0 [2022-11-18 21:10:53,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:53,793 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1239504458, now seen corresponding path program 5 times [2022-11-18 21:10:53,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:53,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931782700] [2022-11-18 21:10:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:10:53,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:53,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:53,795 INFO L229 MonitoredProcess]: Starting monitored process 178 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:53,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Waiting until timeout for monitored process [2022-11-18 21:10:54,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:10:54,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:10:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:10:54,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:54,513 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:54,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:54,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:10:55,893 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:55,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931782700] [2022-11-18 21:10:55,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931782700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:55,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:55,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:10:55,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780804916] [2022-11-18 21:10:55,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:55,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:10:55,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:10:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:10:55,894 INFO L87 Difference]: Start difference. First operand 13528 states and 66444 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) [2022-11-18 21:10:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:56,609 INFO L93 Difference]: Finished difference Result 13825 states and 67950 transitions. [2022-11-18 21:10:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:10:56,611 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 [2022-11-18 21:10:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:56,668 INFO L225 Difference]: With dead ends: 13825 [2022-11-18 21:10:56,668 INFO L226 Difference]: Without dead ends: 13825 [2022-11-18 21:10:56,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 21:10:56,669 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:56,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 28 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-11-18 21:10:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2022-11-18 21:10:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 13528. [2022-11-18 21:10:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 13523 states have (on average 4.913406788434519) internal successors, (66444), 13527 states have internal predecessors, (66444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 66444 transitions. [2022-11-18 21:10:57,023 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 66444 transitions. Word has length 15 [2022-11-18 21:10:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:57,023 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 66444 transitions. [2022-11-18 21:10:57,024 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) [2022-11-18 21:10:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 66444 transitions. [2022-11-18 21:10:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:57,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:57,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:57,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (178)] Forceful destruction successful, exit code 0 [2022-11-18 21:10:57,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:57,230 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:10:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:10:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1998186975, now seen corresponding path program 1 times [2022-11-18 21:10:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:10:57,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345449179] [2022-11-18 21:10:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:10:57,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:10:57,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:10:57,232 INFO L229 MonitoredProcess]: Starting monitored process 179 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:10:57,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Waiting until timeout for monitored process [2022-11-18 21:10:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:10:57,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:10:57,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:10:57,863 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:10:57,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:10:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:10:58,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:10:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:10:58,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:10:58,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345449179] [2022-11-18 21:10:58,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345449179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:10:58,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:10:58,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:10:58,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784455502] [2022-11-18 21:10:58,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:10:58,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:10:58,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:10:58,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:10:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:10:58,930 INFO L87 Difference]: Start difference. First operand 13528 states and 66444 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) [2022-11-18 21:10:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:10:59,428 INFO L93 Difference]: Finished difference Result 14272 states and 70131 transitions. [2022-11-18 21:10:59,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:10:59,430 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 [2022-11-18 21:10:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:10:59,488 INFO L225 Difference]: With dead ends: 14272 [2022-11-18 21:10:59,488 INFO L226 Difference]: Without dead ends: 14272 [2022-11-18 21:10:59,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:10:59,488 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:10:59,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-11-18 21:10:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2022-11-18 21:10:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 13530. [2022-11-18 21:10:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13530 states, 13525 states have (on average 4.913271719038817) internal successors, (66452), 13529 states have internal predecessors, (66452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:10:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13530 states to 13530 states and 66452 transitions. [2022-11-18 21:10:59,848 INFO L78 Accepts]: Start accepts. Automaton has 13530 states and 66452 transitions. Word has length 15 [2022-11-18 21:10:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:10:59,849 INFO L495 AbstractCegarLoop]: Abstraction has 13530 states and 66452 transitions. [2022-11-18 21:10:59,849 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) [2022-11-18 21:10:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 13530 states and 66452 transitions. [2022-11-18 21:10:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:10:59,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:10:59,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:10:59,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (179)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:00,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:00,055 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1998443655, now seen corresponding path program 2 times [2022-11-18 21:11:00,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:00,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096644500] [2022-11-18 21:11:00,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:11:00,055 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:00,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:00,056 INFO L229 MonitoredProcess]: Starting monitored process 180 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:00,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Waiting until timeout for monitored process [2022-11-18 21:11:00,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:11:00,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:00,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:00,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:00,725 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:00,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:01,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:01,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:01,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096644500] [2022-11-18 21:11:01,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096644500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:01,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:01,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:01,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48012814] [2022-11-18 21:11:01,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:01,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:01,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:01,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:01,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:01,905 INFO L87 Difference]: Start difference. First operand 13530 states and 66452 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) [2022-11-18 21:11:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:02,499 INFO L93 Difference]: Finished difference Result 14777 states and 72502 transitions. [2022-11-18 21:11:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:02,501 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 [2022-11-18 21:11:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:02,562 INFO L225 Difference]: With dead ends: 14777 [2022-11-18 21:11:02,562 INFO L226 Difference]: Without dead ends: 14777 [2022-11-18 21:11:02,562 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 [2022-11-18 21:11:02,563 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:02,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 20 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 69 Unchecked, 0.4s Time] [2022-11-18 21:11:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14777 states. [2022-11-18 21:11:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14777 to 13553. [2022-11-18 21:11:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13553 states, 13548 states have (on average 4.913049896663714) internal successors, (66562), 13552 states have internal predecessors, (66562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13553 states to 13553 states and 66562 transitions. [2022-11-18 21:11:02,928 INFO L78 Accepts]: Start accepts. Automaton has 13553 states and 66562 transitions. Word has length 15 [2022-11-18 21:11:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:02,928 INFO L495 AbstractCegarLoop]: Abstraction has 13553 states and 66562 transitions. [2022-11-18 21:11:02,928 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) [2022-11-18 21:11:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 13553 states and 66562 transitions. [2022-11-18 21:11:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:02,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:02,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:02,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (180)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:03,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:03,134 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:03,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1998439067, now seen corresponding path program 6 times [2022-11-18 21:11:03,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:03,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476506793] [2022-11-18 21:11:03,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:11:03,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:03,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:03,136 INFO L229 MonitoredProcess]: Starting monitored process 181 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:03,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Waiting until timeout for monitored process [2022-11-18 21:11:03,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:11:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:03,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:03,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:03,802 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:03,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:04,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:04,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:04,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476506793] [2022-11-18 21:11:04,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476506793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:04,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:04,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:04,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098720741] [2022-11-18 21:11:04,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:04,960 INFO L87 Difference]: Start difference. First operand 13553 states and 66562 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) [2022-11-18 21:11:05,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:05,566 INFO L93 Difference]: Finished difference Result 14071 states and 68976 transitions. [2022-11-18 21:11:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:05,568 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 [2022-11-18 21:11:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:05,624 INFO L225 Difference]: With dead ends: 14071 [2022-11-18 21:11:05,624 INFO L226 Difference]: Without dead ends: 14071 [2022-11-18 21:11:05,625 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 [2022-11-18 21:11:05,625 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:05,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-11-18 21:11:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14071 states. [2022-11-18 21:11:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14071 to 13589. [2022-11-18 21:11:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13589 states, 13584 states have (on average 4.913280329799765) internal successors, (66742), 13588 states have internal predecessors, (66742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:05,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13589 states to 13589 states and 66742 transitions. [2022-11-18 21:11:05,976 INFO L78 Accepts]: Start accepts. Automaton has 13589 states and 66742 transitions. Word has length 15 [2022-11-18 21:11:05,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:05,977 INFO L495 AbstractCegarLoop]: Abstraction has 13589 states and 66742 transitions. [2022-11-18 21:11:05,977 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) [2022-11-18 21:11:05,977 INFO L276 IsEmpty]: Start isEmpty. Operand 13589 states and 66742 transitions. [2022-11-18 21:11:05,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:05,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:05,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:05,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (181)] Ended with exit code 0 [2022-11-18 21:11:06,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:06,183 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:06,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:06,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1998590595, now seen corresponding path program 3 times [2022-11-18 21:11:06,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:06,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063533706] [2022-11-18 21:11:06,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:11:06,184 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:06,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:06,185 INFO L229 MonitoredProcess]: Starting monitored process 182 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:06,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Waiting until timeout for monitored process [2022-11-18 21:11:06,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:11:06,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:06,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:06,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:06,859 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:06,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:07,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:08,016 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063533706] [2022-11-18 21:11:08,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063533706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:08,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:08,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:08,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370047444] [2022-11-18 21:11:08,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:08,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:08,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:08,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:08,017 INFO L87 Difference]: Start difference. First operand 13589 states and 66742 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) [2022-11-18 21:11:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:08,597 INFO L93 Difference]: Finished difference Result 15331 states and 75266 transitions. [2022-11-18 21:11:08,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:08,599 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 [2022-11-18 21:11:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:08,664 INFO L225 Difference]: With dead ends: 15331 [2022-11-18 21:11:08,664 INFO L226 Difference]: Without dead ends: 15331 [2022-11-18 21:11:08,664 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 [2022-11-18 21:11:08,664 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:08,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 23 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-11-18 21:11:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15331 states. [2022-11-18 21:11:08,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15331 to 13660. [2022-11-18 21:11:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13660 states, 13655 states have (on average 4.918564628341267) internal successors, (67163), 13659 states have internal predecessors, (67163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13660 states to 13660 states and 67163 transitions. [2022-11-18 21:11:09,044 INFO L78 Accepts]: Start accepts. Automaton has 13660 states and 67163 transitions. Word has length 15 [2022-11-18 21:11:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:09,044 INFO L495 AbstractCegarLoop]: Abstraction has 13660 states and 67163 transitions. [2022-11-18 21:11:09,044 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) [2022-11-18 21:11:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 13660 states and 67163 transitions. [2022-11-18 21:11:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:09,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:09,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:09,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (182)] Ended with exit code 0 [2022-11-18 21:11:09,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:09,250 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:09,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1998448367, now seen corresponding path program 7 times [2022-11-18 21:11:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:09,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959792308] [2022-11-18 21:11:09,251 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:11:09,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:09,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:09,252 INFO L229 MonitoredProcess]: Starting monitored process 183 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:09,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Waiting until timeout for monitored process [2022-11-18 21:11:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:09,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:09,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:09,905 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:09,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:10,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:11,012 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:11,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959792308] [2022-11-18 21:11:11,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959792308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:11,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:11,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362260868] [2022-11-18 21:11:11,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:11,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:11,013 INFO L87 Difference]: Start difference. First operand 13660 states and 67163 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) [2022-11-18 21:11:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:11,317 INFO L93 Difference]: Finished difference Result 14076 states and 69109 transitions. [2022-11-18 21:11:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:11,318 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 [2022-11-18 21:11:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:11,377 INFO L225 Difference]: With dead ends: 14076 [2022-11-18 21:11:11,377 INFO L226 Difference]: Without dead ends: 14076 [2022-11-18 21:11:11,377 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 [2022-11-18 21:11:11,377 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:11,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 22 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-11-18 21:11:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14076 states. [2022-11-18 21:11:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14076 to 13660. [2022-11-18 21:11:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13660 states, 13655 states have (on average 4.918564628341267) internal successors, (67163), 13659 states have internal predecessors, (67163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13660 states to 13660 states and 67163 transitions. [2022-11-18 21:11:11,731 INFO L78 Accepts]: Start accepts. Automaton has 13660 states and 67163 transitions. Word has length 15 [2022-11-18 21:11:11,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:11,731 INFO L495 AbstractCegarLoop]: Abstraction has 13660 states and 67163 transitions. [2022-11-18 21:11:11,731 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) [2022-11-18 21:11:11,732 INFO L276 IsEmpty]: Start isEmpty. Operand 13660 states and 67163 transitions. [2022-11-18 21:11:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:11,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:11,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:11,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (183)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:11,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:11,938 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2128671555, now seen corresponding path program 4 times [2022-11-18 21:11:11,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:11,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051050442] [2022-11-18 21:11:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:11:11,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:11,939 INFO L229 MonitoredProcess]: Starting monitored process 184 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:11,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Waiting until timeout for monitored process [2022-11-18 21:11:12,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:11:12,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:12,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:12,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:12,594 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:12,594 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 [2022-11-18 21:11:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:13,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:13,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051050442] [2022-11-18 21:11:13,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051050442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:13,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:13,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:13,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955451993] [2022-11-18 21:11:13,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:13,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:13,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:13,716 INFO L87 Difference]: Start difference. First operand 13660 states and 67163 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) [2022-11-18 21:11:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:14,354 INFO L93 Difference]: Finished difference Result 14282 states and 70270 transitions. [2022-11-18 21:11:14,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:14,356 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 [2022-11-18 21:11:14,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:14,412 INFO L225 Difference]: With dead ends: 14282 [2022-11-18 21:11:14,412 INFO L226 Difference]: Without dead ends: 14282 [2022-11-18 21:11:14,412 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 [2022-11-18 21:11:14,412 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:14,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-11-18 21:11:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14282 states. [2022-11-18 21:11:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14282 to 13661. [2022-11-18 21:11:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13661 states, 13656 states have (on average 4.918570591681312) internal successors, (67168), 13660 states have internal predecessors, (67168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13661 states to 13661 states and 67168 transitions. [2022-11-18 21:11:14,781 INFO L78 Accepts]: Start accepts. Automaton has 13661 states and 67168 transitions. Word has length 15 [2022-11-18 21:11:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:14,781 INFO L495 AbstractCegarLoop]: Abstraction has 13661 states and 67168 transitions. [2022-11-18 21:11:14,781 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) [2022-11-18 21:11:14,781 INFO L276 IsEmpty]: Start isEmpty. Operand 13661 states and 67168 transitions. [2022-11-18 21:11:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:14,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:14,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:14,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (184)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:15,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:15,003 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash -2128655745, now seen corresponding path program 5 times [2022-11-18 21:11:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:15,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930244573] [2022-11-18 21:11:15,004 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:11:15,004 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:15,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:15,005 INFO L229 MonitoredProcess]: Starting monitored process 185 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:15,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Waiting until timeout for monitored process [2022-11-18 21:11:15,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:11:15,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:11:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:15,695 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:15,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:16,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:16,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:11:17,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930244573] [2022-11-18 21:11:17,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930244573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:17,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:17,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:11:17,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561177559] [2022-11-18 21:11:17,047 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:17,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:11:17,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:11:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:11:17,048 INFO L87 Difference]: Start difference. First operand 13661 states and 67168 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) [2022-11-18 21:11:17,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:17,641 INFO L93 Difference]: Finished difference Result 14173 states and 69780 transitions. [2022-11-18 21:11:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:11:17,643 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 [2022-11-18 21:11:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:17,704 INFO L225 Difference]: With dead ends: 14173 [2022-11-18 21:11:17,704 INFO L226 Difference]: Without dead ends: 14173 [2022-11-18 21:11:17,704 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 [2022-11-18 21:11:17,705 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:17,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-11-18 21:11:17,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14173 states. [2022-11-18 21:11:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14173 to 13662. [2022-11-18 21:11:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13662 states, 13657 states have (on average 4.918576554148056) internal successors, (67173), 13661 states have internal predecessors, (67173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 67173 transitions. [2022-11-18 21:11:18,084 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 67173 transitions. Word has length 15 [2022-11-18 21:11:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 13662 states and 67173 transitions. [2022-11-18 21:11:18,084 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) [2022-11-18 21:11:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 67173 transitions. [2022-11-18 21:11:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:18,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:18,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:18,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (185)] Ended with exit code 0 [2022-11-18 21:11:18,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:18,290 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:18,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2128655528, now seen corresponding path program 6 times [2022-11-18 21:11:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:18,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030318388] [2022-11-18 21:11:18,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:11:18,291 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 [2022-11-18 21:11:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:18,292 INFO L229 MonitoredProcess]: Starting monitored process 186 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:18,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Waiting until timeout for monitored process [2022-11-18 21:11:18,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:11:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:18,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:18,966 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:18,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:19,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:20,134 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:20,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030318388] [2022-11-18 21:11:20,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030318388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:20,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:20,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:20,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570461485] [2022-11-18 21:11:20,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:20,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:20,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:20,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:20,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:20,135 INFO L87 Difference]: Start difference. First operand 13662 states and 67173 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) [2022-11-18 21:11:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:20,672 INFO L93 Difference]: Finished difference Result 14137 states and 69594 transitions. [2022-11-18 21:11:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:20,675 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 [2022-11-18 21:11:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:20,734 INFO L225 Difference]: With dead ends: 14137 [2022-11-18 21:11:20,734 INFO L226 Difference]: Without dead ends: 14137 [2022-11-18 21:11:20,734 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 [2022-11-18 21:11:20,734 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:20,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2022-11-18 21:11:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14137 states. [2022-11-18 21:11:21,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14137 to 13644. [2022-11-18 21:11:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13639 states have (on average 4.917149351125449) internal successors, (67065), 13643 states have internal predecessors, (67065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 67065 transitions. [2022-11-18 21:11:21,123 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 67065 transitions. Word has length 15 [2022-11-18 21:11:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:21,123 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 67065 transitions. [2022-11-18 21:11:21,123 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) [2022-11-18 21:11:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 67065 transitions. [2022-11-18 21:11:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:21,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:21,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:21,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (186)] Ended with exit code 0 [2022-11-18 21:11:21,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:21,330 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2128655001, now seen corresponding path program 1 times [2022-11-18 21:11:21,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:21,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739055173] [2022-11-18 21:11:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:11:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:21,331 INFO L229 MonitoredProcess]: Starting monitored process 187 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:21,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Waiting until timeout for monitored process [2022-11-18 21:11:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:21,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:21,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:21,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:22,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:23,106 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:23,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739055173] [2022-11-18 21:11:23,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739055173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:23,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:23,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:23,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736492703] [2022-11-18 21:11:23,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:23,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:23,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:23,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:23,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:23,108 INFO L87 Difference]: Start difference. First operand 13644 states and 67065 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) [2022-11-18 21:11:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:23,754 INFO L93 Difference]: Finished difference Result 14186 states and 69993 transitions. [2022-11-18 21:11:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:23,756 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 [2022-11-18 21:11:23,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:23,816 INFO L225 Difference]: With dead ends: 14186 [2022-11-18 21:11:23,816 INFO L226 Difference]: Without dead ends: 14186 [2022-11-18 21:11:23,816 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 [2022-11-18 21:11:23,816 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:23,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 17 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 33 Unchecked, 0.4s Time] [2022-11-18 21:11:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2022-11-18 21:11:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 13644. [2022-11-18 21:11:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13639 states have (on average 4.917149351125449) internal successors, (67065), 13643 states have internal predecessors, (67065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 67065 transitions. [2022-11-18 21:11:24,251 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 67065 transitions. Word has length 15 [2022-11-18 21:11:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:24,251 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 67065 transitions. [2022-11-18 21:11:24,251 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) [2022-11-18 21:11:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 67065 transitions. [2022-11-18 21:11:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:24,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:24,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:24,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (187)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:24,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:24,457 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:24,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2128664828, now seen corresponding path program 7 times [2022-11-18 21:11:24,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:24,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940284472] [2022-11-18 21:11:24,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:11:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:24,459 INFO L229 MonitoredProcess]: Starting monitored process 188 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:24,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Waiting until timeout for monitored process [2022-11-18 21:11:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:24,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:25,113 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:25,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:25,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:26,194 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940284472] [2022-11-18 21:11:26,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940284472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:26,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:26,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:26,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681666718] [2022-11-18 21:11:26,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:26,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:26,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:26,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:26,196 INFO L87 Difference]: Start difference. First operand 13644 states and 67065 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) [2022-11-18 21:11:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:26,727 INFO L93 Difference]: Finished difference Result 14073 states and 69257 transitions. [2022-11-18 21:11:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:26,729 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 [2022-11-18 21:11:26,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:26,788 INFO L225 Difference]: With dead ends: 14073 [2022-11-18 21:11:26,788 INFO L226 Difference]: Without dead ends: 14073 [2022-11-18 21:11:26,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:11:26,789 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:26,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-11-18 21:11:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14073 states. [2022-11-18 21:11:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14073 to 13644. [2022-11-18 21:11:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13644 states, 13639 states have (on average 4.917149351125449) internal successors, (67065), 13643 states have internal predecessors, (67065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13644 states to 13644 states and 67065 transitions. [2022-11-18 21:11:27,150 INFO L78 Accepts]: Start accepts. Automaton has 13644 states and 67065 transitions. Word has length 15 [2022-11-18 21:11:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:27,150 INFO L495 AbstractCegarLoop]: Abstraction has 13644 states and 67065 transitions. [2022-11-18 21:11:27,150 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) [2022-11-18 21:11:27,150 INFO L276 IsEmpty]: Start isEmpty. Operand 13644 states and 67065 transitions. [2022-11-18 21:11:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:27,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:27,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:27,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (188)] Ended with exit code 0 [2022-11-18 21:11:27,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:27,357 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:27,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:27,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2128648491, now seen corresponding path program 2 times [2022-11-18 21:11:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:27,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703757012] [2022-11-18 21:11:27,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:11:27,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:27,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:27,359 INFO L229 MonitoredProcess]: Starting monitored process 189 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:27,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Waiting until timeout for monitored process [2022-11-18 21:11:27,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:11:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:28,082 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:28,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:28,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:29,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703757012] [2022-11-18 21:11:29,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703757012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:29,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:29,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753585933] [2022-11-18 21:11:29,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:29,218 INFO L87 Difference]: Start difference. First operand 13644 states and 67065 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) [2022-11-18 21:11:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:29,787 INFO L93 Difference]: Finished difference Result 14356 states and 70974 transitions. [2022-11-18 21:11:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:29,789 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 [2022-11-18 21:11:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:29,848 INFO L225 Difference]: With dead ends: 14356 [2022-11-18 21:11:29,848 INFO L226 Difference]: Without dead ends: 14356 [2022-11-18 21:11:29,849 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 [2022-11-18 21:11:29,849 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:29,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 22 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-11-18 21:11:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14356 states. [2022-11-18 21:11:30,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14356 to 13749. [2022-11-18 21:11:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13749 states, 13744 states have (on average 4.928696158323632) internal successors, (67740), 13748 states have internal predecessors, (67740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13749 states to 13749 states and 67740 transitions. [2022-11-18 21:11:30,243 INFO L78 Accepts]: Start accepts. Automaton has 13749 states and 67740 transitions. Word has length 15 [2022-11-18 21:11:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:30,243 INFO L495 AbstractCegarLoop]: Abstraction has 13749 states and 67740 transitions. [2022-11-18 21:11:30,243 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) [2022-11-18 21:11:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 13749 states and 67740 transitions. [2022-11-18 21:11:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:30,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:30,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:30,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (189)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:30,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:30,454 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:30,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2123487921, now seen corresponding path program 3 times [2022-11-18 21:11:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:30,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314098783] [2022-11-18 21:11:30,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:11:30,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:30,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:30,456 INFO L229 MonitoredProcess]: Starting monitored process 190 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:30,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Waiting until timeout for monitored process [2022-11-18 21:11:31,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:11:31,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:31,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:31,178 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:31,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:31,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:32,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:32,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314098783] [2022-11-18 21:11:32,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314098783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:32,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:32,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141506082] [2022-11-18 21:11:32,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:32,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:32,332 INFO L87 Difference]: Start difference. First operand 13749 states and 67740 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) [2022-11-18 21:11:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:32,967 INFO L93 Difference]: Finished difference Result 14444 states and 71757 transitions. [2022-11-18 21:11:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:32,969 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 [2022-11-18 21:11:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:33,028 INFO L225 Difference]: With dead ends: 14444 [2022-11-18 21:11:33,028 INFO L226 Difference]: Without dead ends: 14444 [2022-11-18 21:11:33,028 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 [2022-11-18 21:11:33,029 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:33,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2022-11-18 21:11:33,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14444 states. [2022-11-18 21:11:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14444 to 13795. [2022-11-18 21:11:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13795 states, 13790 states have (on average 4.934735315445975) internal successors, (68050), 13794 states have internal predecessors, (68050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:33,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13795 states to 13795 states and 68050 transitions. [2022-11-18 21:11:33,391 INFO L78 Accepts]: Start accepts. Automaton has 13795 states and 68050 transitions. Word has length 15 [2022-11-18 21:11:33,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:33,391 INFO L495 AbstractCegarLoop]: Abstraction has 13795 states and 68050 transitions. [2022-11-18 21:11:33,391 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) [2022-11-18 21:11:33,391 INFO L276 IsEmpty]: Start isEmpty. Operand 13795 states and 68050 transitions. [2022-11-18 21:11:33,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:33,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:33,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:33,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (190)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:33,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:33,598 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:33,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2136971805, now seen corresponding path program 6 times [2022-11-18 21:11:33,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:33,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031364685] [2022-11-18 21:11:33,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:11:33,599 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 [2022-11-18 21:11:33,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:33,600 INFO L229 MonitoredProcess]: Starting monitored process 191 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:33,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Waiting until timeout for monitored process [2022-11-18 21:11:34,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:11:34,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:34,340 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:34,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:34,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:35,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031364685] [2022-11-18 21:11:35,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031364685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:35,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:35,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9836415] [2022-11-18 21:11:35,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:35,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:35,487 INFO L87 Difference]: Start difference. First operand 13795 states and 68050 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) [2022-11-18 21:11:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:36,173 INFO L93 Difference]: Finished difference Result 14857 states and 73218 transitions. [2022-11-18 21:11:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:36,175 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 [2022-11-18 21:11:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:36,238 INFO L225 Difference]: With dead ends: 14857 [2022-11-18 21:11:36,238 INFO L226 Difference]: Without dead ends: 14857 [2022-11-18 21:11:36,238 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 [2022-11-18 21:11:36,238 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:36,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2022-11-18 21:11:36,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14857 states. [2022-11-18 21:11:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14857 to 13881. [2022-11-18 21:11:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13881 states, 13876 states have (on average 4.934707408475065) internal successors, (68474), 13880 states have internal predecessors, (68474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13881 states to 13881 states and 68474 transitions. [2022-11-18 21:11:36,610 INFO L78 Accepts]: Start accepts. Automaton has 13881 states and 68474 transitions. Word has length 15 [2022-11-18 21:11:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:36,610 INFO L495 AbstractCegarLoop]: Abstraction has 13881 states and 68474 transitions. [2022-11-18 21:11:36,610 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) [2022-11-18 21:11:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13881 states and 68474 transitions. [2022-11-18 21:11:36,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:36,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:36,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:36,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (191)] Ended with exit code 0 [2022-11-18 21:11:36,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:36,816 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:36,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2136967217, now seen corresponding path program 8 times [2022-11-18 21:11:36,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:36,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18642398] [2022-11-18 21:11:36,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:11:36,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:36,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:36,819 INFO L229 MonitoredProcess]: Starting monitored process 192 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:36,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Waiting until timeout for monitored process [2022-11-18 21:11:37,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:11:37,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:37,668 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:37,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:38,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:38,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:38,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18642398] [2022-11-18 21:11:38,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18642398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:38,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:38,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:38,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915103748] [2022-11-18 21:11:38,848 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:38,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:38,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:38,849 INFO L87 Difference]: Start difference. First operand 13881 states and 68474 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) [2022-11-18 21:11:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:39,403 INFO L93 Difference]: Finished difference Result 14324 states and 70549 transitions. [2022-11-18 21:11:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:39,405 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 [2022-11-18 21:11:39,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:39,465 INFO L225 Difference]: With dead ends: 14324 [2022-11-18 21:11:39,465 INFO L226 Difference]: Without dead ends: 14324 [2022-11-18 21:11:39,466 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 [2022-11-18 21:11:39,466 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:39,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-18 21:11:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14324 states. [2022-11-18 21:11:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14324 to 13884. [2022-11-18 21:11:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13884 states, 13879 states have (on average 4.934505367821889) internal successors, (68486), 13883 states have internal predecessors, (68486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13884 states to 13884 states and 68486 transitions. [2022-11-18 21:11:39,834 INFO L78 Accepts]: Start accepts. Automaton has 13884 states and 68486 transitions. Word has length 15 [2022-11-18 21:11:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:39,834 INFO L495 AbstractCegarLoop]: Abstraction has 13884 states and 68486 transitions. [2022-11-18 21:11:39,835 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) [2022-11-18 21:11:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 13884 states and 68486 transitions. [2022-11-18 21:11:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:39,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:39,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:39,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (192)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:40,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:40,043 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:40,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2137118745, now seen corresponding path program 7 times [2022-11-18 21:11:40,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:40,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522324641] [2022-11-18 21:11:40,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:11:40,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:40,046 INFO L229 MonitoredProcess]: Starting monitored process 193 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:40,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Waiting until timeout for monitored process [2022-11-18 21:11:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:11:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:40,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:40,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:41,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:41,857 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:41,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522324641] [2022-11-18 21:11:41,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522324641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:41,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:41,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503004339] [2022-11-18 21:11:41,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:41,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:41,861 INFO L87 Difference]: Start difference. First operand 13884 states and 68486 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) [2022-11-18 21:11:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:42,586 INFO L93 Difference]: Finished difference Result 14792 states and 72957 transitions. [2022-11-18 21:11:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:42,588 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 [2022-11-18 21:11:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:42,648 INFO L225 Difference]: With dead ends: 14792 [2022-11-18 21:11:42,648 INFO L226 Difference]: Without dead ends: 14792 [2022-11-18 21:11:42,648 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 [2022-11-18 21:11:42,649 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:42,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-11-18 21:11:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14792 states. [2022-11-18 21:11:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14792 to 13882. [2022-11-18 21:11:42,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13882 states, 13877 states have (on average 4.934640051884413) internal successors, (68478), 13881 states have internal predecessors, (68478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13882 states to 13882 states and 68478 transitions. [2022-11-18 21:11:43,014 INFO L78 Accepts]: Start accepts. Automaton has 13882 states and 68478 transitions. Word has length 15 [2022-11-18 21:11:43,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:43,015 INFO L495 AbstractCegarLoop]: Abstraction has 13882 states and 68478 transitions. [2022-11-18 21:11:43,015 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) [2022-11-18 21:11:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 13882 states and 68478 transitions. [2022-11-18 21:11:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:43,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:43,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:43,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (193)] Ended with exit code 0 [2022-11-18 21:11:43,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:43,223 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:43,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:43,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2136976517, now seen corresponding path program 9 times [2022-11-18 21:11:43,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:43,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838202307] [2022-11-18 21:11:43,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:11:43,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:43,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:43,225 INFO L229 MonitoredProcess]: Starting monitored process 194 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:43,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Waiting until timeout for monitored process [2022-11-18 21:11:43,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:11:43,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:43,946 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:43,946 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 [2022-11-18 21:11:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:44,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:45,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:45,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838202307] [2022-11-18 21:11:45,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838202307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:45,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:45,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:45,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681114985] [2022-11-18 21:11:45,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:45,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:45,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:45,089 INFO L87 Difference]: Start difference. First operand 13882 states and 68478 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) [2022-11-18 21:11:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:45,644 INFO L93 Difference]: Finished difference Result 14355 states and 70662 transitions. [2022-11-18 21:11:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:45,646 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 [2022-11-18 21:11:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:45,707 INFO L225 Difference]: With dead ends: 14355 [2022-11-18 21:11:45,708 INFO L226 Difference]: Without dead ends: 14355 [2022-11-18 21:11:45,708 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 [2022-11-18 21:11:45,708 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:45,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-11-18 21:11:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2022-11-18 21:11:46,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 13898. [2022-11-18 21:11:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13898 states, 13893 states have (on average 4.9335636651551145) internal successors, (68542), 13897 states have internal predecessors, (68542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13898 states to 13898 states and 68542 transitions. [2022-11-18 21:11:46,081 INFO L78 Accepts]: Start accepts. Automaton has 13898 states and 68542 transitions. Word has length 15 [2022-11-18 21:11:46,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:46,081 INFO L495 AbstractCegarLoop]: Abstraction has 13898 states and 68542 transitions. [2022-11-18 21:11:46,082 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) [2022-11-18 21:11:46,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13898 states and 68542 transitions. [2022-11-18 21:11:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:46,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:46,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:46,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (194)] Ended with exit code 0 [2022-11-18 21:11:46,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:46,288 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2136481695, now seen corresponding path program 8 times [2022-11-18 21:11:46,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:46,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063645469] [2022-11-18 21:11:46,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:11:46,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:46,290 INFO L229 MonitoredProcess]: Starting monitored process 195 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:46,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Waiting until timeout for monitored process [2022-11-18 21:11:46,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:11:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:46,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:47,009 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:47,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:48,227 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:48,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063645469] [2022-11-18 21:11:48,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063645469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:48,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:48,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:48,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704106424] [2022-11-18 21:11:48,228 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:48,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:48,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:48,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:48,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:48,229 INFO L87 Difference]: Start difference. First operand 13898 states and 68542 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) [2022-11-18 21:11:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:48,852 INFO L93 Difference]: Finished difference Result 15121 states and 74550 transitions. [2022-11-18 21:11:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:48,854 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 [2022-11-18 21:11:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:48,918 INFO L225 Difference]: With dead ends: 15121 [2022-11-18 21:11:48,918 INFO L226 Difference]: Without dead ends: 15121 [2022-11-18 21:11:48,918 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 [2022-11-18 21:11:48,918 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:48,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 31 Unchecked, 0.5s Time] [2022-11-18 21:11:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15121 states. [2022-11-18 21:11:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15121 to 13841. [2022-11-18 21:11:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13841 states, 13836 states have (on average 4.9335790690951145) internal successors, (68261), 13840 states have internal predecessors, (68261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:49,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 68261 transitions. [2022-11-18 21:11:49,299 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 68261 transitions. Word has length 15 [2022-11-18 21:11:49,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:49,299 INFO L495 AbstractCegarLoop]: Abstraction has 13841 states and 68261 transitions. [2022-11-18 21:11:49,300 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) [2022-11-18 21:11:49,300 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 68261 transitions. [2022-11-18 21:11:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:49,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:49,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:49,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (195)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:49,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:49,506 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:49,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:49,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2136477107, now seen corresponding path program 10 times [2022-11-18 21:11:49,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:49,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921682849] [2022-11-18 21:11:49,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:11:49,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:49,508 INFO L229 MonitoredProcess]: Starting monitored process 196 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:49,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Waiting until timeout for monitored process [2022-11-18 21:11:50,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:11:50,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:50,180 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:50,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:50,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:51,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:51,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921682849] [2022-11-18 21:11:51,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921682849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:51,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:51,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:51,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336657108] [2022-11-18 21:11:51,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:51,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:51,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:51,298 INFO L87 Difference]: Start difference. First operand 13841 states and 68261 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) [2022-11-18 21:11:52,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:52,030 INFO L93 Difference]: Finished difference Result 14141 states and 69695 transitions. [2022-11-18 21:11:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:52,032 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 [2022-11-18 21:11:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:52,089 INFO L225 Difference]: With dead ends: 14141 [2022-11-18 21:11:52,089 INFO L226 Difference]: Without dead ends: 14141 [2022-11-18 21:11:52,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:11:52,090 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:52,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-11-18 21:11:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14141 states. [2022-11-18 21:11:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14141 to 13843. [2022-11-18 21:11:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13843 states, 13838 states have (on average 4.9335164041046395) internal successors, (68270), 13842 states have internal predecessors, (68270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13843 states to 13843 states and 68270 transitions. [2022-11-18 21:11:52,449 INFO L78 Accepts]: Start accepts. Automaton has 13843 states and 68270 transitions. Word has length 15 [2022-11-18 21:11:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:52,449 INFO L495 AbstractCegarLoop]: Abstraction has 13843 states and 68270 transitions. [2022-11-18 21:11:52,449 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) [2022-11-18 21:11:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 13843 states and 68270 transitions. [2022-11-18 21:11:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:52,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:52,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:52,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (196)] Ended with exit code 0 [2022-11-18 21:11:52,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:52,656 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:52,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2136612608, now seen corresponding path program 8 times [2022-11-18 21:11:52,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:52,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069677614] [2022-11-18 21:11:52,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:11:52,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:52,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:52,657 INFO L229 MonitoredProcess]: Starting monitored process 197 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:52,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Waiting until timeout for monitored process [2022-11-18 21:11:53,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:11:53,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:53,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:53,361 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:53,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:53,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:54,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:54,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069677614] [2022-11-18 21:11:54,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069677614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:54,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:54,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:54,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453601168] [2022-11-18 21:11:54,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:54,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:54,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:54,489 INFO L87 Difference]: Start difference. First operand 13843 states and 68270 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) [2022-11-18 21:11:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:55,150 INFO L93 Difference]: Finished difference Result 14491 states and 71641 transitions. [2022-11-18 21:11:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:11:55,152 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 [2022-11-18 21:11:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:55,215 INFO L225 Difference]: With dead ends: 14491 [2022-11-18 21:11:55,215 INFO L226 Difference]: Without dead ends: 14491 [2022-11-18 21:11:55,215 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 [2022-11-18 21:11:55,216 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:55,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-11-18 21:11:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14491 states. [2022-11-18 21:11:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14491 to 13953. [2022-11-18 21:11:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13953 states, 13948 states have (on average 4.941783768282191) internal successors, (68928), 13952 states have internal predecessors, (68928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13953 states to 13953 states and 68928 transitions. [2022-11-18 21:11:55,620 INFO L78 Accepts]: Start accepts. Automaton has 13953 states and 68928 transitions. Word has length 15 [2022-11-18 21:11:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:55,620 INFO L495 AbstractCegarLoop]: Abstraction has 13953 states and 68928 transitions. [2022-11-18 21:11:55,620 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) [2022-11-18 21:11:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 13953 states and 68928 transitions. [2022-11-18 21:11:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:55,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:55,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:55,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (197)] Forceful destruction successful, exit code 0 [2022-11-18 21:11:55,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:55,826 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:55,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:55,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2141167965, now seen corresponding path program 9 times [2022-11-18 21:11:55,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:55,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016370743] [2022-11-18 21:11:55,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:11:55,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:55,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:55,828 INFO L229 MonitoredProcess]: Starting monitored process 198 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:55,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Waiting until timeout for monitored process [2022-11-18 21:11:56,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:11:56,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:56,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:56,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:56,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:11:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:56,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:11:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:11:57,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:11:57,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016370743] [2022-11-18 21:11:57,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016370743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:11:57,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:11:57,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:11:57,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228437171] [2022-11-18 21:11:57,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:11:57,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:11:57,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:11:57,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:11:57,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:11:57,739 INFO L87 Difference]: Start difference. First operand 13953 states and 68928 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) [2022-11-18 21:11:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:11:58,333 INFO L93 Difference]: Finished difference Result 14620 states and 72176 transitions. [2022-11-18 21:11:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:11:58,335 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 [2022-11-18 21:11:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:11:58,395 INFO L225 Difference]: With dead ends: 14620 [2022-11-18 21:11:58,395 INFO L226 Difference]: Without dead ends: 14620 [2022-11-18 21:11:58,396 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 [2022-11-18 21:11:58,396 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:11:58,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2022-11-18 21:11:58,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14620 states. [2022-11-18 21:11:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14620 to 13979. [2022-11-18 21:11:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13979 states, 13974 states have (on average 4.941892085301274) internal successors, (69058), 13978 states have internal predecessors, (69058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:11:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13979 states to 13979 states and 69058 transitions. [2022-11-18 21:11:58,821 INFO L78 Accepts]: Start accepts. Automaton has 13979 states and 69058 transitions. Word has length 15 [2022-11-18 21:11:58,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:11:58,822 INFO L495 AbstractCegarLoop]: Abstraction has 13979 states and 69058 transitions. [2022-11-18 21:11:58,822 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) [2022-11-18 21:11:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 13979 states and 69058 transitions. [2022-11-18 21:11:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:11:58,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:11:58,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:11:58,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (198)] Ended with exit code 0 [2022-11-18 21:11:59,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:59,028 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:11:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:11:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -2141167748, now seen corresponding path program 9 times [2022-11-18 21:11:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:11:59,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406199849] [2022-11-18 21:11:59,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:11:59,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:11:59,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:11:59,030 INFO L229 MonitoredProcess]: Starting monitored process 199 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:11:59,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Waiting until timeout for monitored process [2022-11-18 21:11:59,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 21:11:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:11:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:11:59,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:11:59,767 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:11:59,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:00,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:00,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:12:00,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406199849] [2022-11-18 21:12:00,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406199849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:00,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:00,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:12:00,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377393317] [2022-11-18 21:12:00,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:00,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:12:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:12:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:12:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:12:00,948 INFO L87 Difference]: Start difference. First operand 13979 states and 69058 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) [2022-11-18 21:12:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:01,665 INFO L93 Difference]: Finished difference Result 14356 states and 70942 transitions. [2022-11-18 21:12:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:12:01,667 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 [2022-11-18 21:12:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:01,725 INFO L225 Difference]: With dead ends: 14356 [2022-11-18 21:12:01,725 INFO L226 Difference]: Without dead ends: 14356 [2022-11-18 21:12:01,725 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 [2022-11-18 21:12:01,725 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:01,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-11-18 21:12:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14356 states. [2022-11-18 21:12:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14356 to 13978. [2022-11-18 21:12:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13978 states, 13973 states have (on average 4.941887926715809) internal successors, (69053), 13977 states have internal predecessors, (69053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13978 states to 13978 states and 69053 transitions. [2022-11-18 21:12:02,102 INFO L78 Accepts]: Start accepts. Automaton has 13978 states and 69053 transitions. Word has length 15 [2022-11-18 21:12:02,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:02,102 INFO L495 AbstractCegarLoop]: Abstraction has 13978 states and 69053 transitions. [2022-11-18 21:12:02,102 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) [2022-11-18 21:12:02,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13978 states and 69053 transitions. [2022-11-18 21:12:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:12:02,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:02,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:02,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (199)] Ended with exit code 0 [2022-11-18 21:12:02,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:02,309 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:12:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:02,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2141177048, now seen corresponding path program 10 times [2022-11-18 21:12:02,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:12:02,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044838181] [2022-11-18 21:12:02,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:12:02,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:02,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:12:02,311 INFO L229 MonitoredProcess]: Starting monitored process 200 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:12:02,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Waiting until timeout for monitored process [2022-11-18 21:12:02,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:12:02,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:12:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:02,989 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:12:02,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:03,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:04,095 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:12:04,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044838181] [2022-11-18 21:12:04,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044838181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:04,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:04,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:12:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760451227] [2022-11-18 21:12:04,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:04,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:12:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:12:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:12:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:12:04,096 INFO L87 Difference]: Start difference. First operand 13978 states and 69053 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) [2022-11-18 21:12:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:04,685 INFO L93 Difference]: Finished difference Result 14445 states and 71407 transitions. [2022-11-18 21:12:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:12:04,686 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 [2022-11-18 21:12:04,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:04,747 INFO L225 Difference]: With dead ends: 14445 [2022-11-18 21:12:04,747 INFO L226 Difference]: Without dead ends: 14445 [2022-11-18 21:12:04,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:12:04,748 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:04,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2022-11-18 21:12:04,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14445 states. [2022-11-18 21:12:05,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14445 to 13978. [2022-11-18 21:12:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13978 states, 13973 states have (on average 4.941887926715809) internal successors, (69053), 13977 states have internal predecessors, (69053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13978 states to 13978 states and 69053 transitions. [2022-11-18 21:12:05,154 INFO L78 Accepts]: Start accepts. Automaton has 13978 states and 69053 transitions. Word has length 15 [2022-11-18 21:12:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:05,154 INFO L495 AbstractCegarLoop]: Abstraction has 13978 states and 69053 transitions. [2022-11-18 21:12:05,155 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) [2022-11-18 21:12:05,155 INFO L276 IsEmpty]: Start isEmpty. Operand 13978 states and 69053 transitions. [2022-11-18 21:12:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:12:05,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:05,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:05,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (200)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:05,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:05,361 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:12:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2136758897, now seen corresponding path program 11 times [2022-11-18 21:12:05,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:12:05,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583074905] [2022-11-18 21:12:05,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:12:05,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:05,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:12:05,363 INFO L229 MonitoredProcess]: Starting monitored process 201 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:12:05,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Waiting until timeout for monitored process [2022-11-18 21:12:05,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:12:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:05,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:12:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:06,148 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:12:06,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:06,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:07,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:12:07,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583074905] [2022-11-18 21:12:07,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583074905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:07,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:07,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:12:07,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436529163] [2022-11-18 21:12:07,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:07,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:12:07,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:12:07,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:12:07,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:12:07,504 INFO L87 Difference]: Start difference. First operand 13978 states and 69053 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) [2022-11-18 21:12:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:08,141 INFO L93 Difference]: Finished difference Result 14296 states and 70551 transitions. [2022-11-18 21:12:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:12:08,143 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 [2022-11-18 21:12:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:08,204 INFO L225 Difference]: With dead ends: 14296 [2022-11-18 21:12:08,204 INFO L226 Difference]: Without dead ends: 14296 [2022-11-18 21:12:08,204 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 [2022-11-18 21:12:08,204 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:08,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 21 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 67 Unchecked, 0.5s Time] [2022-11-18 21:12:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14296 states. [2022-11-18 21:12:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14296 to 13979. [2022-11-18 21:12:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13979 states, 13974 states have (on average 4.9418205238299695) internal successors, (69057), 13978 states have internal predecessors, (69057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13979 states to 13979 states and 69057 transitions. [2022-11-18 21:12:08,579 INFO L78 Accepts]: Start accepts. Automaton has 13979 states and 69057 transitions. Word has length 15 [2022-11-18 21:12:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:08,579 INFO L495 AbstractCegarLoop]: Abstraction has 13979 states and 69057 transitions. [2022-11-18 21:12:08,579 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) [2022-11-18 21:12:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 13979 states and 69057 transitions. [2022-11-18 21:12:08,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:12:08,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:08,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:08,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (201)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:08,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:08,786 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:12:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2136763268, now seen corresponding path program 11 times [2022-11-18 21:12:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:12:08,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514267111] [2022-11-18 21:12:08,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:12:08,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:12:08,787 INFO L229 MonitoredProcess]: Starting monitored process 202 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:12:08,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Waiting until timeout for monitored process [2022-11-18 21:12:09,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:12:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:12:09,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:09,551 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:12:09,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:10,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:10,923 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:12:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514267111] [2022-11-18 21:12:10,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514267111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:10,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:10,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 21:12:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086623098] [2022-11-18 21:12:10,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:12:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:12:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:12:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:12:10,925 INFO L87 Difference]: Start difference. First operand 13979 states and 69057 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) [2022-11-18 21:12:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:11,392 INFO L93 Difference]: Finished difference Result 14271 states and 70515 transitions. [2022-11-18 21:12:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 21:12:11,393 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 [2022-11-18 21:12:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:11,453 INFO L225 Difference]: With dead ends: 14271 [2022-11-18 21:12:11,453 INFO L226 Difference]: Without dead ends: 14271 [2022-11-18 21:12:11,453 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 [2022-11-18 21:12:11,453 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:11,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-18 21:12:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14271 states. [2022-11-18 21:12:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14271 to 13979. [2022-11-18 21:12:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13979 states, 13974 states have (on average 4.9418205238299695) internal successors, (69057), 13978 states have internal predecessors, (69057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13979 states to 13979 states and 69057 transitions. [2022-11-18 21:12:11,820 INFO L78 Accepts]: Start accepts. Automaton has 13979 states and 69057 transitions. Word has length 15 [2022-11-18 21:12:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:11,820 INFO L495 AbstractCegarLoop]: Abstraction has 13979 states and 69057 transitions. [2022-11-18 21:12:11,821 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) [2022-11-18 21:12:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 13979 states and 69057 transitions. [2022-11-18 21:12:11,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:12:11,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:11,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:11,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (202)] Ended with exit code 0 [2022-11-18 21:12:12,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:12,027 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:12:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 531560241, now seen corresponding path program 12 times [2022-11-18 21:12:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:12:12,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134823962] [2022-11-18 21:12:12,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 21:12:12,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:12,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:12:12,029 INFO L229 MonitoredProcess]: Starting monitored process 203 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:12:12,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Waiting until timeout for monitored process [2022-11-18 21:12:12,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 21:12:12,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:12,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:12:12,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:12,753 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:12:12,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:13,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:13,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:12:13,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134823962] [2022-11-18 21:12:13,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134823962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:13,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:13,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:12:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354790480] [2022-11-18 21:12:13,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:13,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:12:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:12:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:12:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:12:13,953 INFO L87 Difference]: Start difference. First operand 13979 states and 69057 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) [2022-11-18 21:12:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:14,766 INFO L93 Difference]: Finished difference Result 14936 states and 73453 transitions. [2022-11-18 21:12:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:12:14,768 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 [2022-11-18 21:12:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:14,830 INFO L225 Difference]: With dead ends: 14936 [2022-11-18 21:12:14,830 INFO L226 Difference]: Without dead ends: 14936 [2022-11-18 21:12:14,831 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 [2022-11-18 21:12:14,831 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:14,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 52 Unchecked, 0.6s Time] [2022-11-18 21:12:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14936 states. [2022-11-18 21:12:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14936 to 14007. [2022-11-18 21:12:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14007 states, 14002 states have (on average 4.941936866161977) internal successors, (69197), 14006 states have internal predecessors, (69197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:15,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14007 states to 14007 states and 69197 transitions. [2022-11-18 21:12:15,210 INFO L78 Accepts]: Start accepts. Automaton has 14007 states and 69197 transitions. Word has length 15 [2022-11-18 21:12:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:15,210 INFO L495 AbstractCegarLoop]: Abstraction has 14007 states and 69197 transitions. [2022-11-18 21:12:15,211 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) [2022-11-18 21:12:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14007 states and 69197 transitions. [2022-11-18 21:12:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:12:15,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:15,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:15,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (203)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:15,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:15,417 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:12:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash 407331771, now seen corresponding path program 13 times [2022-11-18 21:12:15,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:12:15,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920432248] [2022-11-18 21:12:15,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 21:12:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:15,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:12:15,419 INFO L229 MonitoredProcess]: Starting monitored process 204 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:12:15,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Waiting until timeout for monitored process [2022-11-18 21:12:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:12:15,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:12:15,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:16,112 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:12:16,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:16,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:17,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:12:17,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920432248] [2022-11-18 21:12:17,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920432248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:17,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:17,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 21:12:17,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350758749] [2022-11-18 21:12:17,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:17,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:12:17,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:12:17,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:12:17,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:12:17,229 INFO L87 Difference]: Start difference. First operand 14007 states and 69197 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) [2022-11-18 21:12:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:17,936 INFO L93 Difference]: Finished difference Result 15152 states and 74693 transitions. [2022-11-18 21:12:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 21:12:17,938 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 [2022-11-18 21:12:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:18,001 INFO L225 Difference]: With dead ends: 15152 [2022-11-18 21:12:18,002 INFO L226 Difference]: Without dead ends: 15152 [2022-11-18 21:12:18,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-18 21:12:18,002 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:18,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2022-11-18 21:12:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15152 states. [2022-11-18 21:12:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15152 to 14009. [2022-11-18 21:12:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14009 states, 14004 states have (on average 4.941659525849757) internal successors, (69203), 14008 states have internal predecessors, (69203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14009 states to 14009 states and 69203 transitions. [2022-11-18 21:12:18,382 INFO L78 Accepts]: Start accepts. Automaton has 14009 states and 69203 transitions. Word has length 15 [2022-11-18 21:12:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:18,382 INFO L495 AbstractCegarLoop]: Abstraction has 14009 states and 69203 transitions. [2022-11-18 21:12:18,383 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) [2022-11-18 21:12:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 14009 states and 69203 transitions. [2022-11-18 21:12:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:12:18,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:18,388 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:18,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (204)] Forceful destruction successful, exit code 0 [2022-11-18 21:12:18,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:18,589 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:12:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:18,590 INFO L85 PathProgramCache]: Analyzing trace with hash 134909723, now seen corresponding path program 5 times [2022-11-18 21:12:18,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:12:18,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923894457] [2022-11-18 21:12:18,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:12:18,590 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:18,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:12:18,591 INFO L229 MonitoredProcess]: Starting monitored process 205 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:12:18,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Waiting until timeout for monitored process [2022-11-18 21:12:19,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 21:12:19,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:19,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 21:12:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:19,346 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:12:19,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:19,802 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 [2022-11-18 21:12:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:19,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:12:20,078 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 [2022-11-18 21:12:20,105 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:12:20,109 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-18 21:12:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:12:22,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:12:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923894457] [2022-11-18 21:12:22,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923894457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:12:22,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:12:22,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-11-18 21:12:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232598266] [2022-11-18 21:12:22,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:12:22,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 21:12:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:12:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 21:12:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:12:22,109 INFO L87 Difference]: Start difference. First operand 14009 states and 69203 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) 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) [2022-11-18 21:12:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:12:26,378 INFO L93 Difference]: Finished difference Result 14244 states and 69867 transitions. [2022-11-18 21:12:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 21:12:26,380 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) 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 [2022-11-18 21:12:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:12:26,439 INFO L225 Difference]: With dead ends: 14244 [2022-11-18 21:12:26,440 INFO L226 Difference]: Without dead ends: 14244 [2022-11-18 21:12:26,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:12:26,440 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 21:12:26,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 103 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 276 Invalid, 0 Unknown, 118 Unchecked, 2.8s Time] [2022-11-18 21:12:26,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14244 states. [2022-11-18 21:12:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14244 to 14019. [2022-11-18 21:12:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14019 states, 14014 states have (on average 4.941344369915798) internal successors, (69248), 14018 states have internal predecessors, (69248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:12:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14019 states to 14019 states and 69248 transitions. [2022-11-18 21:12:26,809 INFO L78 Accepts]: Start accepts. Automaton has 14019 states and 69248 transitions. Word has length 15 [2022-11-18 21:12:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:12:26,809 INFO L495 AbstractCegarLoop]: Abstraction has 14019 states and 69248 transitions. [2022-11-18 21:12:26,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) 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) [2022-11-18 21:12:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 14019 states and 69248 transitions. [2022-11-18 21:12:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:12:26,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:12:26,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:12:26,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (205)] Ended with exit code 0 [2022-11-18 21:12:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:27,016 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-18 21:12:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:12:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash 639454885, now seen corresponding path program 10 times [2022-11-18 21:12:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:12:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264835225] [2022-11-18 21:12:27,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:12:27,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:12:27,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:12:27,018 INFO L229 MonitoredProcess]: Starting monitored process 206 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 21:12:27,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88abff97-3c5f-42ed-bbca-6525dec1ec96/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (206)] Waiting until timeout for monitored process [2022-11-18 21:12:27,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:12:27,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:12:27,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 21:12:27,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:12:27,729 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:12:27,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:12:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:12:28,138 INFO L328 TraceCheckSpWp]: Computing backward predicates...